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 0x2abe1ea8954e47e430fe8fb6329d8015533f6de0ac33740ef777be107587139d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/75dcaa3d-7e60-489d-ba09-8c5e9f5ed209.json and https://artists.proofprofile.net/proofs/artist/75dcaa3d-7e60-489d-ba09-8c5e9f5ed209.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 0xad61df1f61a711e1704cd0cee41bed8a272c1a47b372eb8e9252cbd11817f1bb. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/QZHN61951621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe031607ef6b037fc89260fd03bdd1eb3295f8475795648d522e4aab5e31b8f0. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:48:54Z), 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/QZHN61951623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942bf16d2b1d056a562a1c2e0a0cdd0256fa707a56ee4dd61b5eafc76b95965c. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:28:10Z), 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/QZHN61951629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad4f6890a24df5ed0474b8c534637070583d6c859e5a57bf9d81372218e7309. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:22:43Z), 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/QZHN72115402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c6e5ed789cd24cead31e3596d23697dc22cea2db989376ca8bfd1c1894aa29. 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/QZHN72115404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ebc0d38fdaff6ce9ef73b227268c2b0130a1959670c615bdfe31e218ef9b4c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN52062633.