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 0x52676c4b96a3f61fcb3c1597a78767b736392ac89f3a927cb07dd16afe3c11a5. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9374a343-99f8-4357-8198-6cf307f61d81.json and https://artists.proofprofile.net/proofs/artist/9374a343-99f8-4357-8198-6cf307f61d81.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 0x9d61ccac1683b8688aa51af7acc1e20f5ebde30e1a49cd5ad0372007286b1b37. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USA2P2046719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe181142fd7cefd69a8dbef4efee863da7d60234c5182d5341e7f77f0860a9035. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:30:57Z), 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/USA2P2046721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641f0eeed162deb71f0af207d1420d4db290f2889b5d6322d9f240b41fcba4de. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USA2P2046722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4010bfd8b39ee651bcf2623c2a7432643f00b65f0daa61c7dbeca1409991a4ad. 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/USA2P2046716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2ac77e089f492effd0817f751fb2ed66e2b7d042e53f371d310120198b18bb. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:49:40Z), 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/USA2P2046717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889c6918de3bfe35e570df3fd33377b1d41022b960e19df9e935113cab018d7e. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:56:31Z), 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/USA2P2046723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71344aae5ae5da79ca326e97799e4e00f20177853924546e168f702c2aab77bd. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/CH6542415539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e09df150c47ecf108db2194aa94fd438c9e7716c5fc6efa53f8ec22b6959c9. 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/CH6542415540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e23cec6d41ff05913115077e6d087bda0c71346b6bb6f85c329aa55fbd46daa. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/CH6542415541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9569f672911eda98932205d7281ae176a71e59f8ff50b2010914ae8162a46b. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T19:07:22Z), 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/CH6542415543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cefeba3f48537e5cabe27be480bf66cf631e680131375ac6255656bb47b7051. 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/CH6542415545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6df30c123c1cfea2b8f897ebcb6d4a2f40ab8c68a595c136ab45eaab7f6968. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/CH6542415546.