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 0x5bd5c3e806866b1a1617850f02e407f6b2fb08f451af15ab0cbf7c7ba1773d6f. 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/1d3189a3-196c-4afe-8771-fb6c6482a4b0.json and https://artists.proofprofile.net/proofs/artist/1d3189a3-196c-4afe-8771-fb6c6482a4b0.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 0x2848fa273f051b35b4c232a76fcb83fe7a00ff846c5e6b68babf5a10047ed58d. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/DEH742225407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314ded1e8c6c7a1d42412e8bf6d8812011a88788a3b5c5ae5f036c7844ae63ee. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBJX32378004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42221c71c522c0659a4ae35e74ed66b82eb9466993482219125d5f2cd2ca1117. 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/GBJX32378006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd133b0895f5eb115545d8485a7a5cf13b1fdf18085e15cd5b638d4ccc42aa00. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/DEH742306207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b49d79329479be07e71a5779634260427ac2981f777c63101111f21a0626b4. 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/QMSL32400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5763cc927ce5501373e59a147e5472e74dba80f4f8d9393f287c15d612ed812. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/DEH742420004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961673b68a168a79478837fd89bf56e6ea63ec2edb7e63d48334508d8703a50a. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/DEH742420007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0f85cc4b2171fb68c8d46c93481ab1400e69feb19364585fc2f64752242f48. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/DEH742430329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1a3353995eb26bf8cdda61478831c7fbdd6c61065a4ec9d136f106bf3d0617. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/DEH742430331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe864dbc4d6e70ed47bf68de96bfcd609e8d79cafe0eaccb3e0540ae220477c23. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/DEH742431074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c5e3c0f9f68c65ca3a08fa52e0e772d497a01ef05e8559ccb5d0530bdb8420. 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/DEH742504650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40e7d0f49bdd3b64f5bf9ba967b05f835a8a75f89fa743e6ef8b92e98ac781f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEH742510822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31edf66a157200e4253b86dcbdf7281de5d4918274f2f82c1a3ebca21f310cc. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/DEH742515514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83f9c92685669d83f2158329e1d8f8111a3c7c03a593a8e90353a8cc735bcdb. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/DEH742045246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9432bad230bdf58b207538338f21790ad446bdbfd2df825c0d4ac64b30b79a4. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEH742334392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de3cef2151a576716b913816e73ffe310ebad2b7baa98271cd95eda0ab7bb83. 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/DEH742334393.