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 0xd6b6556ca5c5ed09395be0c1d4c904a45959ce2701d5440b4ab6969bbd7ae887. 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/80f4f6a1-4307-44f5-ac78-682bf092f231.json and https://artists.proofprofile.net/proofs/artist/80f4f6a1-4307-44f5-ac78-682bf092f231.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 0x013148926567560c48ff879b642e329f23d3b02d2affa0648c380af343836e28. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/JPU902101300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb31fdf87b552a91bb03d252dd18111f5b64fab9a7f4e2831799f59c273d902e. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/JPU902101301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f07c6c4a5e879733e31c411301509e414505e97f8be6dee7e870c174b20465. 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/JPU902104404.
シュワシュワ - リナ＆ユウラ - / LOVE MEETS GIRL - リナ＆ユウラ -
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8becd950717d1c3a8967d6a92c223e0a0499fb5cd1b6245a7f3edaf0a567c8b. 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/JPU902105721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4198eb6f94808196a792b94790b72ccee65fc9805f8c5d493bcd14e09d1a16c. 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/JPU902200640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3373a3392bc2f9e34f8813152f96fb9aad8945b5e86d64330612b0353ec6d50e. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/JPU902201278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e68632a4e47fbcb63898c3b54749d97b1f334aba8a95f43c94cafc4d5918631. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/JPU902202055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d6b16d91a8ea60b180fc32d5d1367d288229c066bc218e15d3775f345247ad. 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/JPU902205271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a6ffa1b593ac476d832b27e0bdedc4d7b07a06e4eaa589ec9a372b2a292ce0. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/JPU902300180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e33df45360d6b3a29d30594c2ce49dd88785b8022ca303102dcf5cf5f1f20f. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/JPU902400077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c920c2f84df458da3431fbf5f6c744d04d43ce6e73cc80efee0d64fd67c84b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/JPU902401846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc335a7800afd7e057e9534a45ad79ab7086d392ac12d0269ec65719f9f3e2a17. 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/JPU902403911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a7ab1f1b765cf0427c6703a8288c3ba58fd65126eb1e2ce4fead35cd1fa7e5. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/JPU902305448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa153ac8123abd058ca53a0541e39fc9500ee589d6e2334f33cea36c2e10c9946. 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/JPU902403912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e33df45360d6b3a29d30594c2ce49dd88785b8022ca303102dcf5cf5f1f20f. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/JPU902400077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c920c2f84df458da3431fbf5f6c744d04d43ce6e73cc80efee0d64fd67c84b. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/JPU902401846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3373a3392bc2f9e34f8813152f96fb9aad8945b5e86d64330612b0353ec6d50e. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/JPU902201278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013148926567560c48ff879b642e329f23d3b02d2affa0648c380af343836e28. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/JPU902101300.