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 0x454db746c5323f6c75924722ef87ea2ba12b0b7fce2230942da460631f9e321a. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cca54d5a-a082-49bb-a960-f39845b93d5e.json and https://artists.proofprofile.net/proofs/artist/cca54d5a-a082-49bb-a960-f39845b93d5e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
New Orleans Brass Bands: Through the Streets of the City
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 0x7ae9188f199995f90c444fdb9b39a290601ecd68530cb8d1aca4d8161b4cf04b. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/USSF11321201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d5c6a76b9ca0a1215876adfefee276e9f1faa451ab086b23903f888dace2a0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USSF11321204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d3538bb1871cce63ccb917f95d3c709193e43856ce95b6c2142fa26b1791cf. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/USSF11321205.
We Shall Walk Through the Streets of the City
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2feba12064bc8a274e92028d56d1b28ace2d6a24821f59398a8e8ef302ce8548. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:03:56Z), 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/USSF11321206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9565b97fa537d3f3282b4a4b9d962f7a8aa3825d313535b8f8a5dbac0e2a84a6. 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/USSF11321207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935e9d10831533fcaff2d116ca35c1a3656c2e83db7a370b088abf41140fe9c9. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USSF11321209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695394a89b821377139f3c6b72676032908b19c485bf0281d342d728c59e5059. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USSF11321210.