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 0xe3b0e340ac0c314563a4c548d1e4d67a58f245a592751388576292dddb9160e1. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e84e63a9-1bef-45f4-bd5d-9f4b30e84b2c.json and https://artists.proofprofile.net/proofs/artist/e84e63a9-1bef-45f4-bd5d-9f4b30e84b2c.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 0xf74c098aecda5e06fe9b1ea9a3eba768b47702a1e41e8bc7c94ec1c261e529f6. 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/FRIDO2311222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75facf8c919bac1c64a750d979a9f9e54c18b00ca61ced6fea56d146a1c5f3ff. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/FRIDO2311224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3253f1e660cce0aa33643991f56e751b0edf41ddf5a9638f16f495dc4edae88a. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FRIDO2311219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82156da946163204383776c5a1a5d85ce9c7dc6b087b3f37100fb011cae5ae24. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FRIDO2311218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4d4267f9ddee9876980ac427af1cbe6a32fd8adf96b7351447bbf5f848f805. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/FRIDO2311214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f2d80324089b21cbf097bbd617191f4c70af712fee42905d1a41fb8dd09d6e. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FRIDO2311217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be02521700231f422d43b3752657e0acb88557c9e194e1c3aba4cd75addfdd3. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FRIDO2311220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e781ae2da518ddde1795159631e0c006551daaa1f951553a301111b29f46ee. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FRIDO2311221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a851a2e61ba7a15facd274e366510f382f360269d541a72a3bcb3a1c12187c. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/FRIDO2311225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf41490e9b9164fdac3c327e9e0d37f3b4682f42bd352ac98639d8426dc58e6a. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/NZRI12004127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d4a45d8c16336fe6ad73f95005cec2aecfbff7db5da587c4518f87f6dd6f09. 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/NZRI12004128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe51cfd707a868075312156dbccaa1f4cd1a12745062009b2a24abb0a8583bb1. 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/NZRI12004129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925b1dac8f5ab59cc81b57afbbc1b60b91912a9ab12d96daa02d96a2c71f6cf5. 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/NZRI12004130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f245cdfab363cc7c9b5f7f27aca16beab3c6cce45667dfcd227c0d4476e34ec. 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/NZRI12004131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75facf8c919bac1c64a750d979a9f9e54c18b00ca61ced6fea56d146a1c5f3ff. 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/FRIDO2311224.