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 0x70a3fe238ffc79bd4ce8532fe6b6c167a5e5eb35ab7e96982955702f9b315981. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b63e75eb-c85d-42e6-a18a-f7fcaefa4cc6.json and https://artists.proofprofile.net/proofs/artist/b63e75eb-c85d-42e6-a18a-f7fcaefa4cc6.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 0x6f16af8eeb70815181d99c31053f6048798c565b01f5cc0931ec6260cc4216ee. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:45:04Z), 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/QZRUP2300533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665d9a16c691c3877bd6377271eb56630a3e13637271194e86212b344df1ee28. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZRUP2300775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8ce2e5b636c791f2bd853a30b3c1272151dc72830de6dee06c9382b92c66f7. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:17:15Z), 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/QZRUP2300933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0efe3bd0a5a7d4a4b02bfd96756e83b01396dc0e52f9cc8bc1d6c851428df4. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/QZRUP2400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b1043346925594d570affb3b18434c71d9e95c95d72ff86434d76400af49eb. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZRUP2400152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0687503f591fda388366c3888c8867826335cefe503aae9cb920339adedb0836. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZRUP2400365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd089406ecf2ca526cebb9db96e19f6b2fb8879c5506fb1c245f1e774040d9e9e. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZRUP2400451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ab2d72d70baa9fc5dec4a8f77bbd013f418ba433956824e87934a6cf7d6a6d. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:41:24Z), 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/QZRUP2400506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f5bccd99626207ef4e1341420c789e5893d60452df1e174aa5a582353e25d9. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZRUP2400675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c02c1cd8ab237386d0478dfaaaf30a58ca4029b2a39e22d8bdbb3cfa16f889. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZRUP2500115.