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 0x9e92a617b9f77749476126964d0a279f6865fb2b69f30b8b7d48600e538a7f02. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8068628d-17b1-458c-a2b4-b960905e0203.json and https://artists.proofprofile.net/proofs/artist/8068628d-17b1-458c-a2b4-b960905e0203.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 0xf3c04462982771e0af910e15bd955d18b7cf17a5e2bc51ad27fc506337a78a78. 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/USCGJ2346206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15770778abb16d20a571a428804f799e46a6ab2083e13c6bc92233b36ae24ef. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USCGJ2346208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823342d1f1b59bd37c2dbe4422a09306c3d18528ef56285f2066e1194ed13e22. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:10:49Z), 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/USCGJ2346209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2ad4abeb22b0294e97884aab1ea709c3ff43872c6d3ef037fb1e8a9ee93198. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USCGJ2346212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422dc1f79b350d61e79ec8b51c89fb558263f4fa11dcb77f9b6f75156d41d8a2. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USCGJ2346213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbb720a8045b6a7610168adb79eb8a516d33c5da7281e69b6b4912e770ecf07. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:26:53Z), 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/USCGJ2346214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750127f6c3a56b0876bcdf7a52f1ab03baf616741bbe2ced54aa4e6a96bb4ea7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USCGJ2346215.