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 0xe029bb80df2d1b6c86f65d5c89dac3ea337447695f67131ee66db2a1914857ea. 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/e7aeded8-9bed-4802-8e88-b697559c4903.json and https://artists.proofprofile.net/proofs/artist/e7aeded8-9bed-4802-8e88-b697559c4903.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 0xac96a0dea47c2bc01a189ab11c6d53ff2c3ab01dac6d144323630ecf30f3d0f2. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/USHM81094094.
Come va (non ha piovuto poi tanto in questa nostra città)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fd1e3bc6e823bcefc32fe752102c18b0d599581ff35b7d6aeed53cba5e03bf. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHM81094095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdf94ec35ecc02861d54ee496bee57f3ab2b428979d7d8e53ae6c56a1294e0a. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USHM81094096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64dbab3be59c231b85a833746996ea9711a44312bf82fbd04a20d010805b60f1. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USHM81094097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09e730b1f4a5e2509dbc309bf1db71b3792c220801e8b4ad2ba6891baa4e009. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USHM81094098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7f1662246d44cf9248758b179cf9550472ab012272cbe91771275a9baa2696. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM81094099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b4ab7330cdbebcfc6b1f6ff1a879d837084daf77f3dd0c6a2206f74a26d0ea. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM81094100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31a61bbd04528f23f5e7982bf4ab8586fe01aac487aad1df6676f3adcd6e602. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHM81094101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e70298948c64247972afa7f9ce34b124b2475634d3362645b60085fbd5ed6e2. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/USHM81094102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a49e28f24dacdf977379d980255cf635b55fae5a7b8bd0346664285a1a9a19. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHM81094103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a3179643591df466bb818bceb3ba90fac7113c37a435fe88b34cfebece19fd. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USCGH1278116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b74a98a62d0a521bc16d3ad7d77976a49dc71624b7079befee973b6c44ad11b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USCGH1278117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73ef23d400e63b80e9f1828cb2fd685b2aaae813c223fc2a6cfd12c3816537c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USCGH1278118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f78263b3ea027f4fd76b7808b528093052873a5e04aeb428a9766b404b0b4d6. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USCGH1278119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9dd0dea2f1b5bf38b05ae2dbd70642b02798fe04da6737be0891cd868d08d64. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USCGH1278120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089b56c977a227d60702955e4771dbe08b53d998c2fcbf79414d3486f5b83025. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USCGH1278121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8430461256485f4febcd2919303efd2d406d8faf8cdf8da256e2a22bb7251d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USCGH1278122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4e91d5e0d6b941a3da19f65bf46ca5528d6a9386b3916e52758e61ee4f0dc3. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/USCGH1278123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b6c58bcd6cf896b93e09f446d20dba2abdd7d84925879f56fafef0cbaee6e5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USCGH1278124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ce28c121fdfb780bddd3f232e17521ad251ba67d9dbecf233ebb34e7b6ff60. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/USCGH1278125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60540f40c3a3f662ee065fc9e1e98f4e2fba4c434689b1ece71cd06b974aa725. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USCGH1278126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03939574aa982cdabd2d8a0326709e3aeeebc8e97bf3e9db3437a62af07687e0. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USCGH1278127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00fcba6fdfdd128134920a94ebfd9ee6ebf4fd03d109411b1a300264d82a2c54. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/USCGH1278128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca49c1e1f8dc9ac84859b7b071383884198701b28b6cd6037d9bf45fad74876. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USCGH1278129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e490d89319f8993c7ee6b117d18b48d2b354646e37133ca1374eb6585da0a0. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/USHM82202185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb2c7e215e0b6e03ce263ee6e3978dace244a6d4bbde4c3313e6c568f03ccff. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHM82202186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73c3860a6261a94070e2c4f0d779f3dc362aa3ca76126595435ec02c09d19d4. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USHM82202187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad37a3e224e7418f691ec850356b8ae7d9617d4b315462ae8bb2cca8d6cc3059. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/USHM82202188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e6c29c0142f12f0a336967d15a119b114fb4b9db838a0d64442b4bdb2d18ae. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/USHM82202189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a444842132780477d80848004345970b9c426920d6785a30a9c2c6d8a596c6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHM82202190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b8631f627c8dc1f6498058db71ca5f20b555ebd748c11faaa9c0665da8ea37. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/USHM82202191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db9dfa8f9a3d6570c8f75121db3542319102cb624aa971665332cce824c94e6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHM82202192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32e933f2942986e2a560e789940c1c8c8373e66fdb7f57e0767ce8bffa455c9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM82202193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6c2f0910648419dcef892493c5d521b574b0038142072ea3e4bb938f813dfb. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/USHM82202194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511885ac09ac6293da5b4e1dfd4e0d81b09cba2c7c3f463bd18066a942ada108. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USHM82202195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d979b52defa00f48a1a351a98150f969c5874673148a3688d768e6a351bdeff. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USHM82202196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa2cdf3731f54ad139cecf54633a48b1685e0d7c8501c75d2669b6f98234c73. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USHM82202197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7d4aba5c19215ac1d9cc3397aed8b567e8ba33531681d94486371f3f505601. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USHM82202198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03cdc7ac6b7797922d4c9b8a23cc4743c6beaa6bf1da28b11dff03ea3662b64. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/USHM82202199.