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 0xbba16aac1db23d3789ff98818641cd9fef90dd9feb135b35e81284729d4c4844. 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/947eb546-cb2c-4779-8b8a-fcd4bf84f914.json and https://artists.proofprofile.net/proofs/artist/947eb546-cb2c-4779-8b8a-fcd4bf84f914.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 0x61ac3c8e5e9948b51e441add974ed5b1bd7846503009f93af5443e45d9d1d9b7. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZTAU2124025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d4d25e20dfce6d44538c1f8190641a0fbcda5f9c01611b1e50ac847883d555. 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/QZPLS2289993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505eaee6716b54d454f71092660db4e8394cfebde55a344a81de8468b2fc0af6. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZNWT2339673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0ac8b7063bd742ab680b7897df0cd8abdb4d1032d3840c3a4eab5a1a0c6fef. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNWT2339674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c2746a6c9e11486ade4de35db45b2a5155c4b5b066238227f7990bcd4a9038. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWT2339675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ef074391a177550ea1ad2b4bd069a771d09b47ea985878523c928b059fb301. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZNWT2339676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b34e7fc64640a9164c5e1ebb270bdd62e3b913ad17442dbee29f506db93cad8. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:08:10Z), 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/QZHN52462166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f1cb3a3d53fd24310bd258851695403d0c0fd122b64f2a11b96c20d1307491. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:00:55Z), 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/QZNWU2544561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c1b9eea03983875e94cfb6256e0459fdc165e14fe853f0244469fc31646a84. 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/QZTB82534860.