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 0x94911a2acc0fe915bf92d2958982aa4fb4cdfed0bc4931439903370369900e72. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9f096383-7cce-4983-be01-683430bf52fd.json and https://artists.proofprofile.net/proofs/artist/9f096383-7cce-4983-be01-683430bf52fd.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 0xe011c6312407cde4f5e4483c50ec335b26cb0b98eccd9561b8abf409411f0da6. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:21:22Z), 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/JPQ331617114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94db350789b6dab4b78889da6f5eae0c76985e1d3db8f77d24b5e933bea7cbc4. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/JPQ331617930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ec6b964b2564d2aae13487ec2b4745d14c0b7022ca7529efcccc03b582ca6f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/JPQ331617115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2db00f49aede5ff5d165cc5e97ddd38e36a76485acc3fecf9af474beb6f1a01. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/JPQ331617928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe888152a51409ee1faa6172777841446562c55ae6348e740cce09165e6825843. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/JPQ331617934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe850d1365d867c7e27605e6b363b9782edd295da0906f567c3e84260766a802. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/JPQ331617117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd7e219b597ec1b607fd0db4f543232a3dba6d9df20e6cd0f34d101b2f39bc6. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:07:59Z), 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/JPQ331617118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8b2ca1b6b57fc78a5dceb7028575c1afd920d6afaea801ca4eae3565e630fc. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/JPQ331617119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f4b59f7e393bfe5f6c0be9353042d010930e6d9fd384eea75cdc1584334066. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/JPQ331617937.