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 0x87394f8246b63919a03870c3c312eac5dd6f4b4f5eea5802ed55cba3b4ea8342. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a066a5e3-0073-4eef-ab60-23c03e9977cb.json and https://artists.proofprofile.net/proofs/artist/a066a5e3-0073-4eef-ab60-23c03e9977cb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Let It Go (From "Frozen") [Cello Version]
Making Today a Perfect Day (From "Frozen Fever") [Cello Version]
See You Again (From "Furious 7") [Cello Version]
Bach Cello Suite No. 1 in G Major, Bwv 1007 - Cello Version
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 0x716f92eefa94e30442a57a3d6519f74512ba17e0f7b739a1b1193671e74e03d1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:02:22Z), 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/QMM9G1500119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef314d7ad704cbf66bf21e6124c77979ca0a10e73c51d01370cdca339ee006f. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:11:32Z), 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/QMM9G1500132.