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 0xed4ac9b00e1c105361a34b6208d056fdad1d4ec413502bc2e4f3a6ba8b4f44ac. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e84ed5a-9998-4a7d-b3bb-b32508cd9739.json and https://artists.proofprofile.net/proofs/artist/1e84ed5a-9998-4a7d-b3bb-b32508cd9739.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 0xa803ab8edb70aca7161514f59f6963b39bd130f814f701e5caf6b8d7842278cd. 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/UKN6K1904534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08f561d40d27360761900bccd50737614cbdb6182474de93ed5000599e12488. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/UKN6K1904584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2fce5e44ed149ecee0613a41a2d0fc7ee141d77cc8255d24488aaae440cef0. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:37:35Z), 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/UKN6K1904594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bba5a4f21cca16be82ce38b9dd51688edb20061288ead56b4f81cd7de7ba9a. 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/UKP3G2004287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b364c82aafe50d31a6a4c9a29870bc10ef40329025983a305b745650446c6eb. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:08:15Z), 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/UKP3G2004298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f6999449d7b30bb9bbe7b6629e230a419fc05974d4b1da6f7342432b2fca6a. 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/UKP3G2004280.
Little Peter Rabbit - Had a Fly Upon His Nose
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0347ef11786bbddac44d8a6fce124cea002ff58011674f7b5f23d3a22048a7cb. 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/UKP3G2401527.