thumb|A printed quiz on health issues A quiz is a form of mind sport in which people attempt to answer questions correctly on one or several topics. Quizzes can be used as a brief assessment in educat
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305c407c6cbcd3ee57a59ccc54dd9ff65e28e3579d43ea04a14fb6eae287040d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6caf0924-07e0-4dfb-89ed-a6fa449e1e3e.json and https://artists.proofprofile.net/proofs/artist/6caf0924-07e0-4dfb-89ed-a6fa449e1e3e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f7b7b8d60b36adcde739c15a9a6e39aae19c59dfeb8f2696c2346a9ed2079e. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH871300052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d441b7ff57d360f6c4dbb3c712a87711d8c4c87dc40ed62fc20f47d632c1c85. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH871300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa883d5b440ab98f03c3749e24ddbfc00ae6a762a0bd910a0f5cedad0595e0b90. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH871300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5e024773ebb01f496e401bb8d28d5c83b28baafdcb4d142ae72a5bad17d156. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH871300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5610e1d004ad2c31628b1f3904848bf1dc9fc8982e8b2bbf33a71134f958552. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH871300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd791b03cc47e2a34d14871c8e054256a7115fc53614572f6106ccca5d87df848. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH871300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f61f843af7ddbcd646398c031e1bbb116d2b370b6283e8d6895acf1bec06b2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH871300058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0f6024a10aec697d63bf9871baf3a60724b10512dbcbaf09eb5ce77aa9e82c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH871300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d4f4bb561a361395e3b1d58c9734ff82edddcc2136bbbc5e6b15642956e33b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH871300060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192f1c2f3d8ccfe71974d741f83e9277fe896379b29e8affeb56cb73bc5d1099. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH871300061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfde6952f824541a4273ba078929ff05b1c552efe4bf9660c7b4d2da994ea20d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH871300062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33229bdc47ec455a6ce76d7c119ebe1d592eaaf4e67763de13c338a49089e884. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH871300063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97364b03b510a80567152ce1031b9758fb10ca6c6904f7613fa1e5bd72559af. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH871300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38899dd0c699e28a5e9fbba7ebf01fced41656b4949e32e67d555836c080830d. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH871300065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c32196e2b6b704ec5085202e58e445974bcfe3f44cb0a6479fe4629b7f5d8d7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH871300066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f8d5e2d0cc1e05e360d620efe0370396a498bd0f3d3e4fd894ce5d18e004d2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH871300067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef1ce8d75f801702aeb95b9c335f22958538bc3d388e79eac4af5a4c6bea65d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH871300068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2306a79b5cbdbd6b70f760dceddf3210a24b2cdfcbf9e8adc1e212a8369767f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH871300069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a33bf8bef774e4be6bc66fd8c75ac954a2e5d7562178765e94f6614006326a. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH871300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73423db0032634f04a2dcadb7910c671ff5ecd4a86e7e0cbb82ecd4c8c96906. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH871300071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420c9b45679fa09003c82b593d52b7a07152059a2d413ebb302fb4d9666443ef. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PL20I2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c486caf8cf1c8ff5e7f648304a1182ad541a45648dcffac6a76ff4ed984ff46. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PL20I2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a933a7cc23d90e676cf19eb1eb4f86e235b79da6015fe8404a3866a8d508bb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PL20I2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3a147056e4b1a5dd7d79f7cbda23c4f0b04131c3b67850e092cb47708b316b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PL20I2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa366dd0f8aab34a5f2166d74333aae54bd17f94f1710bf24ba59d1b4101f33b1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PL20I2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeff02d3be4321ec2f3bd3840948791dacba5274830d65cb621133340c88c14e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PL20I2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae731374389ff7e5c852baa5801f78083b5a1e98bb6e66450967da001647ec15. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PL20I2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8f53498e93bcb8aeab6c8707e0de10eba73d513b1ff2e617100026f194ebda. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PL20I2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97be39cdf91efc64661af6aa1e90d3c10dbbb61309c43a8866cf0ad2c46ec3e6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PL20I2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d38ce979b17d11a2ac50f7a11dbc58fb7c21c822acdfddb31501be7775b714b. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PL20I2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f8944ea21d60bedb6026608981df96f81afcaf3f253d4acf1ed8319039d1d9. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH871300182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3a867a166708253c1adced8813c212a29a10c4ed0dc0c73cca28985ee75efd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH871300183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5489474c8bcfd112273d846e78f5585680deb3937c304ba105bcdff16e1b61. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH871300184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1056bbeac3ccafd2444ee5e3b54f4a72052cc7251b690c5c51a2a7219ed566b6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH871300185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4aa23fd70ed90b36b4b1e848e30b4a041f7f8d54d94c736f9557bee9cc1b975. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH871300186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7828357242b7364c4bab93032d9097525222967b58f15e8cf2c406708c8d9086. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH871300187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80627ba8219f40167896293429448c4faef494810d393e7ff03e0e02c3aeeba. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH871300188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c02eef246bc53deacc7bff01ec9196c24dc910b642bd9fbb9eef18bf0f3157. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH871300189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb347343bb1d33f35a488b2c97e8ce20cc85d8605c35c5f8623f994844fa1f415. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH871300190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fa3c6c23c69712b31781929244af6e6e75cdab1354abf5b2e860d9c3446d6f. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH871300191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7244cf9af0f74c1a9255c7850cfee21903420ba0b3f1a88de77842c446b9397. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH871300192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76a2bbb9ca3a6d4dcc4e23816c84270d11217dae4baed6a45d56fedfd178fc4. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH871300193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9691e339e48fae6846b1c4b2ec51e946dad06986b489ca4572a48840db519bba. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH871300194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa621e6e2782f5799c43767624ec89e72abe4ebcb4c42daf414f64b5004078df. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH871300319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e508dfd747b1c5ded94ce7dd7bb156d2b6db21f49cff1b3a8f37fd3e5f6773. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH871300365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18457637b0df69e801409a1b5d26eebbe77a97e2216dde2964fed2d5fcdb1217. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLH871300367.
Dom Dla Zmyślonych Przyjaciół Pana Mateusza
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee0f46b74b50d923e22000308ddc9346e64147e5ee6c41c3617c81892895caf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLUM72200082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8738e47bacc004c20690034ce8908111d0044e7e30b20c9d76214f0920d37c6c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLUM72200127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c38686ba9af4531c82b87a08f3b1bff3bd6c6023747cfae58166061effc8f4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLUM72200144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33771170c1890cbbe40f9cf2df49d6f06ce06afde5776b8057f98d55dcea7a6c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLUM72200109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d683bc4b9f22dfb2d6a254bc04b5a6d49aa90963584131a8e51d59541af201. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLUM72200145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb64e8a299cc72cf12f8a6150e3f3c97e4a58d9d04c439790a43b4410db6d0f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLUM72200146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e707eb5b4f00dd6a8faed90c14681e2dd85a8182b9598948be2a1bbe0b128d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLUM72200147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa436547536d176a569363558f94b9bba41c5a5f31b2fc359ceab3901833d8a46. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLUM72200148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f4a7b148278a3033b8e992cb6ac64419d70c44ead0ceb1fca1d7573170f054. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLUM72200149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabd7e7b9adf2802bcdf48b0f8da22ce5e1e0cbc5dc3f83b38fd573aa99b4114. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLUM72200150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5c98af5fbb10ed1a67c96dd440bde5c95bca0427f9736a11b97fdae27f20a1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLUM72200151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dad1ef4dee2d25732b62c3ffcc11ed266df7a7558cc51c50b9933a5b1391de5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLI368557920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664148338d8e7fe6c6ccd01b95664113aa1addac093c5c5f69189b817f625c5f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLI368557930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719571dd683a46c2605478e8a15e4d4ca10825d40bca2423e2a0771a75e27d25. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLI368557941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ad34f967e60389bf016aef31f607c18ef939719906169a05bd052a69a66645. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLI368557950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e661cebd2743ac8180dbf75653b18c8ffb813bf28386f52e9aa0d52cdca98c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLI366081870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fde74527381dd61cb51a3daaf86abfa99e098102710c0a59ab3efc1c043e893. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLI368557970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ebc22f700318e2f90514f17dbae768ef28934192481963910b89a6b615b0ac. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLI368557980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7d726ca3027d0b69cc41faebf74ffa1b519325a4288c5167a41c5aadaf4b2c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLI368557990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d19669953f488d2f306fcbf73c74a3d2177f06dd44a0434dbb8601e353dee85. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLI368558000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669ab7b3d7e3f1787c3c11801644410f4841f70a068f84e5118254af8e124a7d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLI361444350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8011010d57373d67dc1ea26a5ae0d3bf24448d47f8fe015d4754bbbbc0f4028c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLI361444420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26dd9e2d158361385e19541bcfae2d29776de44f38ed74ad5f5d181f7b729645. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLI361444340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029fde5967d6c7aebc2418d4f2b065ae7d39ac00463ed8452b25a1c58173d445. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLI361444360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf834669b3c7c5fb5a53c8edbf42daa6a0bc93bcad79827b9610abe1f9cf0dcb7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLI361444370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0721df209ea94758e9c20ae401e281a401aa4471c060e4d9f3f9f036716d42a6. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLI361444380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d8ee653f2cf57f1e0dbb1e86f94cb3569c93022b53eb0d9d33fb23476b3f2e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLI361444390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8042b0cc274df26e8bc0fda7455984c307badb9a0c71a2a0d5df0c059418584. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLI361444430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8951648eac686b93fdc388454b6cb5d72a300689c6d9dbdac7fd335304985fd6. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLI361444400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01bf13bb344c19c9d5933b07e36f56462814d073260ed1bcc95f3c68db3b2604. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLI361444410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e661cebd2743ac8180dbf75653b18c8ffb813bf28386f52e9aa0d52cdca98c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLI366081870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb713c47d93e9ce0813a7f6eafc566625a213c6d1e1832b16342e69b167284233. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLUM72100316.