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 0x76497909ecf34427533e26e2ff4242104fe44f2e4c23edb21ebb8649a7d1d7ec. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be16d19d-1cf2-4db3-ace2-c57f39f2fe1f.json and https://artists.proofprofile.net/proofs/artist/be16d19d-1cf2-4db3-ace2-c57f39f2fe1f.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 0xa2e8600ae652b8cf27feece49d37c540d5a38d1a8333cc533ada2c02982cc792. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:32:00Z), 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/JPE562107605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020c0ad4bf3a13c322dd0a47b7b301d25b4a08694573632bf4d1473ce7469521. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/JPE562107606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd0547dcb31b29c9024c74ebf803576e837bd8cb066f41d8f8925403a9a7556. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/JP92Q2200089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac37c9cb46aabb831938143d07e3dfb64a0a9421b385642bdc73e63c297ba49. 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/JP92Q2301697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2594dbd37a84997b227d68a598917ef17fc51141887875db9e774d0a1950d3bf. 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/JP92Q2302181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0953cae4924522ca3e6e0c0731276652182c91da85d471ea14855f9705b8f4c7. 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/JP92Q2302182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3e8f29a725e7f8d49a8b2f222200b66ab852327fc62a493f97a5b9672b0b71. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/JP92Q2302185.
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 0xf63ffc844042b99a5b9e2584b1afdae5e83bd8d8ecbaac232097f59060010634. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/JP92Q2302186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5137f14b616ef3ab8565078bc197a48e83909f6362cbc30b08eee046d8cb29. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/JP92Q2400128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70e0a01e4bb9228e829fb8c040dd4bb45257a5f5a06cc04c94f7396b74728f1. 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/JP92Q2400951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76024bf24b9801f7b72571b938890a1fec9678338e7103f12f93612ab835cf6. 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/JP92Q2400952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848f5d75e680e4327d69dc6154e3efc6ee03ee0c291beef6125c33f92cfe3b60. 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/JP92Q2400954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5ede061ce06555c8a4c6d49f100f552927ca9c598d667b825f0c6841dbf12e. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-21T20:39:53Z), 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/JP92Q2400956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5f5b73db80d85dc139eafdd099e42da2deb6ed1de11707408db9e0f3cb08bb. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/JP92Q2400957.
アイボリストオリ (feat. 初音ミク+歌愛ユキ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cbb2718dc093fa093ee34686fc0bdf124a259a07c63d5b0dc230b49cd6c70d. 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/JP92Q2502201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ceee28fe0d1cf15831e65c14a6d98f8b34901eac50a704d8fdbf122e5445b28. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/JP92Q2502204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec813ce5c4cb6b4b3143ec5bcbc03e3c799d3e90b4308fac3026f927081b07e. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/JP92Q2502202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74bcc13eacac86b9c2399aa016d7ce06ebf55665c48725e0d4f37167acd227b5. 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/JP92Q2502200.