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 0xd5cbf92d203141e570478e000a404211e13c6fd659179f611f629968281d8cc7. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e7cb8b9-5cef-4d72-b3cc-fd5264c4d1b4.json and https://artists.proofprofile.net/proofs/artist/6e7cb8b9-5cef-4d72-b3cc-fd5264c4d1b4.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 0x56662bb9fe4589bbe3b03031ba15f4af7a783a8ca7ce36779d2d64839676c9ce. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPCO01202150.
TVアニメ『響け！ユーフォニアム３』オリジナルサウンドトラック「つながるメロディ」
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a349f90127bd5f4569b5769bc20f42e28bf864b2ca5a1ba0b978acf86437fe. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPI102302823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d785a4838f76a1f558c2b02b2d50e171edf3e8cdcda388c5e4ad5b9e515e05d. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/JPI102402023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d95f9a4cd74e69bacae2ec2e76498b7181c163f911368684d6eb137de6c3ad. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPI102401988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7372f9157217bf1e815ee97c841eb76acf41de425bc33e3c70afcfba562fe2b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPI102402024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13184963eba1d9155ab988d633e9ac62ca90e6621cfc3f8f6b06e3bcfea302df. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPI102401989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18522b26a2450c2369e793a3ef3fbfc3d8860a9384ae9e5d6b750ee120ef0ce. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPI102402025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e311a6524bfb219946d5a45b858665ceabb1f515d7e9b3e00c07ec0f100e8a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPI102401990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeca9417168594d632968bae6a6583b1c7e790915ea7a4322ec51a76739fd1b8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPI102402026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54efa5281c69e694999a2c561cf0964047c4eb1f377c47fbf7e28e1ed8c81813. 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/JPI102401991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0148f2052123dd95e9656247ea9899172eb4e8b5eecc68a1143994143d642fd2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPI102400713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ebc06fad8ffc092afd5596d3ee36a6d19147458a2b397a5f078ece55de7169. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPI102401992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf619b2b705b7e47927147abd1e2ab002996760e9d2af3b6fb2b29e5ae03c2c65. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPI102400714.
一年の詩 ～吹奏楽のための (参考音源 Ver.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8e5a0c1bbeaa3668f15f6ff19d12a5586cdaebf5d72c3dd843204c0871bfb2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPI102402027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4795056d877843747ea9508c72f7848c5e8207efea944b86d470667af433a377. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPI102401994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b83d7f2283c0e85fca4e674965357012330c4e4252b9d73d5d6da0cf32ce9e2. 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/JPI102402028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa691ab6d2097f515f784adb2839dadf37a04866a111228429d2056879bbdcc13. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPI102401995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd036ee5cf0f536288e9431631d1896b7dee51004e6daeb16022df2978587b20f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPI102402029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5612679a92b48e463e5c77502d92c820f6dec3adffc28743814e9f9f59778c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPI102401997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d9e99b41e45989d78a876761638b69b27cee55c732e072b33ae739b585187a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPI102402031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a26db17a3c9deb2bd8741c437afe9127401cd3ffd9daac10907b3c37d91a9c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPI102401999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63162e8344f071318e210ac910af84c2747f4f52642a2373a719726c2729ab7d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPI102402001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cae892d1af27c534cebe8666d24a5576102adc1724c09b62d403cc68f171174. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPI102402003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0186ac714610a3ca51f679c3be39b7da8f8859a18616c4e19421de3d0b0cb7f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPI102402004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e149781b2770d7e225cb3d39424a05dcc4348dc92f3dfff5340f62162f5cda8. 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/JPI102402005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e51c82e6dafb2954bdce230882240d3c1f607ec6738e72eb23b2ca3cd3a877. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPI101500886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc3f8b4662969cfa17f3e5c16411958dec7035b173a03e63d93d563a01dd01d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPI101500876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc064bcc1bd921430d6479d6d1d15998b57c33ddcba197b2d04bb0e4f74d8851. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:46:49Z), 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/JPI101500877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68282ec5ea06c79dae099a157bafeeb4ce1223d20c275f3781dee5bd98ba2173. 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/JPI102402007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c71a3ea055aad9ef32a940ab1a8e07bd50bcbc6b5b678136cf46c219efff19b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPI102402008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88af956bbcafd684c42e77af02aaad648197d041f88029bcb1f26d4a6c1a870b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPI102402009.
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