thumb|listen Tope may refer to: People Graham Tope, Baron Tope (born 1943), a Liberal Democrat politician in the UK Joanna Tope (1944–2024), English actress Mato-tope (1795–1837), Native Americ
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 0x8ac4a2178ac48855cd7d44c5b291ecc9ac11f512c8a88acb1d2d6c6c2541df02. 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/68c4131e-d62a-46b9-bc32-af9dbfe657c5.json and https://artists.proofprofile.net/proofs/artist/68c4131e-d62a-46b9-bc32-af9dbfe657c5.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 0x8ae59fae837aed1fc17cadabd8545b4b745901a833a76af03d87b2fb6489688b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZS7J2350515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c7f4f6edde1d0e6c43ff6dd64908864d4f17edc093cda2ea2d4a0771ce7e16. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZQAY2402013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd8b203ca05489929c222113aed6b43d0d02d003b02e20b806bd2350e5e5acf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZQAY2456758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40dee0ed2e341ab5b0f56367aafe27cc069db2e32f2c39d218edf202c480ffce. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZQAY2443114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008c851d8344a729a6ffea375747c338a741bb52933ee67811c0cb8a05fece82. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZS7J2338113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeef91c46a15ee3634fcf1aa0b348e559ef3f68572f9d404e2d0ca91533aae44. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZS7J2311877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe233efa3e884427c8fe4966932a7cacc057ce9244cb445dccdde293ee4159b11. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZS7J2379967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28dcda30831cb4688665fcc1e19bcf19277a135c30b224c8f6e838e19daa484e. 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/QZS7J2321720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd07ba1be0fc27ba7dcb463394e293e4587201bf3f3e1ae04436a7441c6d8e7. 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/QZS7J2330162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8126b8a303ed165640ce8452c912f2801493bcce2257661f6640983ceae5a74. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZS7J2364381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29724e3f4194e585496f3fcfbb73e718b77a1996acb1b64578eeb32a5e39fdaa. 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/QZS7J2374701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39f699005fedde6b7f78c49754ea03ff50bb3aebe0e8ae435a31b707773fa8e. 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/QZS7J2349281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9383c6dc08d3ddae1ba3c5879451c58c5f3c43c909fe2daf505b0afc7a6209. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZS7J2375304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe94b8fe447aa9c5dc3847c9017fa884ebd4f446f0f6026ea4cde17b7bee601a. 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/QZS7J2337998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf912e61dac9b90938ae5c183eb5e58fa38d51ae15948979937735e287892b5. 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/QZQAY2320398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a30fad5173706682eed72de056d461ff559c5d48d07a42af8d5718b9783cbad. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZQAY2323397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af0b1e6d0acffac46740cd60725ea2efde8b1e8e8fa20f2541e9636d5be0b8e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZQAY2347536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27387aed681f97d84fcc190266ee5688e6f976484732c7db2978973afef01b41. 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/QZEQU2268521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3dde66133d5cf61d0503fc3fc674eac37ea1ce644c12c8272a56d2cbc12b42. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/QZEQU2268523.