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 0xe2f0d23f2ad5986e485e3c23298627d142e5322a24540c56ca74a2040f348b9c. 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/6d1501bc-9f45-494f-98ca-7aaed517208c.json and https://artists.proofprofile.net/proofs/artist/6d1501bc-9f45-494f-98ca-7aaed517208c.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 0xbf7d3d796b60b3086433e320fa8bc6d437f4f77ba65a2b54ee2fee701049ec02. 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/USK340700102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbf14b3ada94bab39fd2cb4b9e2dc6e694ce6f889bf543a7ae417dfbdc93b3a. 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/USK340700105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121d3eac85b693d8b646c8f925696eb42266f71ac2f5d333e3586b9a369d13ed. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:12:58Z), 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/USK340700107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525012dc039df26215780af15e012947b631082891cc5bec4cff4bc9c7a17c3b. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USK340900026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d102ccd3e6bd3bd16e1ad96af0bab1ac36c0e5d2777603d36b998c4c5831367. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USK340900028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1e2294a967b609dbc532a9a21e8d4dbfccd38dcdc2e868e46bfd6f760a9e93. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/USK340900029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735fc35abcce5fb71a980e6153c69dfc15966f24df56afd69330ac89663eba5f. 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/USK340900031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254ff3aa78557b445a0c5ccba942759674b099531f4260be8f4c6f54a3f4623f. 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/USK340900034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083857ef31872d85ddfea15077b3264320ebb9491f946099fbf300c80f921f04. 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/USUM71004159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540dc6784736c5400c6c6f8ffc48b6a9813910c78cf31f7abdc79b9d40954e15. 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/USUM71004161.