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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8207f06b9c9d09dc8dd74c628d6f5ad16387779e21dabadf5343a03e93bb6d93. 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/9b25134d-9f37-4d3f-8da3-d4aa6f8633d0.json and https://artists.proofprofile.net/proofs/artist/9b25134d-9f37-4d3f-8da3-d4aa6f8633d0.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96766de0c83308591624e049babcc8c95370d96cd81dca209177e082f01bdef4. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZ5FN2250519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9687945c85a42c49f4a644736cfd113ca6432e537bf7a7f28cb0bb4208338e. 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/QZ5FN2250530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531ffc73f4bf32331b41af88f977fd0a897d41364fc69b2e5556f57ac09a3cbb. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/QZ5FN2277461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14336bb911f9c27ee6d6306654ab1fcaaef800a27a0e8fc559297e2513c7d33f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZ5FN2292840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ce297a55a2dff5f2d462dd1b90bddda7c6fa46cf75dcdb8e2d03bcac10866b. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QZ5FN2292843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f5bd12f1892ae1c0d7d59cffd5d6286bcc6b830886d4c77de206150274d9fd. 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/QZ5FN2292845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8cc32ba51f212d99822dca7ca1e7f9a6c9477a0a19ed933cc8c99b2406af0e. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:05:19Z), 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/QZ5FN2292849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba66db9340a1685a11ffda36904897ec4d84e838ea9eaa923011efc80fc24a4. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:03:25Z), 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/QZ5FN2292851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f2cd9a7ab618fb44e9840a7ba1d34de5241278376c253374bb28ebf2f6cd27. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/QZ5FN2292852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e99e37ab493560468ac1145be4b202f5f9015c11ed54274fa8e4ddc80c461f. 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/QZ5FN2292854.
Tate no Yuusha no Nariagari (Bring Back) Season 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe64168fd977132aca461960d2aed2165243a2378ad321763586d5a2a433d42. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USLZJ2272823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939c559e53763f099a415d0eb2d9301f651d2bd89c372aa38ea80aad9ebbfab9. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/USLZJ2272838.
Assassination Classroom (Ending 2) Season 2