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 0xff85c5ab7da6bd9ea2a9e9b40dcce304023ae598aa1b11e0bc2cd8d1e923cf6f. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/04df1b39-df11-4f69-aa96-4e4af5944e01.json and https://artists.proofprofile.net/proofs/artist/04df1b39-df11-4f69-aa96-4e4af5944e01.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Akiba Maid War Opening Theme Meido Daikaiten / Ending Theme Meido No Komoriuta (TV Size)
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 0xdc31291a39ba4c5fdcdf47b6ff52941019c769648524978dfee9f244e1480264. 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/JPZ922210278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65aab0ab5a0c4a2e96568211fd2214cc4650b95e9eee3676a65e53536fe09702. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/JPZ922210279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fffbcb5d031a280aeb079f1c6908fdc7e9450f5d90fad74ddb228e079bba13c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPE561200355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506ee2bfc05a8d30a17998a7790bd68c83fcb37a43931dde9ad053124671d554. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/JPE561200356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b519f83036cf1335a2545f1cc4020c7b832d56638c3aebaf16baf0a1c1ccae0. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/JPE561200357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb531b1469bf733dbb5e4a723060a78a08066db32d90bc61cab585d6ee50cb83. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPE561200358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc199640062bfb0a8ab5fda019f8bff13ad8be93b7cef55aae83d56716fb3dfd5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPE561200359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2fddfdc0c1ee6a1aafd8162d7c1f91913bf6138b3c3946fbac0e5d0eeabb94. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPE561200360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490cd9eb6b16e9e23b5ded9c50ad8c62211279874f2eba10c9fcd16335deb972. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/JPE561200362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1af51aaa6593356581b0b3ed19f460f583bd3221048a95391adb7a75c27794. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPE561200363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc379bc03446d2b71b44219061fce6717fa54221b330990cb68a17813046e9c9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPE561200364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6972c96aa0618a671e784af04a2858950ae522cd477ff8fc8c842651c35065b9. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/JPE561200365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b15725f2450b639329f94e3dc04f3e0963c0dd270043efa2b10e268fb8b885. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/JPE561200366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb693f25888426a95d6bff92c2790dc364ddf63fc203f581847c7a08cd361008. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPE561200367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb098e0198e2b91dffc986fbf81d5ae41b1d47f1391239bb86c215ca0643c56. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/JPE561200368.