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 0x12393a783779d06c1d2e00d2befad1558d66936bb39cb40937e3ce5f4c39f39a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d9b550a-c12a-434b-8ea4-7931a9845b1e.json and https://artists.proofprofile.net/proofs/artist/9d9b550a-c12a-434b-8ea4-7931a9845b1e.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 0x00bc8e1734146842a6ee0faa78b3dd4bdbad398ff7ec3fabd6bf9e99580a4c9a. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/JPQ321800041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d5274849b5a12c4bfffc2f08738a4f71e42ed47501d2af2c5ef5ba17fc0ea7. 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/JPQ321800035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66a33a3cd8d3c7dd954ae39a5633e46ae35312fffa232c45ebe9b0049155271. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/JPQ321800036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31ad3b5031177f66f9c5ef1b299074b53af5bafe1fd20d5e643c5ac558b862a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/JPQ321800045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82a7b63d83aec323945fd70be740757ff8a24544e23f571c845c70c3ebcb9b5. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/JPQ321800039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fbe19d4dc47928d8af08c5b5cf88dc336d987471b9d395e5504f777b12d2b6. 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/JPQ321800047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13fc9812f3c4808ba81dc8cc87a8252802ddde872bf4573c7138cced65bf959b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/JPQ321800043.
Touken Ranbu:The Musical -Tsuwamonodomo ga Yumenoato-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d5274849b5a12c4bfffc2f08738a4f71e42ed47501d2af2c5ef5ba17fc0ea7. 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/JPQ321800035.
ミュージカル『刀剣乱舞』 ～つはものどもがゆめのあと～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c58ad0c1fcc82bb4acedac37c3bc19bf3b67f3615817a327485cce797bd9ec. 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/JPQ321800059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc3f6bae35cf818a3455bc5a8b2133bfc5b27eac69c24f4746fdca3eea7d559. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/JPQ321800060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d7ad671ebf6fc1f7a49718aca87764f24c7c3a2cfe46c87671d7d9e7cf347f. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:42:28Z), 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/JPQ321800062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb8f2cd7baa903fb41705fe07e33e94b1e65b986fa4b49595ba317e16685e72. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/JPQ321800065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4383d834de4777d9009a64084f4ee08fda96033cbe3b26933036b43d96afd0. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/JPQ321800067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd135f18ebe3252396c2ea3459cf50217ff82da6d0a4f541e5f025b2d0ec38e14. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/JPQ321800068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18bd16fc8dd0b2890bc0379da7ff26acb954c97a44cbe343ae997bc29328761. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/JPQ321800069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b387dcdf6409acac741bf719b135830bfb6d47c0931d8a6ec75860cef82b806. 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/JPQ321800072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fbe19d4dc47928d8af08c5b5cf88dc336d987471b9d395e5504f777b12d2b6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPQ321800047.