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 0x0813168a0cd10d33bb5c74b1495c37022ded928ae8db27d3a57a238a97f5d7e9. 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/82677559-7c19-4ac5-8ad6-49b8d5dac4ae.json and https://artists.proofprofile.net/proofs/artist/82677559-7c19-4ac5-8ad6-49b8d5dac4ae.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ritmos Anchinos: Ritmos Anchinos: I. Harawi para Colquipocro
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 0xf612b4a67b71208d65503cec9a1632fc4c659d910fbb2d120aa3e799e3c0b8b1. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USWR40909501.
Ritmos Anchinos: Ritmos Anchinos: II. Charangos de Chincha
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1115a91bf0224f78a19214a24a2364ab5f7df20e1d8db55f6f4b7099a68189c1. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USWR40909502.
Empty Mountain, Spirit Rain: Empty Mountain, Spirit Rain: II. Rain
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9ace779caf48fd3f4dbd47939c74d14724b3c47e42d3e40f716b44b8970882. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/USWR40909505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cfdb90b0804bcd1942916aa761c110c3c8fd5fb22af6c3554af6a600b39a6da. 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/USWR40909507.
Air to Air: Air to Air: I. Wah Habbibi (My Beloved)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8559d3c52b04eeee667b0c8a32922d00067bc516b09a578a167c7815dc1ab6f9. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USWR40909509.
Air to Air: Air to Air: II. Aiini Taqtiru (My Eyes Weep)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8773c73daad248548bfca31633ee1190104f62a32bc27ef0f3174d45da3b511. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USWR40909510.
Air to Air: Air to Air: III. K'in Sventa Ch'ul Me'tik Kwadalupe (Ritual for the Holy Mother of Guadalupe)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225b612e416075e6e708f6b9a915eaf398be371102fd136f8b24e19708ca58f5. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USWR40909511.
The Vietnam War: A Film By Ken Burns & Lynn Novick
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbef8c9b1d1fbe6a741f5bb89e3f88d0ecc6d05aa7cdaa612a02a838f38bffc1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM37W1700309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a24872d6faf6a9dc7a71d0a6b75f9053cba3cbaf3344acaf2549ad81d5a167. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM37W1700310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d848aa6dd01302c6d59b5600bd453fa04dd3161bf9ce72748c0d7ca8cc4ae58. 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/QM37W1700311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346b414598a0bedb11d1584da240348a27c83110060c0a9bf7fd14dce2bb3789. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QM37W1700312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6558013f5712f958063d3a2aa42274be89390fa74792636a6a02a750c0849812. 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/QM37W1700313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4389deca2b0271f73f1c2d4bfd92296297f3287ce14b9f19e877e8178d5eb0c9. 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/QM37W1700314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41ea6519182eac05284d6a56acb57622e0e286c314f5e51c76ffa32a81f3dec. 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/QM37W1700315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6523939c1a47d155631c9cb2224f246902fe04b5b47e559ef2fb6ff14f045d1f. 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/QM37W1700316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c144f544756e35d2059fac908b1d6bf975e08277ef1f8fc60bd9b592e978d6f. 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/QM37W1700317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1fd6ec201bac6584959af4e16c54f01cbfa6617d65422bb1cf0916956b7fcaf. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/USNO12400589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e5eac6f8195147139875160bba567447a5779a5eb7a0d450740bef987cf6a8. 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/USNO12400590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c443766320b7dfbd78235a18dfdd1099bf23ba5756052606882479781cec15. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/USNO12400591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe8bd2cbbf668825b01acddaf12ee8a71bb0f08e9cb0125d516f3f4846f1409. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/USNO12400592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee577411aeab064e63f06584166e3127cf24b3cc8268c1b8bd914fb9224be121. 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/USNO12400593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229f848a816d606f8d6d4b37222dea71828dbaa5796b28b9eaffdbee8c94f523. 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/USNO12400594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4be553afd815dc6af9be9d30313d44077b8c699484d6b008f2b6f689c37702. 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/USNO12400595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938aef695f69b2d225aef63935fab6ff42bb2a7218e73284e818b3e2ad7c302d. 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/USNO12400596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602ec26e9613c7f7fd60b8fa62e9cab455881c57a7da8609d3ee7ad493749f75. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USNO12400597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6235918a18acdd0606800e0977e70e432b079900417c2dde1a47e35e6c9cd8cc. 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/USNO12400598.
Fugaku Sanjurokkei (feat. Kaoru Watanabe)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4ad3da52b0a11bbc7fa2e5e3fe3bd33c0c56dad8347221791f0ef1533e1d29. 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/USNO12400599.
Green (Vincent's Tune) (feat. Roomful of Teeth)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcd8e5a2b50d3d237dc13466cee823f38421f73e741565b121f532b0ed1400a. 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/USQX91503142.
O'Neill's Cavalry March (feat. Martin Hayes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b07167476c8dff37223728722e0dd3536a1d7c9e99c7a58a057e7841ffd6923. 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/USQX91503143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd810c1ffcd9c34f8b347c9c919ae88c0f897e2614654ea08e6b58626072d9b. 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/USQX91503144.
Ichichila (feat. Toumani Diabate & Balla Kouyate)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46c9f69f5bd247e6b707c34717644a2e8c254e40b84d5d15ef52d51dc245367. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USQX91503145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7a6cccd3b2c49cc74782159d460555d8c3de8c7165cf86369b69fe1b8fffbe. 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/USQX91503148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d6810e0017b4c69db44c97dc2dc03c93b18e2e76440c89728201571ca44937. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USQX91503147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20339df00c37f255be3cf3dca9c3684010382d14f9f962462dc764e3aa5c7612. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USQX91503149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e757da42623375b41084346f6e08fe7e7ee9ff2e992dfda3cae7001a0048920. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USQX91503146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135cc400cb2392ad32b287ccc51c881f423d73232bb8617c52ef60699c414b67. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USQX91503150.
Cabaliño (feat. Anxo Pintos, Davide Salvado & Roberto Comesaña)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47438115cea4b5a1495b9b958678f5707ea4b5cb44a775157a3aa2c051c941ed. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/USQX91503151.
St. James Infirmary Blues (feat. Rhiannon Giddens, Michael Ward-Bergeman & Reylon Yount)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b758de27bd8d92bfae55dd29be181443b91b40948a1e5c8fe7ef7165193e0c5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USQX91503152.