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 0x8e71189c3799b7fb84964cbf27f6c93442924403d6dbdfd1efbcd79c49e3646c. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4df358c9-d132-4385-b62d-d3bb0d7ee30b.json and https://artists.proofprofile.net/proofs/artist/4df358c9-d132-4385-b62d-d3bb0d7ee30b.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 0x8bd5f160c217b32a2848199d539370731bb6add85815940c6af546df2f8ecc30. 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/US7VG1915747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400fb932290b4d973510d26843d8c5e2b91bffabb83c0823d18d609ad3e66925. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZGLM1906984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd71183014565f056e2816f1bf9918c048dd282cae1daca0c7bdff26fb5b42cc. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:59:12Z), 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/QZHZ51918940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5567a6d70b34d8832ce1fa9681c2b4688b66adee9af3625b287cff66d94c203. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:01:14Z), 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/QZGLS2187097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626c37dab1ab3e5598e5ea0de55f09b561bce6e6a9e667482fc2efe32226abe7. 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/QZHZ32208715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf36a1739697ba606125e5329cca8ed7ffe8c029a7a0df9bae95f0c90524ae6b. 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/QZHZ62287521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87839392b5eb9e4b66edaf26cf1206186d8a9ae109df28824440d8d44e56a531. 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/QZGLM2394302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e9b824133eea41e1bf7ee78ba5c61b9e7111cf93ec9c160f08cbca3d752e52. 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/QZNJV2391201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3e7ad798e80dcebe282d193b2fd9fcb26257592d9920c3a2d4234878d7fb3f. 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/QZMZ92544482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a4cad6733a263715b3364f661988a9da222727ec1b7c25a8e759995fd20458. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZMZ92548756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50792d446e32fc3704b08477e83e3a9d18992ef5845fb3b2899c60b2bf685583. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZMZ92591425.