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 0xa1bd51fb6e9183ce577885c541e6437c9faa0345268e30299b8612b85310e071. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9639f677-5127-4113-86d3-04cd44938ce0.json and https://artists.proofprofile.net/proofs/artist/9639f677-5127-4113-86d3-04cd44938ce0.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 0x1a04a75f1c83e45d37f56b0f6ee8cbf9ecbe36ad1ddd0d06af12a765545f11fe. 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/NZR1L2001859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705b5e962a365e91694362e854e6937003e5cc4c98c16cf84e13aaf0779f2de3. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/NZRI12100388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb817cc3725f255938a94caf2a928f6217eb9e1d6455ef38a5dec252c0b9cf892. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:19:41Z), 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/QZK6H2126483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702692c8f2ef0d6eb8d12e61895475f2cb03d1574b631245aa022f396df031b6. 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/QZGLM2542408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd65f30f570f82f0193ab2ebc565e285f6010bfa516b1342058b6daf63f02bc1. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:34:05Z), 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/QZGLM2564325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0b630de9d84ebc3a525873581c2889c37adfb0cc9939732ed8d16a8c6b9c3f. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZGLM2597167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99bcc3a7f013343b400730a995bfadbbe7a0a616294043520603066e429e2c4b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NZLP02500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63065ff129967a45da7b4437e36b6f57ab6ac119d88fb8789b02004d85aba356. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM6MZ2515843.