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 0x24fe175b89670d5626afe65a193e555afba0337049a65d3d0073ea935ecef59c. 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/01865057-7b11-44fd-96a0-cbf69178b697.json and https://artists.proofprofile.net/proofs/artist/01865057-7b11-44fd-96a0-cbf69178b697.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 0xad859c14660a280d01ac61b92f0fa56db2ab598aa8a1a4c861b8f597ec0e492e. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/CAGOO2487752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255a8dbee6a212c69c07b4262a0cdf8ef8105ce43c7c1c078d3d2ca4de4ba4c9. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:29:16Z), 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/CAGOO2487754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfab0c66ad3d32acf7313a6207d08b5f40ac7e99be1c768476ba1822fb5d46f1. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CAGOO2487755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0772f8e15ddc58f93ba0e5da40fed39ee606bc60a3a569b5d1f3968771091554. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T11:23:15Z), 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/CALVP2447330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a3d5f0549e17937adb67f9cc504a2bbfbc3a15e06c2c652ccbb8684f25c77e. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/CBEYJ2475831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4868b55ad5ed86455597db8748ed440fdf162599313cf2932f742c9d3290dd. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CBEYJ2475833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf4c744a92bd730a0bf53866e32286db4cafaa183474545fce0e605d958a27d. 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/CBEYJ2475834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4c9735e69fb9a88aa436dd28166b0d2d66157e48a95aa35f1cc7327a461b95. 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/CAHQJ2552771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2689951c0e07ab41ef9575af5391dbae8b4489d1d0569618befe278640527deb. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/CAHQJ2552772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a18aab313b0c6ab9df4d6efbf701d3f68849a57da4d2113059935d5d27fa36d. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/CAHQJ2552773.