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 0xbb5e05c9c2b402596db1820688bea4064119123004a5eac6f9bac211ffbb143e. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e231d114-8107-4671-b826-b7e22d2e6962.json and https://artists.proofprofile.net/proofs/artist/e231d114-8107-4671-b826-b7e22d2e6962.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 0x030525dd493e15a80a1f45969f78fd5099a242fa74f44a850f36620a21c23b42. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZWFW2548096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b402b8b08af1557475b511542177df73bd48c4c6d4580c388f9fa48fb78fdf5. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:05:33Z), 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/QZWFW2549743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94277faafa9bc7fbcbf3da6780d67c63cd4c55d476e6cb5ef4d5819318888f35. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZWFW2549741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b295c2724fed8185d2a59ef78d29d4f4d593d65fb380e0f236601f9dd379b0. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:01:07Z), 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/QZWFW2549742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e33b7967a49cff278c363f383ddcf04b9714d1c70075c4c38ef2e2007018ff. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:15:57Z), 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/QZWFW2548040.