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 0xc40dce4c203f3760f55580dc99bc15db6dcd4ed0a272288444afa78d56768151. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3a4f7471-e2c9-41fa-bca0-f294d6ce2176.json and https://artists.proofprofile.net/proofs/artist/3a4f7471-e2c9-41fa-bca0-f294d6ce2176.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 0xf6cd73ce47ac85f86b16d60e18969b7cde6df412ed81ebead7732b3142da4d14. Chain 2 (Bitcoin): anchored in block 957539 (2026-07-11T08:09:42Z), 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/TCACP1638015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64cec6d7a250d539bdea12e7f7b5967d75976620d38aa4f4a35eaefef2c59bb2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCACR1624077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a324e01d289280d07fd116e2b5add546ba034679c6b57012c9714ab04d5247. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/TCAEB1958587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6a3c85e9c654bf85f9107ba567366dc63529cf5e4971c877196bab7d60db93. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T08:03:58Z), 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/ES71G2314993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f8d690372e09a98d6a6f76e6e4a323352c2a610d656639fdcb51f5e9b290da. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USHM82162103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce3626c9bc6c1cb3d7d2eeffe999a826b605e3428c5dd1d3dd0e876c784cc1e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ES71G2412515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0c371bc01986656fc881accfe5c7067675a8681ab462cd5ec4c4e815e6c677. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:54:25Z), 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/ES71G2423552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1c3cedf1270ca14a2224103faf6d17885724e1b7ce91f00faf2b9b6471dce4. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ES71G2423546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa498cd7625b90c1633abda06266a8d5eb30180a8aec03aa10f68043ce87277e7. 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/ES71G2423548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763b2e00e3aaa5a007884e0d43eee4bd0664033216a3fb047e41802fc36b73dd. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:55:24Z), 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/ES71G2423542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd51c8ebc341efd326f2c0736d928ff3f9c6ee6dbc70f53db6c7872f624c91e5. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/ES71G2423547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d16d5d059b96ac2e1ff1697dfd44204f48ee1cdedba6d3eec27f29a9828fbda. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:24:47Z), 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/ES71G2423550.