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 0x5e8c17c0061a5ea4f2665746595ecc56da8f64c3b65f7b5a2de488982b712b49. 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/c4701e0f-83c0-4999-81d6-fbb20c23885a.json and https://artists.proofprofile.net/proofs/artist/c4701e0f-83c0-4999-81d6-fbb20c23885a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x6fb2ecab1792f0c2de15b7b13fdc9815e1dde820e2e17c8d103c8f6fc5450efc. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/ES03S1501001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1d326a14cd30a1eba41f1aeef8bce7d26255c5673fed10d2b6686f4cb0b3e3. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/ES03S1501002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77963ddc0343b4027be5309c1d47137c521a4d795c4b4559049f4026f26ab655. 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/ES03S1501005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfff13810559e234634f55951118881f2a132ffd3a5d9b4624ee02b6a4ec0ea5. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/ES03S1501012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbff5d2df2285a1320f7c8a90593dfc1f7b10adf77a2502736332ff74bc94a8b. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:53:46Z), 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/ES03S1501013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa9c4c493efdc44d6cd51289727df9f6ce94ed3e4bacb6943ee034a92992fb2. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/ES03S1501015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f926af1c920cfcb9c602a1a4b284d953abec71dd61f14085dfeea6166c1eeb. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ES03S1501019.