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 0x4ad9acbfd4ee5245943509f3d95b1c70173a4bb50dcaf5ef6f748d5ce2e1c3ee. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f6c4be6-4a14-448f-80ac-a7ee34009227.json and https://artists.proofprofile.net/proofs/artist/8f6c4be6-4a14-448f-80ac-a7ee34009227.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
JAZZで聴く・・・僕ならばここにいる
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 0x47731f150f0a4163e9846ae350c3bd45004a1f1431d3de2afc023256a973eb8c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/JPVI09304860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef9777b7f7661232bf4bb672b1ba64539cf7b10e594c679b5d650b93bcbdb6f. 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/JPVI09304880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e681345435e42bc3c54abc3c55aa636a1cfb8899c2a1c52733f8c8e4e737d3. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/JPVI09304890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e77187fd92e093905b399d81509eb947231c74336cb2d4ae08264716d6e9c59. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:20:46Z), 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/JPVI09304900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c755aa71ce6ff3beb32bba7ddfe1d04e17c707e993acacd78a1236d6e60e9a. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T05:00:08Z), 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/JPVI09304910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e2dc7fe60903c5eaad9b305f9a9b053876ef9c0cb71f248ef4373848a7ae46. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:25:10Z), 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/JPVI09304920.
JAZZで聴く・・・ひとりぼっちのエール
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bdaffc0e5102fbb21899b5962a79e23a3bfd0d5464bf6b17a384f8eedeafbca. 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/JPVI09304740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954410f6a4e00f5c18b9be0541923b9613f09a31a6364b584f49de08ca080033. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/JPVI09304780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c71371049118e43bf3497077f16421c90b2a8f64c86cc513bfa7b244fc5e8af. 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/JPVI09304810.
JAZZで聴く・・・ニューミュージック・クリスマス