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 0xb989e76c666c7bda71499dc067a8de01288bb9aed52c0c008701452cf44c97a0. 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/376926b1-40ad-44a0-97e6-18cb981de33c.json and https://artists.proofprofile.net/proofs/artist/376926b1-40ad-44a0-97e6-18cb981de33c.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 0xbfbcd3db975914d6e56cebca540ad3ecdb8bf6882e3d09ac4ae35661ad0e080a. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZ9JZ1795767.
Again (Fullmetal Alchemist: Brotherhood)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb4fe006440dcdb1dbc8d909cb3a046eb618b595be9c9e8175aae3cbe7c721b. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZ9JZ1795768.
Again (Fullmetal Alchemist: Brotherhood) [Full]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7342fa7ee66457d81b0c3f3ecb83db8011989c2bfd509a6d7f4eb176838195f3. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZ9Y21778950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80914056ed993196451009de5df47f98698b5f0f6f38272abab93215eb4303c. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/QZ9Y21778954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d2781d4aefc8579340c40f7d52787dc57817aff9f5408b3b642a7b3903ec66. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZ9Y21778956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4aa0c230c1b9c27745132dbc6c2bfada2c1c552a35a121e6cb52eb305625083. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZ9Y21778958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b53cad31eb2062db62ef9acfceac8aa0b5ddf445ca5afb70ac25aa6eb1d3fe5. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZBRF1847689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d24cb323272949287d55ef8922e1cbb24354a9fb5f9ae55affdd8f3a176210b. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZDA71880283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3035d4e9a863ad48bfdccccb98278ab7f2cbbc7a8c5ca6191be92b51dc7cc9. 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/QZDA81872573.
In My World [Blue Exorcist] (feat. Romix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13456aefcc7efc7c1c0bcf4379dab0860f132e73c1c89b278ce5ed7bea2cd84. 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/QZFYY1930320.
Resolution (Sword Art Online Alicization: War of Underworld)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9007d6a55010f4de51cf303f7b2c2515608deba4485a56f477fece50dbc837. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZDA52056757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c086999866c6b524e21b3c44d31e4511adcec40ea07ddcba0be289b26ce4e62. 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/QZHNA2027287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b9ad46f630b50b0738dd79e7c9f6218570a91a003cbb60c8444c336d79faeb. 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/QZNWT2002141.
Identity (From "The Promised Neverland")
My War (From "Attack on Titan Season 4")
No.1 (From "My Hero Academia") [Instrumental]
Footprints (From "My Hero Academia") [Instrumental]
Zavodila (Friday Night Funkin' Mid-Flight Masses)
Sing My Pleasure (Vivy: Fluorite Eye's Song)
Release (Friday Night Funkin': Smoke 'Em Out Struggle)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61e0b8d6687fc1bc4838bf5790043e9c6ec14e4502b2b26ca3c3027e554b21b. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QZES82257885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90eb282e9df0914571c56f4dcd1804b8975e711222b315426aa9ecf2ab8b8a5. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZES92252409.
Bring Back (The Rising of the Shield Hero)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ccdaf510dc6805a686fc59a207ba51fe8a24d675b38ded6bc368558246be3c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZPLS2298028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb0debb30c7989b7637f94438f8b926e32215b24bc2bbfe0cdbf4e1cb34cb74. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZFZ22364708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa260f474a9c42a19515dcb0ffe7a59da2aefeea9a1b696fb1ac8ae27317b92e3. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZFZ22364711.
If I could be a constellation (Bocchi the Rock!)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa029bc98505bc2f1a28baef827326016327f7867c4188283f059eb6d80388e20. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZFZ22364713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f69772fc9e99ba3edd23c2203716222f74d9477cb3be95223f27c327bbfbf56. 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/QZDA52336233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5f95ce5dad5de51376fdcc292d0f12becd173aa4dc24a8cbb8ef474939b967. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZES52390901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabaf06fa705b5a1e44f8873b00dc49ef071aaac977c7fea42e0145a28aff4e67. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZNWX2314545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362d64d7e57a0f4b013c6a702541a59f4442fa7cb20be4ed9fcd4506a3a680c4. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/QZNWX2314547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb48e22665cc7b532eb5fb350f8edb2220006d010ea061edd43eda2763104ad0. 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/QZPJ32452473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634ff7430c5280b6a4a84466129d62f6e71b71388a114363fecba5e5315e606c. 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/QZPJ32452476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87077c849ab10c9792978953dd9ec4f3477d371b39d1b817cb3003ca5df4c8f1. 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/QZPJ32452477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416f5106a1ccc830087ac8857444a3790d63ac347cfa98ad4c4f8560096c9166. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZPJ32452479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e938bc873de811c3641bf25a9100004a34ba1fc79cca12962ac14efab0edabd. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZPJ32452480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e63484027ab17b0988e60f30087f889e25dfc6fbf7fc4d079fb2a97f01dc9a7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZPJ32452483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb62b3ccb9965cf6cec3ceb7349c7fd7d094b15e9f103cafd700932fd70e306f. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZPJ32454277.
Ready to Rock (Rock Is a Lady's Modesty)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61b472479a837310aefca7ad738568a69b1e378500b3f41b8c02002c80b2fe6. 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/QZWFK2599745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33f2fcf7f74d02c22946a08de496d8d6cf238204b574267fcdf75218aeeb622. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QZPJ32515865.