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 0xb172bbcb3f1cbac573b3f81b2245c00d2989d703d8023d6b29c8565b050b0a83. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f84a7985-8c2c-41d3-8f08-3129c6e0a6f9.json and https://artists.proofprofile.net/proofs/artist/f84a7985-8c2c-41d3-8f08-3129c6e0a6f9.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 0x864762f4c0ceab4b61475653dd3a1f7a4bf41fc19664e9c9be206260315af6c8. 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/QZDA42448118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde27e54cb0881d62f9072709b2954aeae928bd6039b0f59cca1f2d416cb15e1a. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZHN32442370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde27e54cb0881d62f9072709b2954aeae928bd6039b0f59cca1f2d416cb15e1a. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZHN32442370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b34867097455f54e9e8ca33ea69a2e0498df2bea6500a69da6c57222199b92a. 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/QZK6F2476846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b34867097455f54e9e8ca33ea69a2e0498df2bea6500a69da6c57222199b92a. 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/QZK6F2476846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf0c1f269ade2273245c2d0235a66a9b08aefe227dd566b1576aea3b573003c. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZNWX2450173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf0c1f269ade2273245c2d0235a66a9b08aefe227dd566b1576aea3b573003c. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:37:42Z), 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/QZNWX2450173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2132c462f6529cf49e93bcb4dc96df0e014e6f3f41640d7f4e60b544c2cb689d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM7282406750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d65560e94e635547b28aff4af753d09c2b95c1d154ae96f2edd89d99bc3d6c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:55:26Z), 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/QMDA72495421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d65560e94e635547b28aff4af753d09c2b95c1d154ae96f2edd89d99bc3d6c. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/QMDA72495421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b75488581d23ea9b76f9a4717efbc0cd0eb79aadadf1bf90119609cb1466f91. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:15:24Z), 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/ES5152500496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ec4c0c2d2dc9878cce14061fa69a79c17d50b085f827196b4b5c8fe997d8b1. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ES5152500412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1117ad1e9a638dfa575a27f549014a72c8f71867e989ff59f65393cf3a389e1c. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/ES5152500497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4c3a2341dfe49409d1c7e2fb36f2b15807d11760e70dd50c0ddfb82bf84be6. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ES5152500295.