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 0x8dc4d081c0a43a6824c27ef88446663ed7559b9c746cfec56c7478380c093084. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b7e9d6ab-18e1-4c38-8819-7c9f921104db.json and https://artists.proofprofile.net/proofs/artist/b7e9d6ab-18e1-4c38-8819-7c9f921104db.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 0x384158fc87510677ed1dd8d9c74669e6f588a7dc3c190011faf4cdae9f60fdf7. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/TCAFP2129646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca057e88b0130621974b41b93ccaa038e372318e60559cb698383099e6aea58. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:24:00Z), 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/US83Z2232341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145bcc8f7d52445af6724665adfd84e7a78b29ec9f4711db450dd89a5b05e097. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:04:14Z), 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/US83Z2233016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1589b2e55c5ca34c2ecbe5a687ad0c776ef2fccd7df4b7c0d71b632a7f4ffa3b. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/US83Z2236870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137afea5a54fa842ab472929af427f26db9de8b09be6e851b07ac669a846cba3. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/US83Z2300216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1c5f95aa5c6b8b3fb0f5ee1ac6a8d41e8e2214e4d8ad221af1e6a8994644cf. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/US83Z2304322.