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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd4d22eb1788382237044c31bcb829e84a789fd3c7ab0b2e4d3a49ca5120a51. 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/48007643-2bf8-45f3-88bc-4661e6d5d362.json and https://artists.proofprofile.net/proofs/artist/48007643-2bf8-45f3-88bc-4661e6d5d362.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68fccf61da41943e3604dcc2dff9d346b0f11f5338520f7db8ac1debc075ae4b. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCAFU2192730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a533bea335a57675db7ff6398c0ca1a4ce002d475f28cb073f1330f5937ed9. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/TCAFU2192732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ffe5509ac383fa7bf95f74fec5443264c88d74ad1ee1b82363e101056608eb. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/TCAFU2192738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe326d1ac639d58a7b2e71a5aa694f25fa9624c309e9d6d72f2b419c220773469. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCAFU2192739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d1580717298cd71b9dc9ccb63b398539d88abd03522abd26c3cd3c344115e2. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/TCAFU2192740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7934a8e49cdd2d15e06eed94d33b69283c4dc12ef2c3342b3dbc7c5192b3a3b7. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/TCAFU2192742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5118a7fa26455e42294a136eaed6bdf82fd01466eae60f4ef60b57489f2fc9e6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAFU2192743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e17693fe9ea62c666c5276d05f2b1a626f077aebbe87dfb3652edd67719aaca. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/TCAGE2297729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d25fa15937f22c751438d63240064084a0aff3b2bbf171c61b519f88f15a90. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/TCAGZ2343391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d51423a4a112b39d8f120db52b50e44de1cf6ba11616ea8763799456da60fe. 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/TCAGZ2343399.
Melancholy Girl / Everythings Gonna Be OK
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c17527db84bc5d2e1a49cf31f520a88c9a99179afa02f7eed1431bf23d50fc. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/TCAHI2348747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649044e0e0121e2a29c26ff7e0081f4f1201c69f0872954a7d9f8105bf778055. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCAIG2498508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41a5162ad038c901eae17a92c036e9d3439e982c98ce87c39b686a2b469fce4. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCAIH2498556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b29215e0c84a503d00d26cee2b78fa73bc2f7d0efbacd0979b1b41fdb17bd0. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/TCAIG2498565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc6fa05f8fb09575a61a431712a2001c3958c89c5e4629dfb83e56a4bfa2868. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/TCAJM2571090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8122d88f33aa8dc6fd0a6253e8729737e061f3cd5c0387d05a71a8e11c46fe9d. 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/TCAJM2571111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00e74e6fb6fb5df54037ff5215f3d6bb5f6c5dc1f9454d030899dba03545e42. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAJM2571121.