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 0x60e95edd10cdbc13512660a6cd7c39bc3b3300f5213e9b27b444b084061d6d89. 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/e3fc792b-07d1-404e-add2-a091a0329b10.json and https://artists.proofprofile.net/proofs/artist/e3fc792b-07d1-404e-add2-a091a0329b10.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 0x5a6ebd07f8d867e5059e5ccdb76bfbfeaf5792018267ed004eb75718fffbd6d4. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/GBSMU7370696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd1d0b03bf004b002e92cbd91ac4259131ae4972c33dfe7e4ce25beb14fd9c4. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/GBSMU7370698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c661e4d124c0a6ca0a215c77368a7085dc9192d3e49c4fb7802205632c9aaf. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/GBSMU7370700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242563814f8c34fec962bbc8279153d0f5ccbcf6a03f0f44404e89d160b50abd. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBSMU7370702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf27c68654beb4712bb9d6eb3f2873f9386727d5b5fe7e088b2c161b3cee165. 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/GBSMU7370703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e30fd8ca65165509b9a9f46b66efba54d2221698deebd680b52649af4a7cccb. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/GBSMU7370704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8040068911e8f61ade396023be98c9c423f79f1fd90b9202c75f90196737494b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GBSMU8710359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28b473df205f8257942251df6840aa73d61338701e7c921855de61116733f7d. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/GBSMU8710361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d546503de105df76461179a4442cfc4fdb59c9f9fba2b34f1c4e7bf863317d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBSMU8710362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b82e133952c077aac6fd1e0f80f045eeb81b5887e9f0eb5fe75832be35a7c8. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/GBSMU8710364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfebca361b677cac2b68a35e3df479951d467667b9a45e4b86b5a0627ca2f96e. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GBSMU8710365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80617b2fcd5e743969ce7c1b0c771ea0fba04d336931ec1a59c7499f1a75876. 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/GBSMU8710366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8845112a632880accb27f2fe97eefa4c0f5f973f35ee81ff4900868dd15aa9a. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GBSMU8710368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5805d9fc55e8dfbb3e76462f8d9f759c139a2e2f4c0997f67f47a3e7f3d13760. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/GBSMU9829687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb327b90f71ac516bb16f6e83adab126599abdf632d6ebaeb8e825f84e4046d36. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/GBSMU9829689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845affa87b97eb8a81a7b32265cc5f4e9e3fb87c677ae899e17e44bf5530154f. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GBSMU9829691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0758b9344f506341a7d596bd0c70ccfd430b7d9dd6b1f451c11a07bcb4aed762. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/GBSMU9829692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e2d042f7b309ac61c9d3859d59ffc010b71631bafefb3918a1545f62f1fa1a. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/GBSMU9829694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43408b59b1dba5ff5a9bd46ba8b85c942d407115a528469e8fa86fd3eb00a7c. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/GBSMU9829695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ea8dc346c0fa73698cb8e1729cb80f7e69ff92e0124ae2b383d1433a6b1ff6. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/GBSMU9829696.