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 0x585fd30c346487a7a66452033edf122f1f0ad12a3e5edea675a903a0b10a9212. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/076b90ca-136c-405a-bb48-963a3dcfb3ad.json and https://artists.proofprofile.net/proofs/artist/076b90ca-136c-405a-bb48-963a3dcfb3ad.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 0x6171b04e498322ff7dc7d30ff4e3f7f94c53448da501856e2ec71d110f5bbfd5. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/FRU702000257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa33f4b5b0f785886947dd1599d1905239a8cd5fc408eb848db6c7a4501b72a. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:09:22Z), 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/QZAKB2166275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e27695c566db3c4ba8fb7221ffc0db9b83da6bbd5093a7ad005bd3d6fc92c0. 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/QZAKB2322903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ccc1419394a79bd827a0e3f9a4b4626da0bd111f170370e078cf55e0dcce0a. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZAKB2322904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1707019c4eb2eb3b45513e7f319ecc4adf3e0b866cdd5a594a69465424a5ca. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZAKB2317286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04aed44c5883496fcc4883968ea115a97ab2ff0630ee3ba2658a27cee2ac0307. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZAKB2203808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95669c1ec9a891aa2ce93566b471463c1e4744d15e7f1c043020f875b37b51c. 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/TLVEM2400258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63274cf833063c61fdfd9e759212f7b2c1b697456834215bc1516b989b03514. 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/QT2VB2435426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a1cc17c4ce2173f6e641bfc9e41bbd918beea6a489a91b061d20c5ecd04d71. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QMDA72501104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac79773a0a784e5a720c05676b9c6b670f00368e58956b186de5f82da7bb50b9. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QMDA62596856.