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 0x924ee43fe4c20bba8a21888c0b54d17354eaa51e3817017a859363fef891e1d6. 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/581e7f59-87ca-42c1-bf19-4c1c176d032a.json and https://artists.proofprofile.net/proofs/artist/581e7f59-87ca-42c1-bf19-4c1c176d032a.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 0x23876ece7f74afd997a6178d952a9b507a698d85bf5b387d2427b49694c2992d. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZ5AB1740312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69bb2e501fc577b70c3e2dde86b4b4b2db1535229fa7798d1857dd1b1bd5863f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US7VG1768292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1051200367a484314a7ae4b8ffd258ed1b79f586bb1cae1d6f351a76a8893231. 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/US7VG1768295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa300da77e6b270ac4154164a0c9977231731021216a02d5c271d20130a5b7fda. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZ5AB1703384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21ccc54985799f47e1d975426b724d98417304ffd77f5b9b82f2bcdd690513b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZ5AB1703377.
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 0x86a0856a7211ffe5dd934bcb5d3557fde4cbf0853f65d6b2e22c285a28393cea. 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/QZ5AB2073374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66115712018be8e427174ecd0f1946b3000f20b39baff70ac17125cad8ef5cf7. 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/QZ5AB2073376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d9b3a005e714c87c6e9a0dfdc5401a02f8691098def8b948df99da5b87c918. 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/QZ5AB2073378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306a8d41f528d41b3841f437200fa6fe189dc4ce161445a7844da36382a199d3. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/US7VG1807188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81885954526350a6add90c693f188e94b34a01a30fffcb3df2c0212af7836b7. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:09:10Z), 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/US7VG1837687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf392be7d5d00ac30d1313b8e70c829b5f26b410bc33672805f8c66754c9e0e98. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:50:54Z), 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/US7VG1933737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad3c55fd16ec16b60868edb6e3654c4e2f183936803b69420d5798395b722cb. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:47:24Z), 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/QZNJV2070387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bd26b6c479326e8fbc5cfba87f67d07d05deaf65546fc6740cafd50b6632d8. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZGLM2322469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ddc178858a3cee23340b9058bb473322e9052bb0f00874c239ac75703f297e9. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZGLS2477876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44be12c2f57a5a81f8a447a00de396708dde22ca707a30f5b6fae7a454abd30. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZAPG1881035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e5a227f463d09fb6c90437787059d6cf9fe698e1945727c80c4857e469560d. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZNJY2339695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53bc69482a4aba61d09f50710c2ae53c1ef1bf44ec2f0d59e7d524c05352524b. 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/QZNJY2158712.