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 0x987ac478f3138cd34c3c8722fff05a59135d11433627f268306f174edfb7689b. 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/e5cccc09-c9df-412c-a851-4e04780f8f6d.json and https://artists.proofprofile.net/proofs/artist/e5cccc09-c9df-412c-a851-4e04780f8f6d.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 0xe0ae903b1fb10a267eb6db6d70a7ca4149b8248d1c23e3b2b7e30f083fb3baae. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZTB52357574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8afe9ba7528453dcbe2bd3bde2b359ca75358adc5e0d6fde769abc4750366948. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:40:18Z), 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/QZES52429276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ae903b1fb10a267eb6db6d70a7ca4149b8248d1c23e3b2b7e30f083fb3baae. 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/QZTB52357574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de7c107e1e8bb615c995c522740a853bda60d8845785ddc2549b3327790d9d8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZZ7T2468673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0500bc981b1713a8c2423c77a4f50fe438d6484a1320c38fe1d9bcf142e043a0. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6Q2548800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6769b027a9a7f68fce54c089907045b96d20315a9d0e176ccff39190874aaba5. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:00:37Z), 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/QZPLS2560615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52a8c1b4e8127ab6b8a6109828f1e4041cd17c20e1dfb8f65f131f7cf875324. 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/QZWFW2577389.