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 0x8184f3ca75b7035ece2e850d7e9cee9379ac406f424de2f25c9f473487fb5c6a. 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/dbd78160-e6f0-4c8e-9a29-cd6b7cffdd75.json and https://artists.proofprofile.net/proofs/artist/dbd78160-e6f0-4c8e-9a29-cd6b7cffdd75.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 0xced5ccb478ec02b6b3d4295287609813f30998173407c61bef97e0723603f96e. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:41:02Z), 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/QM24S1829110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb870084497d780622c142619ff501f30839f530b2e6f98ff6b26af8502df715d. 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/GBKPL1826774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc2f429f4c0e8f4480b5042751674cdfb0e1fdbf1e415ec7b0ec6a3843a65be. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZFZ52032917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58e23b8bb4e47912bb59a1ea50aa862c2d529e3128dc1a34df3a3a31a6e4c68. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZN882213539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe352f32647bff7b5bbb7a28afa2c89171ee925e853bf905d0389359426ec9515. 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/QZN882207461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b3f5130792ae08aa16c383a467bd05bd07f847137e9513fbe5983bfe5eecac. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZTBD2422207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924ae4c1a81e2e2991272872907c34e189968718646c40ecb076bd6082202920. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZZ762464123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916cdfb5f735134e2ba8a230bd6210e9027926b665e81bbf981bc29b86f20c2b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZMWW2056697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb906751cdab78b338451996d49b4fd2c0be55baebd1b0733fa609b6a6543b6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AUOXM2200312.