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 0xba0a095e1c570aaa8def12db06427ed718572d56be167a4ef389cbe21ca0e9cb. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dacb9d3c-09dc-40da-b477-d1357d5fd2d0.json and https://artists.proofprofile.net/proofs/artist/dacb9d3c-09dc-40da-b477-d1357d5fd2d0.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 0x2cdcb8797ba38bcc8e398949cd57e0451d767a837dbc394704f5d46eb33baca9. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/TCABJ1212902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828546ed707460f32bd12c74e501f70a7263696421a3c2c3266b7dceb6e5d64b. 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/QZHNA2127748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16e774fa2c8a22e44d3a98e3e3ea068eacdc022d933330d477db02970c80590. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZHNA2145513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4fb74b6f8205c350d4be7e000fd34c00e29020a7858b2383a0f5f258d47d951. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZK6L2150916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce987bb8bf4ce8835e498e098bebbbadb65f1a996856e6122a7adfe007124410. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6K2155070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771f7024f253b4a90d2a7c4fd3c6068d3962a6cc8d5ac7ebb123ae65650ed826. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/QZK6H2119042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4199c74f0b09fa943c2cb72183764dd6ddc2eddcf2514804a4b5d5167b20a037. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZK6H2122630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1cb57ae5659e7e4427f89e9e3e82bac97c3824103d823cd1ff39d6512f2648. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZK6F2129541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81052f73cc22de05b57db0ae042545203216d451540815a58ed6872a615c0f1c. 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/QZMEM2142064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7b6a11b95561ad2c66da8c1df3b1e9bedf0c2bc3f8045a1d4219670e2537c8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNWV2180019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf741a30db4310451442fc1e8ea0dbdfe4a6368b51938e9db9e75c56b2077c770. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZNWY2145593.
You Took the Words Right Out of My Heart
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3479b19d774f018a96b91fc85d2008a426c1d20c213d7b9d1f44473b73541263. 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/QZES92228566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c3c216f064b78b2491272ef7eb664ca16645c4e5ffb942443374a70761e8f6. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZK6P2246233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ece896bd387ced4fa0d9cda836b54d692ae29daefdd6aadcecaed1d0dfc50fc. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZK6N2285251.