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 0xdeec1fad6b2920a0d8fc3636bdffc42929077613883fbbc1f2a19a336061861e. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2bcd323e-c4c8-4dba-99dc-ac4ebbde8695.json and https://artists.proofprofile.net/proofs/artist/2bcd323e-c4c8-4dba-99dc-ac4ebbde8695.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 0xf0c016ec5ecb1662246c5b6c846652c454a222098cd1e58cd95e7c275fededef. 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/NLAM42400330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a37717a360e4b7f994efbe0bc459516258a0f4c41d112a9ea9d0c09112162de. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/NLAM42400348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa690ec34609d405b1656eedb1c800084374fc4014a1dffbb2c0bd0ec57e5463a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NLAM42400371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7490a0f49c0355a71196550f0b181b8846c8e64a00fb9af4985f7ecf960a45a. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:21:33Z), 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/NLAM42400400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c36b558bc661606ec65a432dfc6d06322cef616b7659fbe21bdd8b13b2410e0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:38:24Z), 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/NLAM42400414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d1e046d40a7d120c46ed2f553af62a0097ba0f44d50f484af385c9bd18a154. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:05:04Z), 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/NLAM42400402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c252d19baaff1b27cdb83f5145af3f7f76d31197024977619aa28c00c2a698. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NLAM42400412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e10da5fcdd6039f346f6f98c3bf4a03281cd5c9791bc3c9310b347ee3c7ab44. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/NLAM42400405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37583cd472a337e32d631d0ca8c10c2502744d30b2c79f82eddc7464bebc6555. 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/NLAM42400406.