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 0xeef9ead8546a072447657437b1567983bd0cb8014ce264c6f155be9fff038623. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ec9e1b3-d8a1-4c16-8017-992843fa62ca.json and https://artists.proofprofile.net/proofs/artist/4ec9e1b3-d8a1-4c16-8017-992843fa62ca.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 0xd96e098c314f7d98d0e5fd64a5a98d2d2cf2785e70ad52628b315f6e35e8542f. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:18:06Z), 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/QMLNB2100076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c159c00f109b3f02a8aff105c776dd8b45ca3d056753c99328f3ea706147fe. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:34:55Z), 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/QMDSE1704645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe686d34f316910ec4547f6893a9df0164fd77b17f295967a0457c7956d06d3b4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMDSE1704646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31aed5b1826de62d15887113ff4483f28921b334f6bdaea4e312ea5736b5d631. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QMLNB2000174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc3c2f5c2532320dfe1bbcb6af55f8c5857f270125f37b47b480a7d299fe902. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:11:22Z), 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/QZMER2103973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0b9a6e53508925fa1ebc7224aa66480ba1687f9549e3143105e531b4d0072c. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:25:36Z), 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/QZTAS2426072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0730d60b52d743b27a6e629e88a8c64499376e45fe0911720e819bb35997fc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DGA052335262.