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 0x4e428a42521521105344f9e800bc7d92cd89b5806d2d98a31fbe77fd1a5b6388. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2d9d69f-a191-4c10-926b-da2ff6c50099.json and https://artists.proofprofile.net/proofs/artist/f2d9d69f-a191-4c10-926b-da2ff6c50099.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 0x9300d27f5e147d1026784e5b72ba530c6fddc71a73c7459b7e18647131323d03. 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/QZK6P2523075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e827387f2a07649b4d47d013d034da58af6f1ed2dac443b37b406508956596f. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZK6P2523086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358271365128825c2f42340e7fbac71a0b2f4334f76f91cbc876c287a34280bf. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZK6F2588696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e79f23f7435b3ece63cca4fbba6dc689c85a9e81d249c642424290a2700a520. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6F2588697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85a17983c38c7ba89a4a1a2bcfe34693e40f3bf3d63684f29c5d9ed4c13a4fe. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZK6F2588698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0634a657902ca53dacd08b62f81d782b63f2e992a0c83c1142cef26b2b2e3ae. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNWS2590855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb841ec5fdb7ab0bae99e182986bd9024c8ef9d211541a98b8602e6f4039665. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZNWS2590856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24927e148484499eced9a9881ce2369f7811fb87625c3a287601370eb8bb50d. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:53:17Z), 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/QZNWS2590857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dea30efc1da4f06f012fe6568d513f98b0570f6f44562055df4ead2e3c0686b. 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/QZTB62521429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8319cd8f1e843271c0deb4894fe0017a94e228b40287656a371db7a8bf03582d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTB62521431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe791283126c19d77947f5091060576caffef5c91d986978a48183b0866bd6e55. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZZ7T2594116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d74dbd6fe6a746a9b994ce9286ab1f03971b1e2f9e988e194e1da8233cda7aa. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QT3F22526778.