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 0x5d62421f2d39138beb7519ca67200aa33f1efb6f13a6e409de57416ca2ebd228. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/34f0e76e-54e6-4ce5-ac7d-5ea40899fb56.json and https://artists.proofprofile.net/proofs/artist/34f0e76e-54e6-4ce5-ac7d-5ea40899fb56.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 0xe8a9b57dd9f461c6354715ff4a27a675b2ba1d3b35db55c770a261ef358cc432. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USLZJ1990360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c4f2b31eacfe8bad703b3255c5b8f6b7628d4cae7d492a4b55db5a3b7062b4. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/US3DF2143208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf639b690bbcc587739e749c9da6e38fde756a304ee7327c6f6e254f6e8ef8de1. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZTRX2216141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc5d6f96f5dc89d952618221f5a1f3f088c8a6ff97446fa7e87c8dd7bbf40bf. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZTV32286774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab22ce733f32dfdd41650e589b46a39a1275ffbc7ab5f09ea8808412bfde533a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWDE2370938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5281dffcd874d4702353242de7d6adf626fbc3d94ec87f54645755d376cef15. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/USLZJ2466208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d3f7376d6bbbda3ab11e828742b3c67e41d1d602dec2f8e17ae9920d693717. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:07:13Z), 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/QZTRX2494167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff5de9a9a0547cc5afa4a8823c9fbc094102c62f5a6cfb222ad8e3275bb7767. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZZ8B2425271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5851851685dca901721a4466deb8cc5fa7dff63bf2f41f96b3f6219c7aae01dd. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USLZJ2522445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192db5c8723375f597457cc49c56e2cfe201ffd46fd3e4a41a639f33bafb1120. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:04:01Z), 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/BK4DA2550375.