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 0xf243263683e930c92e8bcf29d9cd9e9d8548df2e17e16011aca09e9e39a68b9e. 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/3e3ced5d-ab4c-470e-ae66-95e97b92b126.json and https://artists.proofprofile.net/proofs/artist/3e3ced5d-ab4c-470e-ae66-95e97b92b126.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 0xf01fd49feeb28d0f3dd66c8e4323010fc97fcf16a31bc7ad61986522f879454d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM6N22428920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666ddbd4e6d84615152ca070f05e9ed9459c55128e9cb345a6d069b3ba12d699. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DGA092395756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65206c0d0529d3564e3bae096d5d647f50ec49ac5fac2b9abc482fa487f1983. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZQAY2415740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386c6a982530b4baef91774b3d54b8cce586ff5a2dcc14eb5bd3f3153eb874d1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR2X42441307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfafacde7850549a3103de7af197427cbc24daf57f658a6cf155d5191c2a92f42. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR10S2440229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1c6209b49a000405a91ab7cc2e62e3a270c64d884b2b50cbf37e55413338a6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR10S2402601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837a5a952594d4baee9d163481e1e09eadf21d85fc0a9bdf54e8c0d51d59d546. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DGA0R2325199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8376e603eee572e3eba2a4bf3677700eac2b1dd9b8da4bb57b0a13ee156e3a75. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DGA0P2310707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2ec5eaeffdf5d46011d23290a1acb8b7dd8fb3d7f3cd6f1e5c00cc2d7f1084. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DGA0L2357881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb72f4a972dbebbe9c77e50573292790323ebd06b6bf7ed2ce7c60c5c29b5618. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DGA0L2357879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72bcce6bd480453d1ac955b767cdd02d47413f0ea8f426b5400782956016183. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DGA0L2332508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ef6cdcefb3cae621e0e6482b13bbf77e43556c983025347c2c9434fccdcc12. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DGA0H2339178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987c1e375bca2062a6c5538b81ff62cd5a81498af0911bc046b194c2c550db11. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM6MZ2483660.