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 0x9097d06e08e02faf0e5c74fd9e58e5d41156f89ac9043bb8ca905627d48497e8. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b492a09a-204f-4603-bf8f-ce22353dfb23.json and https://artists.proofprofile.net/proofs/artist/b492a09a-204f-4603-bf8f-ce22353dfb23.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 0xbbad670a33437bd52e861ca39f9924ea1cf98f83de9c866e0c152d4f8dcca6cd. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZTBD2547409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe892064188c56627c2229979d3414c98696d5857fed1f4180cc0a8523a4e9f31. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:58:42Z), 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/QZTBD2594846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8cf3bdc34e3a6d7b8aa983f80a80270657ba88501a31fce9a593617d2a5135c. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZTBD2567983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f176ca0b52379148d77bf73d980fedf09c3b639af025c75ad9459809e4aaba. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:22:44Z), 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/QZTBD2592478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea788b27b002fefdaba7c766cba4900b9a2cd3125cd738fb56e9007de77a1209. 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/QZTBD2594849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3dad721881260a17b6d2a1611acf836872abe1b8161f4dba8e4f196483a714. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:48:32Z), 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/QZTBE2503763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1756002a9b5173e9b92d96039b092b36492eb2106229f97953ec9a2d00145e. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:05:30Z), 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/QZTBE2503764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e8c95442ba5ecf2ca651b2c4a9e24a6590acc08225e9ee151353824c1daf69. 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/QZTBD2571043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11dc983afad226841d36dc8516ca697570db884f000744c5667001428c7d4d5. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:55:18Z), 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/QZTBD2571032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd648003a9740eb61270fea36c9a7ba45dce520490fd67332397c69a8d3a1232. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZTBD2592385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1a139ce8b9407e863af2e9ef3f93743e38d4ed32c45ef772bf7835c2a22690. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:28:12Z), 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/QZTBE2501539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfa3d5ced1ba60383e6fa19f4b85b6b4331e3cc0fe7c8b04ed9cc7417636ae7. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:23:43Z), 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/QZTBD2571031.