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 0xc9b43279cb17d6c54651b90860c024c6d5a9b8773a86ebd6795883f479c52b57. 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/c92edaa0-d73b-422f-b893-d3750fc0bff3.json and https://artists.proofprofile.net/proofs/artist/c92edaa0-d73b-422f-b893-d3750fc0bff3.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 0xe2a0ea17e21f23c98189aac867fc04465b2e57a3232f30908e9b6db11d1052bf. 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/USZZR0911921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9747a978972cef978c2075e87b0a4dbdaf71ea806e662672c39aae77d703029. 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/USZZR0911923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0541b7c5732f8bfc3a02cfea8a0c78bedd756218b9204d6902927130946f6d1. 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/USZZR0911924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb50784ef5892d1c2dd08d7ddfbd02ebb36e2702899eb50fe71c0648981fd81. 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/USZZR0911925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb04835f8354c70577012ffa253881cb1fa8ea2fc97e3d293766f525dc09e0a. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/USZZR0911931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ecfd28286872039dd5683b3e0442582b7b724a22904a5abce7e518943c48df. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/USZZR0911932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f155fc7fabf4e555cec00e8c5720b58c68b4658444ee95b2bbbfcb8ddd1e416. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/USZZR0911934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f4844bfab99302e60b54ee1707aefef14f8166c22d5a3fbcf1db21a00f9a67. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/USZZR0911936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98327c8f90fa133acd1c85de7d4f354b295744931c9a0074172c9a157509443b. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/USZZR0911937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d6b085558371ec640e6e3d4ef4bc59e98dbc8db598a5a688dd2a293b833457. 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/USJE61612487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9348607fcd6fed37334d963ae86f3852f6f5a896809c6aa3c7b87e6c7ba8623. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USJE61612490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3f0b948596d9f20c418cde4d72ae0a81877b96824ee5196fbdb2c08d8169af. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/USJE61612491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394e744e29511536465affa70a7b05f98e8ff702dd3eabf0d9fee38d8919cebf. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/USJE61612492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d76527671a8310e1d2bed3e2bce03f9238c1fed6fd9f253def2ff0a45405a9. 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/USJE61612494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc5eeb0d7174ff4807e32041623eb7c942d034b71689602643ea5c31fd0810c. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T12:45:27Z), 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/USJE61612499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc190cebcc7bd13ff802a932f22d15b0b3be5393acbb583411cc1425227e5a36b. 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/USJE61612502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0257402967cf90f4d28e40a26f5a023cf587c6558e92dd6b6af4e2afb80892c3. 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/USJE61612503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29513d82a991ad3f566094863ab2f89c66ecef175dca7f08124f2435a178b9dd. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USJE61612505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47358a0e920cf483aa1e67eb1f822f15e4e4fb0d8adaf247cd642583fb0c0d41. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/USJE61612506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a66918e94b6e03e0ed8efa40af32194f3a3b2bf8f6171c208d920a01e5652c. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/USJE61612508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87899879b3e3c46f1203ea396100827173631885ad9ea28e5813908f17bd26cb. 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/USJE61612509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc5a7d4e7a52ef90f12bf292198fb862f1ae9cd97ba2f4829b2081b7103125f. 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/USJE61612510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ffc7023805db02eb8b4072be4bcc45526782db3ae8c16ab3bb2ae267f046ffa. 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/USJE61612511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7047cfbbfa10be7a0ff1159720d65c94f3af604c1aa4e041a125255a7bcbf038. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/BGA261854112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295aaaecbcb3feb443be49e7e69d375a0e82c63b75180f5e2d11b4569d7b73dc. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/BGA261854104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca1067914f0df7d8234bcd75b27f7f2a427051b46c654a61cfc7c654be2cd4c. 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/BGA261854122.
Cuba Libre: Río Manzanares (¡El Más Selecto Cóctel Musical!)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1970cf58f8638996b62f54a43adf663c466d20cafc2e9c7904ebffe77c9cf77. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/COVM11610534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68634d2d485b8035863d97db643a28d388b4218b0eb33cb80b85efb01532d5d5. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QMFMG1374580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c0028dc42e8e4156c2a2028e636f325ed492dda73b4f9ae705752f0481f361. 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/US78T0504519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b38f3e7e44eb8b2bb5f096208af0fdfe9298a62950bc425d3fa31033042777. 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/QM7281418127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96b566232cc237f6c5099fe3cc3b12b7371a58b105dc6224f573ad3be32900f. 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/PLH492215493.