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 0xe2741c8e10df632b3afc09eb0988394e9acee2c4bdb86599b18cc2803c3a5753. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2dd6852-2f39-47fa-af5b-71383019fe04.json and https://artists.proofprofile.net/proofs/artist/e2dd6852-2f39-47fa-af5b-71383019fe04.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 0x00df215d9d51460a43de4ff3e3f40e8c09e8f4e40ee00c61eb2b84d84887d495. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/SGW502535334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267e71e654702b2b25beb0859029bfd862ab80c6aded2f33b4fc3c63aadf8871. 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/SGW502541014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f865a42a418ddea669f32d11fe69ff30aa51c6b0b5c48e773f8436ce636b5fa. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:51:15Z), 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/SGW502582541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9911849cc921d24de5adc731106622b64778ff9e0ef83bc4aed3ba0c61b3097. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:48:23Z), 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/SGW502591845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a21402b6d0ccfc48e1a7765642b1a1cf8912c458f1f80a9c53342f4d9037ffa. 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/SGW502558733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebab65a0acf8d0b17d9e55725f6a1582cb801b1db03e045231eae073bb193371. 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/SGW502536122.