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 0xa872ed545bff96b0a6a4afebcd3db696104dd72ed0f91e3793ffb6396c009117. 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/53f693c4-5ca1-4484-a285-3207de13f303.json and https://artists.proofprofile.net/proofs/artist/53f693c4-5ca1-4484-a285-3207de13f303.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 0xf8d237caa47b5e2b4c126b395cf2a0ad2bf38050dde2fac09bfefd9bb33f3e40. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/GBENL2103076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e79ab4e84753aa0fc2f68513402d5fcbf8009a3d9d1350b7e145f6df7d82a8. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/USBQU2300084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b8b90dde4e8e67cdeaa6815f9604678de2a96e38a0f6fe3f94208e0a408272. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/USBQU2300181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4426cb151e93d5c85fc01cd17e30ecffefd651ef3d5ad6b80fff7cff5f4a7775. 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/USBQU2200186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c533f96bdd483058a11eeef24c0333132464b761c7d69421392b7fc1e789b44. 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/USBQU2200171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0104d9646a9478af95fc9a9ff113735a86d3db9f57b0f32331a32d5b7a18cee. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USBQU2200184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4234d8e96c54d8fcda800c8bfb8fe75213235d9c4bec1c411ce3b2f73c973f. 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/USBQU2200183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d07501d95ab927459540815845b1906a4069b6335b1239a07f100de12cc84b. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:58:43Z), 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/USBQU2200182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c19903b007e38c10c17ef052e1878ddd7bad6e93d5e2fc70379525a2c19eee. 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/USBQU2400133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791d776355bf0e894ea319f1c2a74a13e29fe3f97cc1837a813083d06910a015. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USBQU2400129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce16e34c65e2bf3a0180808a0806bdf693bd59ce0029bf61803580ee841a1184. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/USBQU2400132.