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 0xe17cfc8d8a75157ce165a740b43537f2a77fac5c4c78bfb446c298ba14a9bbec. 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/731635a3-5fdc-4d86-bd07-dcd748615456.json and https://artists.proofprofile.net/proofs/artist/731635a3-5fdc-4d86-bd07-dcd748615456.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 0xffb395c196ce7cbd44da82f3d0eaffdd33a7a7e0c6ef449bcbad824cc416c98a. 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/SE4U92001001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda769b66f8041240c4fc5f3d1b92e306ebcb89c35376aa429b8b6969648d1d12. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/SE4U92001003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02dcdb95fde91fe87901a4ee77cba9616221192dcd0c8b6025da9304e707f0d. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/SE4U92001005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982c5a098a0a17c370c39ba2dd8574b4ddbb810da996ed05fc3d583ecde7c5ce. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:51:23Z), 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/SE4U92001006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649b430ab2f6467d0bb440d1deb759fb5bf0d5e5d03d932f157d597eba64b2d5. 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/SE4U92001008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013543434da30905ed88c1bcd793d07b561402567c3180c4ab137da9ae3c974a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/SE4U92001011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39696ea4619b008bf0f4f7367ad034d55b677634eb16364fc07dcbbf8ea45153. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SE4U92001012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8b26f3523b646144da0fad14fa3acfeb2d9c74053e04742655831845def15d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SE4U92001013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0013fb287f3c99ef2218456d63f852db3f9e5e8664a4ba6b68dc4384ea843d1. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/SE4U92001014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61004a9a185acfcbb8b73d8a1dc52f417230fbf0716b244b7da9806bbfeeaa72. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:29:00Z), 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/SE4U92001019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe2414b46a1e63af44376026401a778e9c7524b987eaf19d463cb3371cf679d. 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/SE4U92001027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ecd61e3f5cce0d75fa4eb925fdf6bbccedc104ad29a5ff6511d04062b458fc. 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/SE4U92001034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ffc0231574cb4ece5c1fd1d56c859be9ee579014a0b7255b46bf329bf7ec643. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/SE4U92003101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5401a912025fffb2c12ae152f4b93ff9e1091bc023ef4f79b9c32d1befc0b638. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/SE4U92101102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996de0b8075d560bb5d5ff2e492a6fd045f06da9279497e93666a79570a52974. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:09:46Z), 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/SE4U92101505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c4f802bceebfa453371bcdbae911e9e4ae96d760bcccb8e3b62ec593930e62. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/SE4U92102201.