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 0xe3b4b991e271120cd532bce0e76dc749a748f9bbd000217a3a361fb1dfd315e7. 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/d040b217-947f-4eff-825f-9d1443918eae.json and https://artists.proofprofile.net/proofs/artist/d040b217-947f-4eff-825f-9d1443918eae.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 0xb0e88d6de3bc4dcd2772b07b2462df161dec0d1d99deffe25896bed268950652. 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/GBCFV0100047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79cae2c040200be60d71ab2ea6e87af6db35de0b10ce60a740e95820c0f1fc1b. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/GBCFV0100048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748009dba2f9caf3ec4bde9cfaa4ffdf03fe63a74593f6b741faeac290adfc3b. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/GBCFV0100054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e8b262b13daebd08e2c4ae3ad9a81e371cf26a15859d7c37cafc225dd185a0. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GBCFV0500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14aa70076ef3b395a2e466bf5ff8bce240a4c88bb2f064efd11f070a2e5992d2. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/GBCFV0500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a849905e8b4e9155adfbc89fd81bcff4ebc71bf382701dc2ef1a904c0fe9493. 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/GBCFV0500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448880e17b0d1864cdb34ccb304969b6f7c5fc4d60de2f465f76435c6926e876. 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/GBCFV0500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe373be8de52ae65641065e73ff71ddace94dcd3ab5a910be108964fc07ac320. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:42:57Z), 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/GBLQT0600101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5fcae0623635704db6110ff82ca874d6d9a52bca6e727101d7cfa3d62e97f44. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GBLQT0600104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe72b435b2c6582433224e99e7dc3d7c4a4cf2da3c25172afea386b1f61e5b1. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:21:00Z), 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/GBLQT0600105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4eb561b46fc0a67db665d79fb11e5e515baecffbafc2186c944b81826b824c5. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/GBLQT0600106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6a37cd62148d0d40e3edb62f64862189497c0e4d589b1443d006bcbf207079. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBLQT2200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ced3df8f7d826e2c7bccfe921047eb4a2b21a62e2d24b2635aef7be275ede8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBLQT2200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c47437ed12cafafb7c7590387a0825774ef9f946d1de1bc4b602ec8cdab8cad. 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/GBLQT2200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a6e20a588285ac547acb28b87397b1a0d5402fe81a67f1fe7d7f88ae813b0e. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/GBLQT2400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6a37cd62148d0d40e3edb62f64862189497c0e4d589b1443d006bcbf207079. 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/GBLQT2200019.