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 0x1189b065078b998aef914f8a35f4266e16e9aa9be4f5e7e29cc6a54cdd0aa2da. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8ba3f9d5-a256-462f-bae5-02a5792e0d80.json and https://artists.proofprofile.net/proofs/artist/8ba3f9d5-a256-462f-bae5-02a5792e0d80.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 0xaf4e085bbdc44c85fa8b4b2cc83f0757edbc4a8c2e2392de4afdf5fa833244fb. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QM6DC1751552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2aeb573c492478d4c39102583dfaeda51aee2c5a29de7521db627e412f6203. 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/QM6DC1751553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72bc19192c47d877b9fa307c215b27a0aaebbf0aa161aaaba98437739cf4e0f4. 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/QM6DC1751554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc1acd71ef7d056c9f5126c10501de64b9159738297958c598f0d850e2a0069. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM6DC1751555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba273ffe8be8ce7b1c7e1d23b17b85993d7e6a96a98319bb3b0f54ff1498178d. 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/QM6DC1751556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa8a4daddddcc136c243e522041e4b23df03d5470860beb6f009c07d555987d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QM6DC1751558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe146a079bd749d975e53f36ccd98af4665bee571aa6f69e7b56bddb1aacb2606. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:04:54Z), 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/QM6DC1751561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc76702b005530158540575328d357d8b286812c3626893a16fa17a6471b729. 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/CA5KR0018142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41e799f90fb6bf93d40b1e5efef04b210aa9838e984a37f2d4fa498a77b2c79. 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/CA5KR0018148.