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 0x710915d3728f2d9bdd32e85d17212a79b9f0a0fbf1c60eabeef810fe7adb0c53. 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/f7975fad-083c-4dfb-9272-48c5c7da9d54.json and https://artists.proofprofile.net/proofs/artist/f7975fad-083c-4dfb-9272-48c5c7da9d54.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
おとなになったらなにになりたい？
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 0xfd2a907d9aa3178b4fa515f1137a0ae66a539ab930dab6dfe2978257977d4965. 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/USHM92025573.
大地震だ！どうする？じしんのときのおやくそく
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b9b972acc72329dd8066c20f9d02997c50cbe0c527f77255e974df367decd2. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/USHM92025574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650587450b9b7ba6c9cfed6c65da9d2861e803150fa628ddb845b7a159179ea2. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USHM92025576.
サプライズ！かわいい風船ママに送る
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a6687f7d444fa6f9318aff52c16534a70b34a9d65aae5e77b6026e8c488e4d. 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/USHM92025577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c99da5a614864db3e033173af71a1c534ab4e61a7c70d35bdfb9f53a486fae4. 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/USHM22108534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50515e6fb77de3107120f8f4d338a218bb0046b6c0eb0b57b160b3ee6f5be20e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USHM22108536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb086f508ccae0cae9f5f26f866407ce7c69420c949d9ac192006110eb8b8e86c. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USHM22108538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b742e40fbfab7d33f70350a2d90a2e2316ec45024476419697e0b467b89be0c. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USHM22108543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8dd03993ca3137d7ee03d0da284ecaf5da2578e59836f35ca1d08556106ea35. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USHM22108405.
しょうぼうしゃにいろをぬってあげよう
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28889ce61a7865248ee21d5813de7853ff1bdfe0bdb2f05bfd1874c707f1684. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USHM22108409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f744d4c5f4fea7370af2908aadd5174539e43a106f354f082d68d8c9db4a60. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/USHM22108411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc35268f7f3674a491ffba77007729e522fe27018b8a8d33ad4dd23b6b2c768. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USHM22108412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694cdbe6ad790f22056ee7fa77b161ae946c90acd45cbb3152566ab2d4f17f7b. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/USHM22108413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c10a07b261101f10dc836e2b53ef366860a6e2171c01ff239c17883ba54ac5f. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/USHM22108414.
モンスターしょうぼうしゃがしゅつどう
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e57cbfb3f2011f406aa7dded93bdc3d3abdc762d629f880044bd676242d0260. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/USHM22108524.
イタズラモンスターカーをたいほ！
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc376210118d550247dff9d538735f298d4a193615031213cf42bbc5eeb68ad. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USHM22108527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9265cbb5ab1d6afb2fb5b79346b8ca056648092c9ff289fe338178ee8380e243. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/USHM22108530.
ごだいのくるまがけがしちゃった！
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d0dfe66f0ec04d750c227faaede0de9c192acfbbb1aaaeb652c6d9b48e96f9. 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/USHM22108531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0603d56b04e4aa283ed101c0cf3cd77cf0bd285c1d5f1701b56c7a9d9b697953. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USHM22108533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d96efc6bcc476f1616c81196ede1d4d494bc83e90f0df50ec6a7f688fb2aab. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USHM82220560.
おともだちと ドーナツ つくってみよう
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb2d2deea225fef51f0b45485c02512afc0dd26ffec32f06c669ff8fa219fcd. 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/USHM82220561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61104b6d2350c3a2ceb78c4dcaafeea6d6c4de8c68f2c2f8ef861b962c44b7b4. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/USHM82220562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720c911084d5539e6c6f30154960ea8783d987d3a53f91cc8b1e1e3f1a543e66. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USHM82220564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c55794444c7f8e578416a2262fbb0667fbcbc86c190c1fa445e5abc486ceb4. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USHM82216156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0f95cd47faef0130d621334cdb64f40196962d80a9b05b66734e210122f979. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/USHM82216157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea57c5c7b06e9aa22f38c88f7a2d087e6ab0eeb766feb0f503b708fc37aaa292. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/USHM82216160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac88152fd2d557ecc57ecf86add299055114b38f444d0e794395e02c9f930528. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/USHM82216161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12607fbbdb75647bd50779e78301b0f52e6e189b3f17e750368ad2c1b2bb12b1. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/USHM82216163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c81faae8afd0eb31b38ed4cac8560669ba98b43233e72d741ef8beb976bc355. 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/USHM82214250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0323f8e0f6ab49ae69107866151af0742b06f7d609cdb6b1a6357a77427907. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USHM82214252.
タマゴのなかから おもちゃが でてくるよ！
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0acadafa9cea335ad69267d0fe85614ae69fbacf336b1a17d656bbe2ee16103. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USHM82214253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998fc401d9165133a6661984cd3aaabb2129acebb94211522abc19b4910b70cb. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/USHM82214254.