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 0xb32f4b56ebeac5658616f379eb936c82e855aead07e21f0079ec907fa21dc6b6. 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/ea98f6ad-7fbf-4104-a52a-434d596d7886.json and https://artists.proofprofile.net/proofs/artist/ea98f6ad-7fbf-4104-a52a-434d596d7886.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 0x54588a040a2ba36d57559fa85fc4795f7022e3fce91313e8e9df42fdde1ccafc. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6F2361176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e3154dea6571ebad57dba7f02d4f940e343a93d9e75eb12e7eae53691d99f0. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:24:42Z), 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/QZK6F2361177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda3f128f7e21e54f628e4610b90ff2f45d60fc22f49021b3dc2169953aeeb04. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:54:37Z), 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/QZFYY2402042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06caca81bfbd3da588021afc11d3db23e93e9f5a303d21019b04c1cbb1e3cadc. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZWFU2438015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04949c961b5b5715fa9af663318835db8b3e2b712e17a6d750fb113a40a2be84. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZWFU2438016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489a0b9291c5dfc380d414434a91b69769c774956917fa8792f2ec2164b7169a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZK6P2578444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489a0b9291c5dfc380d414434a91b69769c774956917fa8792f2ec2164b7169a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:19:37Z), 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/QZK6P2578444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f44a22b63055586e80361a5f2279e8e3fb9cf74c212c50ce2f1f7dd1b57a2e. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZNWQ2541480.