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 0x406f64526484e534088c82f6a65e27c54bef7a87eea571afe5967a5d7e51c250. 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/aaf4e2e3-2741-4a2e-83ca-7a8cc9109a76.json and https://artists.proofprofile.net/proofs/artist/aaf4e2e3-2741-4a2e-83ca-7a8cc9109a76.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 0x1e1960d27be7d721b5a55956ea9113cb864e90ae5c27bdc9bdf80799c53fa80f. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:47:17Z), 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/RUA1H1525760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a77fbb98c9a891d2e99570a55f008afd9a1545da313e0e9bf89f61dcee701a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AEA0D1875658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433220fc3248179b3398ab679a23265d081af1f6c999fd301cc38cbf474a3eb4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AEA0D1875659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7cd28b4ef1ddfec56c381410c6d5f4161190cf1a5cf484f0ac6dbffdf0b0cc. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AEA0D1875662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6bfd6240fc0cf3c9baa3a79c1b8f14ba23bc9f6abb13333d792bec94920e08. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/AEA0D1875665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d160fb7d9efd706b57d7d162ae73bfa2ca476d4ff76564061518a72fd9de87. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:33:57Z), 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/ATN262094302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86af02488f9cc0a633c40079ce24c2803026ba0a7b176863e36f97a52b61d658. 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/ATN262299913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024e394125352d4b954c1fdfe06cf4bc90070e893197cb4e53300a0502d5e4cb. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/ATN262299902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd14d63bd95c492f6dd81ea12075bfb745f2226330a1969219d5d776ecb8111d. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:52:10Z), 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/ATN262299901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ddfbd6371cb1d7c1799ac1832ecf81eeccc122c9538dc0ddb7f1cfb033bc7f. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/ATN262299907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38caf52cb4e46f480192dab3b21802d03515d41cfbe0d56552a93da5ae36a041. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:46:59Z), 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/ATN262299910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee36409ca871fd98d2b75a78ea47e72caa63ac35d3af16e8a5b7688872cf9bd9. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/ATN262299903.