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 0x3b98eebe9e1920f80ad5ecf37fe7f4a286e49a6bed7bbec740769e12bd2eefb5. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/edf4cbb0-1da2-4f5c-ab66-3f4f679f1352.json and https://artists.proofprofile.net/proofs/artist/edf4cbb0-1da2-4f5c-ab66-3f4f679f1352.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 0xe89e8fae818b90aadd10c4527d2308e66e3f031a773053f22986a544cfd35f37. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTB52284217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e264e3c8d4e4123f28afab9e5e6f09a4d105972fe8b7bf5edd4170a1f924c39. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFE2330984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8a563081984861d160aa61738ebd2f64a82b07b4b0782ae18f5886d358a921. 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/QZWFH2316388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffb350b2ca4458fed4829687df49f0817e2826780350c46e2358e7f358d5e45. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZK6G2403814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537210a99e30615a38a7697d4963752430ce9538ac7976bcc54b192206d178b6. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:09:12Z), 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/QZWFH2458026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b665162e6ccbaa8705af74776235259079e7adc98aab55597a892c0c84f36a0. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:21:17Z), 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/QZNJZ2580137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61e62aa798218a3f496c6f2da9c014ec8f73d58c4072739678e4a9a61ffc1dd. 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/QZTPX2505428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8cb785e7769c77b66f09a0dadc41f826d4a84f4e7171a972317fb773369ea1d. 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/QZTVM2595405.