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 0xc5d0d1dbe1a32fe3f4f15561c14de3abe7c3473ca52b3991851462690d567206. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de5d8465-ca85-4007-8c32-2bc9421efe78.json and https://artists.proofprofile.net/proofs/artist/de5d8465-ca85-4007-8c32-2bc9421efe78.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 0x624d384ec9938f5f9ac46cb5ad0bcf3834ee4dbdff2dcda2fcaeca2b142c6a3b. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:30:36Z), 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/QZHN42427349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b68346e10aad25625cf7eb964798d8e13868fee93e34640e6167d39182e4c50. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:16:59Z), 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/QZHN42412942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7677856a46b29151f35ff09a2c6be18a24fb454e3c7a24e8c5d0b9ef85d7f034. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZHN42414120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303a1992b280d530e67be75ee0ca598e6d6d5b92c9843c11e06031dab68c941d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:31:20Z), 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/QZHNA2400486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392ccfaa90ed369866af198bb7be7fc94d8ff2148d977c2207a040532465b256. 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/QZK6P2417759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54d0b8ebb51767320c07c6cd2d70af275c8bef92f38716fb611c7f4a2752d41. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:02:14Z), 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/QZTAW2597622.