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 0x55c75ece32c7793a04789ccdfe57b7e39bd3a9e7a883425ed62eb0cd8169cd96. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b038f30-2f5d-421d-aacc-db826cb46dfc.json and https://artists.proofprofile.net/proofs/artist/5b038f30-2f5d-421d-aacc-db826cb46dfc.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 0x2fa296d76646e78ceb9f0db4e84a4e9dafb418f249d3ecc632131279ec465867. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:56:58Z), 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/ZAC012201219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a80408d63366713d0204189075800bfd6843d94f1a9e7e61c2c96e3716a862. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ZAC012201619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498f148abc71b10a43e6685d37352396e79ce33d1e730d24d3427da3ea376b15. 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/ZAC012300731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217066d10ebb569bff9b3bc295042de4a88a58d8e84676290d807e9973878620. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/ZAC012300732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f932c5f3e3db7147a9010978154b7c1ec51cf999f817c6c7aee660269998e65. 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/ZAC012300733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9d6aa3c92036fb6438566dda800683a65a81dc44c67cb20f98751b0b936eaa. 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/ZAC012301247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869a523591922a2a9eaffb457181b6c8fcaaa41b2290c80393249ab747640c77. 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/ZAC012401276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e08d9b51aff8ccab326712ba201bc749c6f800899061b77f88bf1730ebff34. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ZAC012401277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3b80a3ca1e25d532f75d9f4dec5433e571124b3b483dc45f23b264f34c8172. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ZAC012401278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4517ac60293d1638a0ac4ab35ed0cf5038c2c4b3063df18c0b7a029d3a63d0cf. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ZAC012401279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ccfe170c1f3c176fa0e424684038e651469e0504ecc01c41e62367b9374b0d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ZAC012401281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d70ef82167e6c6c93e2817c5d4929e59bdb47bf00a395a45557af688fd1421f. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/ZAC012401280.
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 0xde6456aea1542622bc439cac6abad66c225925d549ea95ea5d34d4b759d9f148. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZBCKG2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7226225fa1a9d2085ad05c3a2f44607087b70ff19de1d539ed9f0f0a110596. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZBCKG2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb29d7f2872b2c0adef34afb562d16bed8bcce95cfaf71ea301a573b2289637. 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/ZBCKG2300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0cd8abc810240269c1ebd4b792f86a3d7d85c3dbe35c57f6d44917e39b96908. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWDW2484236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b4d7ad1eb0c6e742e435ed68f96d66a1c72d4766712ea3a602feca61dfd7b0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ZA6EE2000068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1e8778d884633f21ba80065b9d9fcbbe8e16d7a93e01c9d43744442a9a6376. 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/ZBCKG2200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545a9fdb05fddfd76f5b7410e81d5576cc81320b877dc215810ce22af9542dc4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ZBU4P2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b07c80dff1fe344b3eea3c1f85e71deaa6ba3bf191d91a801d0fe84251d826. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZA6EE2000055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6180ae4105797a50e930178fc6c23dda19c6668937795582e01f01624c825a1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZA6EE2000056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2918b02193ea8e22ab99477ead58200e930eec5c4b6fcd8c268e5ade2e5a08. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZA6EE2000057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35a7655538f488d32c9e2b2f6fc8fef74580b284116da00fa3151bc58f99d6d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ZA6EE2000058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c9c743e30dcb9778ed6748af29f6e8f33e5bebd4d2eeb0a29da27e41e986e2. 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/ZA6EE2000062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a740626d9f11e0d7566eb042173cc773e11e6c3ccaa54b1cf7d1d31be21e9a7. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ZA6EE2000066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748228aa15df6e7a42ac58fd0e67762d88415a7efa64fdd692712ba8dc15bddb. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/ZA6EE2000060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d630d88a3f5a960186651e1a6b5292132c7ae5e2223277f491522051a0cb594. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ZA6EE2000072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6222a4c377dba7dafe2bd497d0629de15d83b8c2a7102331cd2012d2e53a0c6. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/ZA6EE2000063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1bb0a0cab296e2cb593ee789a4895da3a8ae9eb1624ae678eb2e1062f3ddfa. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/ZA6EE2000070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9e74cffb2a6ab55897e03d18b7561d64c667b0993ed25b3396fd57959a7450. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/ZAC012300325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c0697bf3a177311db56e6aacc744408d25083fc9cd37e8207ac9c830581fa3. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/ZAC012200695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36e5b1d6712c9e02b865ebc4a21d8f16c0aa8527ac5b30530bed630706781e4. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ZAC012300891.