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 0xc3dbc8847c23c862320bbab74a01f29dfdc93165a11eb5ccc488af751c329ca1. 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/c0372c05-948e-406c-a9f3-6ff0dfd2e185.json and https://artists.proofprofile.net/proofs/artist/c0372c05-948e-406c-a9f3-6ff0dfd2e185.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 0x353526b31c1982be79dbc12f82153ef40712c50dd935864a21c4260e058f13c5. 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/CZA232200139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0468e3ab0106164ddb87755215fb72674b1a11723525f08b8f367cd31436d9e0. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/CZA232200158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ecf6067541d67e165e7de4b462b9f0922d7286aa6f80c56c0fab805afcb2957. 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/CZA232200160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15ac43ca335249036a8aed5f963f99aa43472414ffe2e5e2a0d9347894e7351. 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/CZA232301417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93daec6af9452a5c2c8170725e818247173a708f23a08106d2524b289cd06a4. 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/CZA232301419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16a77ac3cba3ee83e286c1d4aa3cc87744b98707397e89814bec45f3d795a0a. 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/CZA232300117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35383d4ecdf30714c8af595c04aea3084cc6f3f9e472542d13306c10b11a7fc3. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/CZA232400397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922e32423e386595e0f88d0e88dc6bac71987ce1f6fb92bf71e13dca4cca0e1b. 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/CZA232400692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b157389524f5612676a63c7a08bbac8e523d3a1e309173eece19903514ac5b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZN882403310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84275732e61b949752955375b1e38d11b077181d30685e09b61ecc5cf665bdd8. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:42:30Z), 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/QZWDW2467360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95ec4c4362f61bb25468fff73168c98e31cff2e93c0de099bf44e645b6e1e63. 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/QZN882513755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214079fc9450e524ed9505f728b16d2b1eed0dd8e57fe21d47977e6c1680f611. 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/QZN882513756.