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 0x5445638a3e846ad2d84aca8c2b710e7e645ae040ca635ce63761b14591a99ef3. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e83fb9f-dec8-4b5d-8a29-b9ca4b8baee3.json and https://artists.proofprofile.net/proofs/artist/8e83fb9f-dec8-4b5d-8a29-b9ca4b8baee3.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 0xf60632b196b5719981be0ea91a9354b40e47a76e5c237b7c76f99bcd110e55b6. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZNWU2051267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608187aab15a75392171dabcb688e45082e3a0cce0971d9069bec72282d209e8. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:36:41Z), 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/QZMEN2296183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5841b5db4a76a3dfa260066328eeea6146fc528570ff240096dd8550f5b76141. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDA62291536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473d80d1053d6b1965978f4fc15f7c172bb9ae12ea84e562ae788fc13062f50d. 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/QZES52215108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2089ec440051c9b29e23ad2d45e530f66a1e05aa547b4488b4f97b54aaa5a747. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:49:28Z), 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/QZMER2241705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101b1866069d9ad2703453ebbc67dd2f36d88ce3d5ea0f4057182a636e7471c8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6Q2252807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5025e9c51a50250fbb19ec6c33f0910243aad711a3c138496ef867a11781ac0c. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:46:40Z), 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/QZNWS2364266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7436c723070fbb737ea823fb665ed4065d9b9deb59a9b37069df30ca1bba0c3. 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/QZTAU2379904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7619a8a50b35464e1adb95b53d476609d79636af72721dc294df9a200fb7333e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZVEM1851747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd300e5e7d725272f6823f666db69c35c21ad951a1a09e3b9533da35390816f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZVEM2551644.