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 0xd3e3c68dd699d2144b977312c875ca5f744f2c20a99d0c7b08e420210d63f284. Chain 2 (Bitcoin): anchored in block 953782 (2026-06-15T12:13:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d48f5bbe-0f28-4ce8-a56f-ae34bcf0dfb2.json and https://artists.proofprofile.net/proofs/artist/d48f5bbe-0f28-4ce8-a56f-ae34bcf0dfb2.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 0x1471590231b47987d0b88c35f15f6482cc7fa6e97c50ee7d221aeaf7931e7a42. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CAFFR2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf41278d15bb76826c0c77f974ca429fa966da3289c1263bb7ed67ce8fee174b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CAFFR2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b776747779377cf0c81ecce056974c8db0985e0e69ab9bdf6db76a10fe54e71. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/CAFFR2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4e183dc28282b926ff891b79090d9c4fb2474d8452eb964b20577cf4834efb. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:43:35Z), 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/CAFFR2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46059d02bfe55f6d1e758d1a62562ffeb77d489bce8afed7e573976ba7c1ec55. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:57:50Z), 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/CAFFR2300002.