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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b008b6a6dd885b6d54f2588f729eae5edb7f3edc01ba2eb69daecbf3ce5699. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cdc5373a-4f81-441c-af7f-eac3f1bca520.json and https://artists.proofprofile.net/proofs/artist/cdc5373a-4f81-441c-af7f-eac3f1bca520.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e459472290c661ec1cc53f9796f0909d9719e7feaf8f81dc2ffc24b48c7e927. 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/NLRD52416695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966919f21b538046a3a0daa4067d2acf44d891349328abea97db074ae47fc9be. 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/NLRD52303982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1a6880f17074376f94e91f99e314d3b29d6becacbc35976319aaa72f3cea22. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLRD52119505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4debb3983b747912e6212fdc1504dc57536f640a0e519bdb32d754e5411d0cf0. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CH7812103558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52620b66bc96fced0f77a081b527f813b32032c2c7149f53c6cfe518f7b48515. 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/CH7812103559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21518be342dfe71996fbef5a77ddf443d6db77ebdbfff50007f14531764a0e3b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CH7812103560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1611541d37b678a15e8d15fb55ad22289aab86cb3f38d16c4ecbc759845e4730. 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/CH7812194372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592a74fc520572cab72523c008f27a81cb9bae5fc0bf157b4198e4b0a05cf8fa. 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/DEGA22103434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66df6f70c0b4aeb817f64add97fef20ec909112d5f52ba56bd62d5b411036bc. 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/CH7812195262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87d81849d71ecefbed14c7f6b8701bd89ff761123542cdf789f0827d8b215eb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CH7812195263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2dcd24e2ec7867572359ed6d475d212a7c1d843fcea769fa71169f58aafba6a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CH7812195257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e25840dfc4ef1b70c27831db50dc30d729cab4770abd633f8b7718ef558ae35. 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/CH7812195264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b9e93984c73315a1f1063f2a9e44c0c81508223b30124730a858e14d98af5e. 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/CH7812195267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1611541d37b678a15e8d15fb55ad22289aab86cb3f38d16c4ecbc759845e4730. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CH7812194372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0405ee5d9beb3ee5fe67cc035b169e2bce1b594cbf97f60e3719f7ec0d88bd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLRD52119568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143cd4ff5d1c0999d0732cbc00bb677f7d761242d85a5127dce3cc78ab3bcc0c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLRD52304327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce5a71352406b9af731821dde60ee86bcadf25311db32bfe2fc1c82b99d057b. 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/NLRD52304008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb9c0639a6e7cd5c48c7cb72b9101666e8da0f93399a4cba7fd2f08ca67077a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKQU2369014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4ade1fdf62b95ad98174985199f6a3da60ccb64cddcedacf571f93862f63d1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLRD52332926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932c478778810816933b4ed5df1dfac568de415c8fbed62dcc36e2583e6195eb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLRD52304358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e77440dc7b3fa21589c9c53bdd181e6d34c09d4733624bab2073664c9c8b16. 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/NLRD52119544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef6a82b4b3b78916d26e04e64cf2bc2ec4fdda2f3128a27531c3617d2a8af9f. 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/FR2X42262118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85cb2d16f63950d3d5a09d9b154fea231d3353adde9c6769b240537b828be91e. 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/DEKS32100129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca325c7b3be164f61a0090da6c24dde6898bfc6f81cc6f619e37490544e4293. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR26V2066353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629ac5641347e80435846dad339745b23c2fed1b1bde273a8b300df4ffe7e64e. 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/FRX282032415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7fd70c55b2b18690315daf46d23797c80dcc3686c6de6e9103ea884667f2f77. 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/GBKQU2083914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9725c8a23205b774671678edf82f4b636553f89b8b5b90402536f1fc8aac6bc3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NL1AP1940540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb6b8d344605674647912fbd7211685c2fda63b4ebc10140f709bb426da49e6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA5KR1837240.