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 0xf19f97836404c561c6a9d6710a5e77ae3483d25b032b571b13941595fb6e17dd. 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/e46e7853-cdc9-4ece-8c18-f5e6c372b219.json and https://artists.proofprofile.net/proofs/artist/e46e7853-cdc9-4ece-8c18-f5e6c372b219.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 0x7f1d53f17f9abf74ae0c2c26039dcb603b5a9738022d9df9c28fcf019f68c626. 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/USHM90869649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3ee0572a0ecdce5d47bc4825e5fe248e5978cfc19b94387536a22dfba8cfef. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/USHM80856208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c5dbf619733ae21fd01c679a066bb79a8e749df6fdc809c5304c2d535a05de. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USHM80856209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1caf929822dcd8404c1a1a1ea4eadcded8e43d1779eda8c3dedd3034f349ea8a. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/GBLFP1507057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01fd8e98af411c1ff0c63c25eb384bb47b125d9e5d500488342eddfb998f681c. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/GBLFP1507076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db3bd76a9256633d95ba63809366e0472eaa46851cb7f2643a674fcc87940eb. 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/GBLFP1507067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342b74c9c244f2ffd2a14f02c958fbd74f3dbf732b2f0387f0d06bfe5adb10af. 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/GBLFP1507068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed91406d8015763b47cc00d7b9acbaaf1b3330edb7386820550e1a6f44528335. 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/GBLFP1507080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005ebff8a952b88f0b0ff9a317b803db7dbf474b96508801023277db717f953c. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/GBLFP1507083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe792ec0e628c08aed0ebeac5a2fa6e8367d94481e11801120bd3d6b544886fc2. 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/GBMJG2206668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056d80cb7cc6eeca1466f89d489026df138eedf0ae60264be621aede89243870. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/GB94R2400142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae91396403f7f36c59f71967591597f4d3e98d99a667d1a7ac2abda75cf83bfb. 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/GB94R2400144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c3321966a6bd61e51521dbd37933a40f8031c5b4a5e29d5b830d52b984c9e1. 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/GB94R2400145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594ca50fbb6c47e3c770f0a7674fea2020f3f3d0b4f651a80649cb7985bc756c. 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/GB94R2400146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafd926992e837a7f8840c1be3d3a1bc49e20b37778013b7cf8129a7bb688635. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GB94R2400149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972daa9db7b5f90801a3c2f3c0fb46ee1827164d9e3371fc9df2a9fe8effe883. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/GB94R2400150.