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 0x4673e63ecd0a5ae3d9d0a9c3fad6b369652b0a7d6a851656902453788ed9fa53. 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/88aa6344-6ee7-41a2-9c3a-ec5edc745d7e.json and https://artists.proofprofile.net/proofs/artist/88aa6344-6ee7-41a2-9c3a-ec5edc745d7e.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 0x8afbecab3b55207aeea63f13dbaea59718d95357281e495305a69f9a1d8b1c1c. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/GBLPF6773969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e510332a78d3f819c00040a2512d7bf1e59d2549971e4e08ba2b4a05a435c48. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/GBLPF6773970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab91e771733c2e1bd3394ff0c0c7517be2d8e0f265d4dfad6e9cb2e6228c803. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GBLPF6773972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7c8789163b052ee6d4076a73562421e37890ee644c9b9c0b5a8f235bf386f8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBLPF6773973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957f6cbccab9a3e185b791e3d170dc022bfc327e8fccce131025ab1a00a0ba54. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBLPF6773974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a534e6dc7df1cd8228cb44d9d0e3755fe19426bf77156ae7104e6297661435. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/GBLPF6773975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa32dccb1b63e5d967ab25c04622cfa1aba7615bf757b44abc4adf6e53f8637e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBLPF6773976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14569ea3455e5194626dbe8eb8ae3dcf4c2a79f9607d89bafd701c76ffb0532. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBLPF6773977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c224b4092371fc2adfed65c9897b5a45bf10ffc2c1cbd7a4170a6f59a4a669. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GBLPF6780586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b1376169daa23a1dd8b82d194832bb5a5b46901d1aefc5c50a099924f9577e. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/GBLPF6780588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5a5c9e75770ff9b14771aba4c48c413b780cae076842041a994ffcea5b263f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBLPF6807344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9a4e413b78566f262841332e2ad33eda0f178e10e31a30aef29625fc7279c3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBLPF6807345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774c294ffbecb3560013619f6f6105e548e354040a9712ee9491ec7b2269e217. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/GBLPF6811166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ac24c9a7f4ba2cada444e9c0914adbe351ed728e077d0f9837da1c27312e3e. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/GBLPF6811170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692b80aaaba488129dae08ecbf6408e9205c334c75c452c3d43e2e3e0e5b36df. 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/GBLPF6811175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe906e76e65f6d4692861d23fd6255cc2a779ea3aa5ea66e03e632990b93c3d74. 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/TCAGI2229363.