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 0x42ea869d561cdf3e4fd09516b2aa58e5dbda797e9c755d31cbe5a07df7d8091d. Chain 2 (Bitcoin): anchored in block 953780 (2026-06-15T12:02:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4c68a19-56b1-4de7-a121-fb07e0e57b65.json and https://artists.proofprofile.net/proofs/artist/d4c68a19-56b1-4de7-a121-fb07e0e57b65.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 0x474e39a1c06047b7397bbc5e64575288019898e390d597de8a398a5c376da26f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QT3F52521790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916afc4ae2863439008d99b7265c096452f0647223a49e1283187bb910e8ef62. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QT3F52521791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cdacc85da0f1b1a1f0e8c02b3156b67ccd59abb4848a307070979aa2583831a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QT3F52521792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243c5fc7a615651bf06d21e2ec9d1bc45fde1021abd2e09eeb4999c5a54c4b8d. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:01:08Z), 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/QT3F52521793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d319412b4be3563d1e3a75e8580c09bf1f13fa535d7b3ebd1d83f290e7477ad. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:50:04Z), 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/QT3F52521794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1605f9e352b00ef3514dfce88c82c698ceaa180bcd63e2d07c025c94d11e8bf. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT3F52521795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a928842dc8174f760b6ce53eca303d152564feed93ff80a7f0a88626a3050ed. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:43:40Z), 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/QT3F52521796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94501fbe56cf3e0cefd4d9245ebe9af7dc6fe6f828121d31179bf8ca59998df5. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QT3F52521798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc465f4bb647104b9256f6036d3e3b449aea806351d231d07bd9305ab38ca2db1. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:57:43Z), 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/QT3F52521799.