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 0xd670be321571bafc9eb370a06917b3a57b74075ff79541a99267b9fbb89d7270. 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/3c736c54-bd50-4b41-baa2-ae69255540f9.json and https://artists.proofprofile.net/proofs/artist/3c736c54-bd50-4b41-baa2-ae69255540f9.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 0x86f44692387dbd040ced73324bfad4f6391691edae0b591c81f0cffcf3c76162. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/CZA163357359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5588dc0f224e695fcb053d5ad35ff17e2567699a9d533cb8bfd9a27c14987252. 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/CZA163357361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a2fe04be9aff0f9d4bccd0a6ea761714e1af345abd877eb85a3324f764be85. 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/CZA163357376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06fea367829ee7b4399540c96bb4f30e4a80facc85218f6d2646f45efdb15140. 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/CZA163357380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5645eca0d842428ad3b5d77012e71f9a94c5e07bcab68e7a32c45ee70c29f0a. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/CZA163357386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad723c67dc6c3c423436b537e1ce75a1ce253099666d48514538ecbb247f01c. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CZA163354627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d12cb3c80272878f078fce9351a4292faf7ca758bfcf82c4bf76d4a510651f. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/CZA163367726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66136f624ac0a1fde8266b81db51dbf3b0d4b86d1cf35b433313e603cedf60ad. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/CZA163367729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db70c35cc0886f034b203217d0aceead29d86e9367c416c08cbd5632289a34e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CZA163367731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5ee186f27dde6abaff7c6e60173160316386c4beb1cbfa6112341ae024292a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CZA163367734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0cb0143372cd0cb751947a7289715248676da5def8a922e4cbcd941cb6ed7a6. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/CZA163367738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f7896bd3437dbbb2247027464c02fce4b9a64a217a06bd5399b46523c6097f. 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/QZMEM2216081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aab06eaec502b71b0208872a6a7a4d5494bda7e5fbbe45611b73225722c3599. 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/QZMEM2216083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6fae33f284005c7ef9e61c0fa3301a257a2e7a1af416893f24904ab84dfa26. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZMEM2216089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2532164352a5f7b46730bde7cafc1cda19a7b78e9b83df776b17bf83bdce3f45. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZK6K2284831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9752d9f07cf0aafc3dfe2c9fbe73cd4dbb3df1b747b8159624bcb92a1be2ab85. 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/QZMEM2216091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd567a01b5c8b58e47501b186891d5f7bad802dc30f22492662bfe7b45399cd. 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/QT3EZ2443569.