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 0x1b4bbf6431b48263045cc2549b98df59be1379161f4f8c7ef199918e2021cee0. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9c87311-839a-4de5-8722-e29d34d69fd4.json and https://artists.proofprofile.net/proofs/artist/a9c87311-839a-4de5-8722-e29d34d69fd4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
アヴェ・マリア～世界の名作曲家による～ ベスト
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 0x10c0b36528590a8cb18fecb74c2fac5e9eed0e1d333eff2cd30cff066727b93b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/JPKI01716697.
アヴェ・マリア～聖歌四篇より第1曲 (ヴェルディ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e76b62e62d7e4068cecfdbe931bfddde27aac80ad906932e0c8e7647e34631. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPKI01716701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e7049937921c6cff1114bd15e29c423cb59b772745648c44845b4bb1ad7d32. 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/JPKI01716587.
アヴェ・マリア (ジョスカン・デ・プレ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e43855d9e546e1497f100843d46c8aceb6f5d9b7ffef45a8f4b68a526bd459a. 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/JPKI01716696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ec4fdcb825851db461a93e2792678e447ad2aeb770c5bf200ea3ec26f4665b. 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/JPKI01716590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dadf85057fb25c9e6d24f60a20fd94345014594f8727c311618d34faa41eabc. 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/JPKI01716594.
汚れなく、罪なく、貞節なるマリア (ジョスカン・デ・プレ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209ec3de6128818ce501b01b37a98c05aa6dcca4f5fef6312d95ba53e5088ad5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPKI01716705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdd923f5bcdeabd3816ce5f7ad4e23c685ae0543a65bc644b49ca1cfecd2721. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/JPKI01716585.
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
アヴェ・マリア (ストラヴィンスキー)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17912954a8d8588569272b977b8f9a4a54f69359d0ba696dca0c9494d93de4e1. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/JPKI01716703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc651811a3cf9788bf519b8203f92829756a405e1cebf55d922251511561e0c66. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/JPKI01716704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fd921c4ac0462478fb39a172025e1191f088875eefaca5cbc021a4f3e94683. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/JPKI01716586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894b77e1c87151b4e8963f078660428a55b75efea4cef8cd56a93e20fee6b3d4. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/JPKI01716591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13bf4cbb5d1fbacd8b069ad291d0922806e0914eb86f74d958fa5deba103452. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/JPKI01716593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac755adbf208d1fc37f49d133620051edbe0fcd5397d91b72ae93b7429b968c. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/JPKI01716592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1296434e9dec35210445f79b35e05f5ab07419a576556a4b4a12cf64514750e3. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/JPKI01716698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6835812691e6f501a225623aee8ef1f613c2fdcb7b19264d513b5f212cf020f9. 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/JPKI01716702.