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 0xc1706f4504a59f5370b4a26beb50d9761fd5cf30e8340f545f92f64cc1f733aa. 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/774c8812-ce29-4ad2-ab01-7e8ead29de4d.json and https://artists.proofprofile.net/proofs/artist/774c8812-ce29-4ad2-ab01-7e8ead29de4d.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 0xd1a6e5435641e89ed9172f3ac5ac7c2dcc8a62b91ce594b9ca99f3a4d6aae7d5. 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/QZES81892881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c259040c6c66ca1c04814cef5c510b975950f97d6da2286e9e83d64153b3782. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZ8LD1907071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e3d75062527d841eab6420cf7afdec110932baaa750caf569477c4718798db. 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/QZDA71995125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98544da83ae0e535516607904e51cffc614ecbfeaaeb9bfe4e130efec128ff39. 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/QZDA71995888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368a9741e8be6aecdec1405c4306a7b1d36666383fc01490fde7469cc59231c7. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:54:20Z), 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/QZHN51929006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16984a7991a5492cdcc5e8f648d324ea11afecc041108633f4ec342dc9dd4a19. 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/QZFZ62004935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555a0cb2a094847828aecdc2203873f5256bfd898488868be1f83a10f46c2615. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZAKB2004045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28aa01e45b7bab8ef1723d1640db603f73a56ecdf5c50f09197549cf6f6ff41e. 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/QZK6N2064527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5ecfd54f774df21a105a71c2cce1fa960f47d29a12c2c353a2ea30529e826a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/NL1LE2000844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf768f216667f55740c3ab583b8384f9ccd9d8ca0e46ce22b47a8995773b8a71f. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:55:33Z), 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/NL1LE2000845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe730ff62da2da5245bcdd9be85f19cd36b6f513c7a1f3b836ccb6bde883954f5. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:28:29Z), 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/QZES92119435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae67a774364792aa9575a3c158083ae5c7cf418191f6effc671f743e7689418. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZES92119437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452a7e191dadc874b7ae1f6a1bad4a9678551a804290ed5bc37833ef60c4fa6d. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QM24S2206433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52bbcd297127afc9b3af7b8793a620e72e1a50632c5fa08939b15aa827afa195. 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/SEYOK1844783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2cf6784762b199cc6f6b7be5ed84f2b8f9016ff7779a4024eceed5a0d369f76. 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/QM24S1805872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5fcbe88a57a62b924a865b913f98ffdcc453740876e4bbf0b36c5043c39d3c. 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/QM24S1846144.