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 0x18524e2700397ddd81743bf54efbab540609e5ea57cb31d53879d7867348cbfd. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e845d995-f2b4-41b4-b3d8-bb0a727d6c7f.json and https://artists.proofprofile.net/proofs/artist/e845d995-f2b4-41b4-b3d8-bb0a727d6c7f.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 0x0a78a7f7bb8ead98763c91f9e71f761179b303f3ab8140096128e0ec282a2247. 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/QZNWV2313917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa154219a6e9d154ff984aee127168fae0f82b1954061829a6a6a237e83451b. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZNWV2313915.
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 0x4c64b7ef921499ec5fa12954b1f8b9af21f1e4e6481f32d76bd7a4f154b13da8. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZK6K2312317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608e43f82056409bf9897056d8ee78acb446ef79d964f1521d654810a284f512. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZK6K2312314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc890e166c36407552cfc709cfdcf7e592636e8346da06589e52b080aa4bb80bf. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZK6K2312315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb36a8113d8c8b1fb50bc16c3aa57f56d57efa82827412533991c44676ff2a8. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZK6K2312318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162475b690712ec7e2e5d626d5c9cd45be2fe640e2f347fc66804796052d2f57. 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/QZHNA2196580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e3de6a877bf9ca3e7d390b022958245f56924729a15da023a681cfb02b7bec. 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/QZHNA2196581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb95f0eb0d3601ec02e75106c16c96593e97b14250c4aaf14d942c864b7c6542. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHNA2196585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e063ca7f7f13ed4bd4c695d46a2df7e7abd554b976fa7232f234c75574212e. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T17:32:04Z), 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/QZHNA2196576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd87de43e37d7f2167782cbf02a5720f3147c5d9b170ffd6efe062cefc0c2bf2. 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/QZHNA2196577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45e2d4d809950133e8ea680e49de88ba7273d68dec43cd01e4f24304cc69022. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZHNA2196578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb066a1020de495462dcd8e5143b80cd197488b56e416c481b1a1eac19c68dd. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZHNA2196579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24af1ab73676c4d2547bf10a04639e746105ebbea219818da9b4d1663cf2a22b. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZHNA2196582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1e22e012df96a470c814e6f4f2832fcc0fa91e69a42ad391cfb6f947397061. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZHNA2196583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd168d1e92752bf77e18c201825e582ccfe0e887e5aa9318fac6f23423aaea0. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZHNA2196584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9afc87422c9f47e77723c01f66bb974f2e5dbadf8a06564f3da918fbb6d9d818. 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/QZHNA2196586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74daf7a89d27201c63e35ba145f35f6a6b0acb8d44e89ce7e82e1a48df9aaa71. 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/QZNWR2051149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe026891b9fc6585654b19d51717801239a4c9cfd97fa7730bcb964bfa43e2916. 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/QZK6Q2225676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d69f26eca7ae33dc83336090fef6dc9d7f8cc03d2d5706a0f992c9529c8e719. 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/QZHN82266785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b50d52ce95dace2e45e35ea9ebe9310e2a20a005a733b3b0e42b49aeee5899f. 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/QZHN82266786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f3c4147840ef36b85c9237be66a7a9a98f41ca2ebd6f1508f11f0ebe0adf84. 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/QZHN82266787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334634f5201c75eaa3f4f10f8bb3bc537a57cd87d7b1fde56f4080a7449d15d4. 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/QZHN82266788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75b7b630804381444844fdd3490e4e1e915d584ed05314e345c2bced7247df0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHN82266789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f73906f664cfadcca0abe4e67d331c79dac20361e0dfa6a5ef60c046c48d2c. 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/QZHN82266790.