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 0x25070e821b81ba9ba5455ec657e0681a4b9f275bb9089cda9c013bca9ffa7510. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9480dab3-ab83-44e5-8979-04ae4d526fd0.json and https://artists.proofprofile.net/proofs/artist/9480dab3-ab83-44e5-8979-04ae4d526fd0.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 0x071627e744900463628c4f517071f339cd3b4c7059fc7092a780375dffe24cdf. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:36:48Z), 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/QZK6L2500964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9d4afb8a7c984e14a9683a3775535c2e23e30636407ccb807d3e9658308240. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:46:21Z), 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/QZK6L2500965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c937cf17220e64170477f0abcc9a8ae7a28c57075aeb3df86e348f8b014f51a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:24:29Z), 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/QZK6L2500966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c37c1a6d145f120786b227403b5e31ac35b69b03f1bf42ce64bebbb94c0fd1. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T08:50:27Z), 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/QZTB52509313.