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 0x0526b861360c9bd557625590f0542cdfc413ecab100cf0e7eb8a0e4b275ad780. 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/48113eb7-c88a-475a-a568-ac4261921ad7.json and https://artists.proofprofile.net/proofs/artist/48113eb7-c88a-475a-a568-ac4261921ad7.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 0xb3f10e9487320e610c44491e5e6793897afd9f1d1d31dc38af1ed3d017afd35a. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:32:21Z), 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/TCAIN2440113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9d121ee6bcd307c6729c20447a9ddecd0be96496dc875e5d8bc74aa930d64f. 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/TCAJJ2565451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831ef6f2f0357278c32170153563c6cd84887bab4339242e8c9782355dc94eae. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:02:33Z), 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/QT3F72522508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d96c2074db9a03ed334ce10d33c09a2b4f5c2b3e127246cc86f6eb5cafec83f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QT3F72522509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd08e1d8fd6be579fadfa11e9c2249f7d15be5eda74768c3ba0145703548059. 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/QT3F72522512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562eb8d9a8a22ca052c3308f45bc23fa4fa6466c8216692b8e89827bcacba4cd. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:09:06Z), 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/QT3F72522513.