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 0x484220994d5d1c4a8e9fe92fd072b0a798cf0380ab8e468d2377687de1f9394c. 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/39dcd35b-e09e-4c72-8e2c-897849c67a6a.json and https://artists.proofprofile.net/proofs/artist/39dcd35b-e09e-4c72-8e2c-897849c67a6a.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 0x3e0cc630eeae4c05c1538d00d0744fdc50ef3792abf4a4482066c105864be295. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/ES5161804750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8b5f7e792c36bad8456f076c667b6e5347c73e6901509e39b216e48bf8e830. 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/ES5161804752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd4880c1bb01b89312b09a5e963b99e175e59fbf5c09ad788f3ff9fe68a7845. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ES5161804753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93deb055e267096915b7f9cb51f978b6eb02cd311bd24f9d2e936ebe6b6194c. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ES5161804757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9780b8fb21d5388aba0671ee2d866e876edce1e1f626f9c56f70adfb3ca31ad6. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:59:30Z), 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/ES5161804760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c0198f0868172149cb2ae5c9ccacb794fdb4e136abc6ac8a8aae3e732c0aed. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ES5161904897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6095effbca2e5380666367c6307168e29c2f5d2cd895bed76e619ae520cdab. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ES5161904898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa394644e948d428c50a2c82e392a22962e464c7569e3892caa07d2fe4b16d916. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ES5161904905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e3a483a21cc07c8f8e7af00632db2141a6b26da647c308767f31fc0e667ac6. 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/ES5162006376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1747646bb09125c24b4ced8b7f6d102a467cccbf3e6c8040bf06488088ed453f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ES5162006381.