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 0x7fe065a6b6a096f511601250424ee0db3d9ebbd8703a6ce18e45b5eda4b51c27. 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/4494de18-111d-4f63-ba4a-afb5e4596828.json and https://artists.proofprofile.net/proofs/artist/4494de18-111d-4f63-ba4a-afb5e4596828.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 0x85ee73cc3230906a2d6980d1e223ec438b89483d0feed41a2d38c2c5d8d1baee. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/GBE3A2019003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9fa2adfa114c363ccfdc73dd7d51a783743c62ef28744ae2d556c99189cf391. 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/GBFSF1801906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd3fcf14f85de527b976c93d0e0f24c9ba3de30385c755ffd6134892b1efbd3. 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/GBFSF1801908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c79470f45cf1555a819c5900048af4d2d4c9dfd1d7e025d3d40327dfae54d2. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GBFSF1801909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0544ecc7729c2745a8f7885d2ee9b7932c6f9f66a23b46f4afe0306aee5e2c. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/GBFSF1801910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1259bc1735dc07e2d2b020fa9563123db5b4336a4a6a313bea40d6bc60c4f7bd. 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/GBFSF1801911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0976eede937d2276a3c2153f58b988122feccab0e9989e874e9fd8820b97474. 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/GBFSF1801912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9b907270bc88584d47ff879739c14d198e30be76b6db1ba02012ec083cdee5. 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/GBFSF1801914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f022e24145fb6de7c4d33e6841f19ce2709d244d13d844b523282fb6227c93. 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/GBFSF1801916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a636c993e425f9f6301e66f52a58c4e8f264acc7aecc1cdfd88b0263f85f69. 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/GBFSF1801919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149bb9ffece32eb0854b61a64286551a82968bf68fc241b041f507d3b7c96b90. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBE3A1407601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f1b45d2244e0637543ab91b28418917960cbf5082f2929ea1ccb48be560fb0. 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/GBE3A1407603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b20bd9b19a1cee9df4282b4b224fd268cb9c7cc5d1ae2b8a837cfe25f382b67. 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/GBE3A1407606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3262da6fc95138c8c95bd8f13c3678cc377b273feaf01ce21c680e20db968179. 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/GBBPP1649830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fe629008b5dd1e66b4abe85a96b8ffb9e23d0907afedb9d1a937333d5460e1. 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/GBBPP1649833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c373fe011415a833b340ed338c371ee84e5158d052f1fbee4c27967c862c93. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/GBE3A1305623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8235ca08bc8dbcff0ca78a48f74fb490820029d5d7e43f0ac35615117b409afb. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/GBE3A2225204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19be4ec70ca456c0e7fcbb649b799159e6e670223f40806029974c1852858a97. 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/GBE3A2225205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683a8434480c07727d1c32e4797cbc56ceee5660e5379156bf5f93afc4ea4f49. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/GBFSF1600284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0d2edc119969dc5f44dd9376e41afd0acd297846b3affad0587230356d0edb. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/GBFSF1600289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16e5bc38e0b18e5ae46e10919917b160c7a0f46b4f57f991a52722c4d7463a2. 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/GBFSF1600290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f3f9e41e1069670e90f32cfcf0dc65a16959d8996549c6e04473657e6ec53c. 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/GBFPN0918403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b10f83f4d811ecbe9e4a10194311edd77c913f813cf1d80bc9816e0910ba57. 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/GBFPN0712405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151e15cf77bb6ce4ad1f26af8c3619a1831b79657fab2ce15cc9ae3dc78e74a7. 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/GBFPN0919201.