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 0x132f11c8fee665a65995e4c6b3dec0f6935dc28f6d0aa83ab9d584a0a4534554. 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/dd8ebd3b-d8c1-40ed-9cbb-fd35f99cda0d.json and https://artists.proofprofile.net/proofs/artist/dd8ebd3b-d8c1-40ed-9cbb-fd35f99cda0d.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 0x4a74a6fcdefaf2b118a646d54d813e4c7a81e0d3b6be06962b2d743146269973. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPB601861816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c13b1889279502b33998d5a68d01a1aa46d08ed2f9dffe954a53fc1fe96d1c1. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T00:05:41Z), 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/JPB601877419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc341c1e873ca641f022556a17dab3d9c91ebce8466b13252eb124619cb5ece97. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/JPB601885320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafbce1b7c55bfbd976c7f8d2c3793eaa240240dd14433ae419ddf2494164ab5b. 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/JPB601897206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6875c7a55a326ba98566e26cbc6d886bba80d489ad8f3cc7e45bc09c4a72f24. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/JPB602057216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0298c9ae2339e48f5b2b88dcebc7e79e9eee8c02e7da89b4d7f21a3a2520704. 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/JPB602075337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10113e5b00c0b6bf964b8c0e3113a0ca1ec134b3ca8fa0117efd930eb7fdbddc. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/JPB602091642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11aea87b8b519d7b8f8d8354dedf35890cd1baa0e262873e3aa5e2a1525d70c. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/JPB602157924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e16df2710306f8817ace6b5364a23cdbc0b12fd448b16612d38fee656b517e7. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/JPY362100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c13b1889279502b33998d5a68d01a1aa46d08ed2f9dffe954a53fc1fe96d1c1. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPB601877419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10113e5b00c0b6bf964b8c0e3113a0ca1ec134b3ca8fa0117efd930eb7fdbddc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPB602091642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11aea87b8b519d7b8f8d8354dedf35890cd1baa0e262873e3aa5e2a1525d70c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPB602157924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0279055999b65162832d98c4935690c85354cec1c7085395f3c957de08fdc6f3. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/JPY362100011.
HIMAWARIちゃんねる☆まーちゃんおーちゃん絵描き歌♪
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb6c7767ee17703f835190729939e8b1a0201f5ada473d0be25fc6e78d6fa1a. 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/JPY362100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658f35df87f89d1cdf44db351b982c95a8491473875462937c69f277ac075a72. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/JPY362100063.