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 0x42fd85faa4e114f88fd0373f811f8f2c81ddafab835d155ace044843eff88e41. 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/f8f26226-7f79-45c2-bba9-a15c71ae34a3.json and https://artists.proofprofile.net/proofs/artist/f8f26226-7f79-45c2-bba9-a15c71ae34a3.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 0xe94f60492b282b619205468a1cd433ccd1ef2b19b9787337d39f17caf2184fcf. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:38:29Z), 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/TCJPV2397834.
0262816 (おふろにはいろー) -いっしょにとれーにんぐ026- (オリジナルサウンドトラック)
UNDER NIGHT IN-BIRTH Exe:Late (Original Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910c037d99223183c2022065966dd9df9344d22a64cd1f2de6cf7717b9b9aa3e. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/TCJPB1458643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7283420d693a57e15f74bc40d32b971c292cb1d9801790e170853616a85db07. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCJPB1458651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a778e131552c404f60d4d94d651841bebcb2d41a12259221787f5bb7f8e55d2. 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/TCJPB1458656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d955a577f3353ae93c6e76a335d216503a4b53cf0a64de3b2ee709dad8744d. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/TCJPB1458662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a43bc68f6eb5f84346237802074f3340f1b56430dcbcf0b79f2e6332a90843. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCJPB1458682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bb03a19932b081858c9a4604f926c435b09ba75cfef8140bdf78845c36ea65. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/TCJPB1458688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5e4f3d006e6db3515ff9ed70a873730fabc3701c0db19c9f785040994cf4d5. 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/TCJPB1458693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4df5790f7ea86d4623052472a8f8ef31c7529a1e489347cb8d74c5ea1ff058. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/TCJPB1458716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa596d63555beb363a0ec9ef3a80b8698b82ee4fa2f9e5a40627035e237f6eca. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCJPB1458732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad953bd842f4af7d88c9470f5e118be70515cc2246a08a2a4afbb9b1e4ada8d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCJPB1458741.
UNDER NIGHT IN-BIRTH Exe:Late Original Sound Track
UNDER NIGHT IN-BIRTH Exe:Late [st] Extra Sound Track
UNDER NIGHT IN-BIRTH Exe:Late [st] (Extra Soundtrack)
UNDER NIGHT IN-BIRTH Exe:Late [st] Original Soundtrack +
UNDER NIGHT IN-BIRTH Exe:Late [st] (Original Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7436464104c34d3cac1b254bdacd24b506d5f799161d97c88e634713a3abce. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCJPG1893975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd638fc725b76d09ec02c3a9ae187ff853b8903ae5f777f66c38daa58b55962af. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/TCJPG1893985.
The Legend of Dark Witch Vocal Collection
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b82ca44c6e4b4620f5b9609a1fe27dea56a2430180730ad91ef4307f414707. 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/TCJPH1869884.
UNDER NIGHT IN-BIRTH Exe:Late [cl-r] Original Soundtrack
UNDER NIGHT IN-BIRTH Exe:Late [cl-r] (Original Soundtrack)
Incompatible Relation (Wagner vs Londrekia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d39bf31355b4baef9faacbdf59251a08c9f92e8914b8cd7a56ac75945276675. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:57:36Z), 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/TCJPP2141118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95cb6952227b21f3086216324ad80a440218902dcab96f15f893670eaa7db448. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCJPP2141140.
UNDER NIGHT IN-BIRTH II Sys:Celes (Original Soundtrack)
Maximize Power! (Waldstein Theme) - UNI2 Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a905521bf15c8d74150261c0bf64556d74037f9fe632c56a233151b59d4ef62. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLRD52409884.
Relatively Despair (Hilda Theme) - UNI2 Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ae760e50eee7ae5f5c33d756ffb2d0f5cae88984d2cfbcbd2509a8d90609d5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLRD52409898.
Flame & Destiny (Wagner Theme) - UNI2 Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91532545e76b5e583e1a5dedb06e2cfdd9044ddb533a52ebecb5bb1f4b7b1591. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLRD52409899.
Keep on Shining! (Tsurugi Theme) - UNI2 Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655b58982cf4e33999148d81138b904bc24537fdc257c99a1287321398ec5ef9. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/NLRD52409902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4151dcd8e1291f423d9af1a9fac11770b6d0de9bbf9c4cb63c24cb453482eceb. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/NLRD52409908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdba3bc60a73793565947e7b572c596a35ec28bb182ab88e8cf8ad87e22d9f1a. 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/NLRD52409909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0b4f693cee2a60c5b6b8a7fcf4057dfc8218b17fd8d5e206f8cb9e70a0c04c. 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/NLRD52409910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a3db756840aca5b089b55fa07acce6f1ca08300fc7bd92da7681a09516a99d. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:06:59Z), 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/NLRD52409911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1f1edd6ab9c674f84ed21ce2288d19bee044098c8bf114fb4eaee19a01bef6. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/NLRD52409913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fcb114693d33142f8e37883223cb1f9b54679580e19f02edf1afbcc0ab09cd1. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/NLRD52409917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fe9765f61ae2e8467f042c94dc849e622ab040718021dd30dba7cb3aac26bd. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QT66J2514396.