is a Japanese manga series written and illustrated by Jiro Taniguchi. It was serialized in Kodansha's magazine Morning from January to April 2011 and published in one volume. It follows cartographer
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 0x647f4c5a735193259a99d9a306b9a8b80da53bec731b82c51e35c987a9a0b96e. 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/345aada5-5c4f-4544-a21f-8d1f401cc884.json and https://artists.proofprofile.net/proofs/artist/345aada5-5c4f-4544-a21f-8d1f401cc884.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 0x50087f8bfe14ea72d990b0bb79228081c07a7d774799b048b362cad442d10572. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNWV2483461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53cbea1a1da41a6ca9736d164c91092c50357f4285dcf05007a4f4fc0e80b397. 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/QZHNC2464757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792bb4e8d83275c3b4099bfc0a4d5697a424ba7221d6d848fe55e4ba27d67fac. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHN52479714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69ce6adc3fa6e8252c1c989a593e95f46b1b54bbdb4ee62ecc42f1a4752e391. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZES72483261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7856ffb217641e3b78b50392c86c8a7ba350cdcdf30024c994271b52f9bfb8f. 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/QZFZ32418147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32af4e73a6db09af6c5d7b9f831f6b8e86ad3c70027700c94dd5fce88d2224aa. 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/QZWFS2325141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2110b2c112bdf88567a751cb0cfbc539db375d8c7fc48c4809aab929aa4e21. 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/QZWFG2368023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223438c970c39843e0c7478e81fdcc1463ad9eb706acc492868f1c386b881b7b. 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/QZTB92392542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6ae23b5c1555fd470eb3109e2baf7aa8597b6700feb4b1c36017e897b5805c. 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/AUGBT2317801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8870b71045e175b715ffc4fbd466a809b984dbc3cb792ab7590298c6524a75ca. 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/QZTAS2312992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc20ca7555405a6d7950e419fb5317811c6a0765b32f2f279d7326e082a8ce15. 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/QZNWV2366179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866dfd7b30842693557b31e20ce95dc5b51ec3d439a218e00aee09cbf9027a70. 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/QZK6G2322128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4438fe2953f2f9f0f2d25707d015f7a7324b73a1137b4a986520a607e5aa6a. 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/AUMEV2344275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa240f466da0909e8cd22abbd7179a1d383c7e7a58f1665c4e739ac0358f2129a. 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/QZHN42350931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0c3169aecf9b42bc94af9df96071be43bad0c8a2599a57adba219cba4582ef. 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/QZES52330155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833fa301b3161f07d08ecc461ea2b050f8d0b996eab15c854a3bfd2660fe3c87. 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/QZFYY2399495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe7a90ea3b41ec476ad1c0af45594518205177d50c2c9055d92ad66f7b08808. 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/QZTB72208544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c55c4d902599d8143457a33b19f099459d969cea6b0159846813acdda16616c. 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/QZTAU2232169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b259e578ac018d5358693106cbbb8e68bdc8d4442799532c134b2fcf06809f. 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/QZPLR2273694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4e97618915551e4305a717b3754021da4d70c4b0538a5d761a8781dbf4ff04. 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/QZNWU2285890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7fe858d48e71e4fcf5a4ece5e55a3f7049fa64975540c8f2ecda1d41cda0961. 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/QZMER2212494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15bead762d325c01cfc56eab4ab4b634fd4940818bb7066961ccd26bdc5eb5ab. 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/QZK6H2265130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc978196dfe857eeced78139eac7ca20a843d4988f5736e9ae4ec6ade6e3a5a. 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/QZK6K2205141.