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 0xcb63e502f3697a75a7c4e8d2e85d0691b19c732c7556af0769b1e44dfac7f56b. 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/a5bffb52-566a-4171-b4b5-4f69d326adcc.json and https://artists.proofprofile.net/proofs/artist/a5bffb52-566a-4171-b4b5-4f69d326adcc.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 0x5483331a1f8da7c2e7357fbff31b6b532aff6fe9a1b28608abf1ab3e90575926. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/TCAIE2478928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab92312a0bf8a374b3edf334bec0028ae1ac556ae30b5820f55ffedb87ff39f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:07:05Z), 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/TCAIE2478964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d50c8ad759b7ab5cabc8cb214579604a21fe572ef630e23924acc8bc07e5d98. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/TCAIE2478974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd5b60893462f0f91a8e761523bbba70853ca547ae0b1f07b7afc2f890d0aa7. 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/TCAIE2479010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffcfa8110ea15d69436d3595b616cb9ab901702aada940b36843efe0c3b73727. 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/TCAIE2479027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5cb27da3174184a2d5487e73b12c3d83277a80ea490a0d64cc58ebc3ab6c003. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-17T04:54:06Z), 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/TCAIE2479052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2960eb566f06faf94f913317606ca610669aab933197dcae932de8184a11f65e. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/TCAIE2479075.