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 0xff6b5a6bb8b3a8d4d7befa9dd7fa4fe8ad9057dc3d2dc3601bde150db92012ec. Chain 2 (Bitcoin): anchored in block 953670 (2026-06-14T18:07:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58a4f5a7-7b84-4f40-8441-263db85b450b.json and https://artists.proofprofile.net/proofs/artist/58a4f5a7-7b84-4f40-8441-263db85b450b.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 0xc1a594e88b04b8c674c8f60a49e39db097dce050bf650b06beabae214e0eaed8. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:01:51Z), 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/USL4R1942747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6231eed9cc5ebd0b9790814c856e5994ff7614c1df6f477b15509458ced2855a. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/USL4R1942748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4bb2a56d75f00c0f9945a976cab2116da46558c0d889a03e625d24ac2f84b1. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/USL4R1942750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a800e298436df5af4bc4d98ce056bb127575a52a700c673eac73e33a302449f. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/USL4R1942754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89def65ab95fdbc2f98b0853c80753b35e52f0ff5b13065b289ccd4966914ee. 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/USL4R1942756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c47c76af8824e83ef87bc2991db6a367144e8bc97e34a67d8e4143b2a49894. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USHM22171504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b4fd006ca9f12099cc259186c0078adbeffdc90bfac602fa68f782047e9b63. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:33:10Z), 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/USHM22171507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb9767d56ae7ca621cdcdce2470ad7746b118cdc32e7f2b2abd7a6740591f26. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USHM82205497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884404e48ace6388973ae8915abcea145d6b143e421a33e3a4c20d46a5d5c13a. 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/USX9P2428778.