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 0xd404d0febe54b7295701c4fde28817c792e75d0f9db286923f902e4975aaefdf. 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/82b12586-d01a-4fcc-af2c-3102ecbf4ace.json and https://artists.proofprofile.net/proofs/artist/82b12586-d01a-4fcc-af2c-3102ecbf4ace.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 0x2ead57a9bb1018142995c3f05da734cc4ee722c2eab915b6095a6784077d1528. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:01:15Z), 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/SEYOK1736312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7d4895b1a0c3244b44b7236739b4a751f1709d29cda03ce942973efa30d7b3. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:51:39Z), 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/SEYOK1736314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc33081dd5872ae68c245ccf5e8dec522fad5765376e4f5896021a48d59ba0bf. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/SEYOK1814699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2bdbac4ed3bb4ce45ff449955aface025ff7d9d141a848f94af3d75a3572b7c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/PT2KL2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2bdbac4ed3bb4ce45ff449955aface025ff7d9d141a848f94af3d75a3572b7c. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/PT2KL2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf099b3275d2398f64b6e8eff71f7dbb60f6344d52971ab0a1911b099b6803ee3. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:00:52Z), 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/PT3HA2000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0fd566096083b11fb04ccfd162013c6ae2952bb470c5536ef071a5d0824cae. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/PT9EY2400487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974599229b1ac198d54f054badf1e002409066a43501a2fcac82fb0a758dfcce. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PT9EY2400374.