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 0xf136a8e1ed0db06764af718e554f9307d8ff9b309f03a5c045d8bd686c421a68. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/decdcc91-98f8-43bb-911f-c22c3278bcd9.json and https://artists.proofprofile.net/proofs/artist/decdcc91-98f8-43bb-911f-c22c3278bcd9.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 0x41ae4f11c6bc95db5ebc88e04d8bfde106cabfa8913e4749ab9c9ce68145d809. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:08:06Z), 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/QZMHM2514233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645a7bd06531a54d095fde649410a5ed88e1308d557ac58e5c53c3f5094d2d0d. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZMHP2562056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0366f6646dbb468b99ece77a75f52a67585d45ce5736b29127110c4dd2b9c25c. 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/QZMHK2599174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b18cccb25e882a1cd99cc853eed9f0854ea0c255b6ffbadf321634e591e32b. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QZMHM2520661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0ee1b1174febce10e5cd0866ff0a6d5f9dc6365f2c8438dc055bb96cbf8f87. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZMHM2541220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96f2be45a51e54fdc19c777ea565fb0e1f6ad399df1a49433f3badbee1ed1c6. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:29:53Z), 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/QZS632585311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd38de80b94c7f8fa98a2955a613998760d37dd781ec5ce666d26ce01110574c. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZMHP2579134.