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 0x04f971072b11452e2d87d90f8818ab2432339dca34aa4e7196b6e6baf8789a36. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ca624f9-987e-4bda-bd5f-146130f697e3.json and https://artists.proofprofile.net/proofs/artist/4ca624f9-987e-4bda-bd5f-146130f697e3.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 0xe9e24159ce28c434de59a8ae94ff8e743470fc9a86ac78d444743d61a1d039cc. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ESA012512218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b728317d478f47d2b7d7c649251e8db1dcfde095cecc3d5180aacd51f22f18. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ESA012512209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8009e9be25a62698f9b37ea98ef885ceb531337ae181534df48aedcaf1135917. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:20:45Z), 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/ESA012520818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb1639ea2ca83ac465fc1fb2fda8f3bc7c3e7095a1924d67ff0037c3089c43b. 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/ESA012568058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd1febe7e25015ba04f696188ada751fd1d977dfdb0591484f93b71a0f496d3. 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/ESA012572525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1714e02edbc6cf10886ec9966eb00d719ee74f413092f8e999fb3e6a220fb472. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:16:54Z), 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/ESA012581157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05d4cbc737368a532cd1ba061e0c62d5c04093a0a746cd5bc73f330c2c89a14. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:06:32Z), 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/ESA122508733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319fdf5b530b9874f94caaa8cc3d314a9f020d87eb9f8f4ddd6adc28f32953c6. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:04:24Z), 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/ESA122514554.