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 0xb55be57a08076291fd3c3bd1f9ea92c4c519b137dc168d1c27ba3528a83df4e8. 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/bcc8dd00-f740-4c98-a67c-6fd6370688f9.json and https://artists.proofprofile.net/proofs/artist/bcc8dd00-f740-4c98-a67c-6fd6370688f9.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 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 0xc3fee50503e73b873818b3f2a7e0be114e58c8bfd5f9bbaded46db1b494447d6. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/JPTK00615770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59a522c30a2740954a9c16328d339efeaebb5bd561c8e7a1e8a89960253af8b. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/JPTK00615800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819020af22a3835eb3afd8d76132c59dca9beb150ed094eacb686285fad9472c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPTK00615820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac38cd95c147ab1b8ddf8ac95a7afdab2fdd0bebd0e82f2cf4ce91ae8241e4f. 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/JPTK00615860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3d5e33ff36162156dee8a34f0893184c6616244936b73732e4c513ad37c23e. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:00:41Z), 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/JPCO09232340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5b71c92882f3ce5ef8e86ad40f7ba9f1b6e6b9b94baf98a0767db95860d430. 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/JPCO09230000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87070bf168edd435fa1db1e8f9060070352e06c7757ac3b0a459a3b1694a21dc. Chain 2 (Bitcoin): anchored in block 957608 (2026-07-11T21:00:50Z), 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/JPCO09323550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7553da4236ff9c638f31db136e5414044224d228242f52f52eaf8d6bc405aba5. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:55:01Z), 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/JPCO09424790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747ee1b24ef2f6f1f03d48f8eaf6eed47eae863806763d8f4b3d95fe0d32a287. 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/JPCO09301440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ef10d7e87b61032bea6f2749a986d3bfcb854809a8ef58ce6d06219103b9be. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/JPCO09764900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab257f61bc801a996b4994b83710c57da4767106faddec19cc312108d5426ce. 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/JPTK00711370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9efc7f5c7e32a5862426c320651c79b2a7065fe300753cd5bcf3d39240efa6f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/JPTK00909300.
バラッズ～ベスト・オブ・スタンダーズ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f2042ae9bbe32dec0cd457fda703f88014ca4030e72b02aff41cb6b0ca3719. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/JPTK00808400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd838142be1b8398e11ae6eba5827c488138aafc0a155350c5b683f1b8b62ee0e. 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/JPTK00808460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07399875a4f922545410920a292f91c612a60d84075c2eb8ea36d0a3c516418c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPTK00711410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a304a9e99a031aa191708dd00898767000cffd9edf36c088bc29f441ffe044d. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:42:43Z), 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/JPTK00615870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7246ce7cabba5394713bd346a9c5d08b1bb8bb1d38d78233667aac5a6c2f08ae. 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/JPCO09635880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef6dc72ce3bcfca42d14608c1ff3607584044372756885992f6e0c9989871b6. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:53:31Z), 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/JPCO09445070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8ebef9c25c3ec299c83a5510b0537969956a9dbbaaa0d5e6e6386cd726567f. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/JPCO09415030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87070bf168edd435fa1db1e8f9060070352e06c7757ac3b0a459a3b1694a21dc. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/JPCO09323550.