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 0x3ed6636e9ff1ab5351514a2f7a139d2f674b3a0bfbe3a7b7386abfe1f1e8bc39. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2abdb344-655d-4228-8231-4614e589edd3.json and https://artists.proofprofile.net/proofs/artist/2abdb344-655d-4228-8231-4614e589edd3.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 0xbc014e4e97f6995fd33f8f7ec4dcb23fb4ead3e46f7fab416835b411d2cae41a. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:27:38Z), 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/QT3EY2524963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f36682543501c83a49a9ee2d9cb1d84eae3bbb8d6a16f9d699a658bc6b5715. 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/QT3EY2524964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10991c20c7d5597a86e5a3ae65b0f79dc49580808837791493fbf5bd2a788fb. 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/QT3EY2524965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734fc607ed58857a53c456690f0978a3183342bbe1b296e812597a22838616d6. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT3EY2524966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea92deae06aa5974ed4a56de0f1133f4ecc26245336876a5df1ff1c3134f119a. 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/QT3EY2524967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab56a5fe7c16bffe9bcb0a25b1901ff6fd3f29b93f61504bb60efc04437db5c. 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/QT3EY2524968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f34ca3c6a1ed4a676e69507bad4b5a85ab7f79fb1d04022bc508259c1d704f9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT3EY2524969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24376db871262f31acf08b38a97c1381999a89363dd6481d34f01fc3b31c22d5. 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/QT3EY2524970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5101df85d1501ecff502268aa8ca40d70fa92fcafcfe6b6fc156496684b8cd3. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QT3EY2524971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd1936bd6618c8f55787ec6cb46ef7ff8879f370d2a5fee584aed25dc461e25. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT3EY2524972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1463231a07c3d023b6cd69295c3058bd89fc118d9fa8215ea10dfb97ed544b5. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT3EY2524973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e43a9185dea7a92ec75f89fc54aa2a8f60cb52607da42bcba643ae730d9278. 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/QT3EY2524974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7deba3ed8b70fc62a7ce785892d8adf5b540fb038846e14cefe05b826bc1ea4a. 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/QT3EY2524975.