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 0x7c3168d384e2f3a7fe037b85cc910e0071a7088ca950a6842047185acb0363a3. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac9d421a-f4d4-4008-8b5f-9d54cc620e4a.json and https://artists.proofprofile.net/proofs/artist/ac9d421a-f4d4-4008-8b5f-9d54cc620e4a.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 0xe4ec9acbf95e7c38bd5343a25911d0ec7509c3299bea6c8ecc77610492d623bb. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZZ7P2435311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed70fe772743c669a57a796b631e67d7114f789774a432cca81d81ccf08f1d64. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHN32547964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ebfe5de070e10ecfd12a3beb9a73b5719d4395ed54aa78e67072ad940968c3. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:07:38Z), 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/QZK6L2533029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27752b1b62b5d478330ff13622546db4dbfc790d2bc093b02a50db1965b2331f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWR2589539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2131314df1ac99c63729ce6327511a090f689571709f003ce15bddb0670465c. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:46:47Z), 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/QZTBB2537783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3750af13211a48e5a278515251f4e7fd70d0b5c9e84c7ba7ff98b6e01e0dd129. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-21T08:33:46Z), 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/QZWFU2561359.