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 0xc002293ec878f22287b27036c60d60934c272b92d8bb7c97c18be6d940057f51. Chain 2 (Bitcoin): anchored in block 954742 (2026-06-21T20:46:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ffd19526-0656-4767-802e-ab2791eeb1d4.json and https://artists.proofprofile.net/proofs/artist/ffd19526-0656-4767-802e-ab2791eeb1d4.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 0xfac8ec6677440ecb2ad0780e494333bd1a29312ee92bcca12eaafad441fb8726. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:07:31Z), 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/FRX762432750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd4aea974b0e7ae961076d2d5da05cec5a8e073796b00f9cdef9461908d36ad. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:08:46Z), 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/FRX872462797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfd08d59ca412283991425eff15599b594af2cf4ea054624843ce30a132c934. 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/DGA052480170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d9cde22d931609f272db50b81bdc56be6cacd91fafba14a487524234ec9a4e. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/DGA062465356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5338efdeb6903998c9d0d080fe3d706666e10c3ff82e43300be265e33786b9. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:29:51Z), 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/DGA0Q2496609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b21557255f7f46a877b219f0216f7f247a8b1dc81ec4fcef00c039870f8b303. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FRX872504425.