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 0x7146c72a80ad1637da989d93431384995e3a774cf6cecc0a6e6e23397fd4e1f4. 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/7d8c137e-3ff3-4414-b2e9-e26e2c23f285.json and https://artists.proofprofile.net/proofs/artist/7d8c137e-3ff3-4414-b2e9-e26e2c23f285.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 0x8b2ab2bfb918057cfe94cb341bd84ce5c33f4472af56ea59dcbf6ba109a0e137. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:32:56Z), 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/ITIWE2100535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88083029a025286ecfd039817e6c5ca968bdedc9853da97248e6ba4819d88302. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:09:03Z), 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/ITIWE2100782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347f5352771627a1311b4bdfd9bf83b1ff87d2ad556a5dac2fe6b3532e5b8b02. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:23:04Z), 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/ITIWE2200098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe286cb34b68eab1a244ab1ed651a774a470ff78b0af19189e7902da84778db37. 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/ITIWE2201246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025ece9a83d779a0df38c7ee7bcb1786aa7fab9db3f00ffe22bd1c51e39d52c7. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/ITIWE2390032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fbf42a80fc90c008c771a803436e310e7af9d5acb33e702976ca28ee7c46dfd. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ITIWE2300776.