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 0xcf3048ea4ca5dd18c58787e209bd703dec6bad3649cd54f76115966e8f7fd666. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb4b250e-95de-4da5-8f9d-30274055ad56.json and https://artists.proofprofile.net/proofs/artist/eb4b250e-95de-4da5-8f9d-30274055ad56.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 0x196c3591bb52c5dd28edb7c1b2d71caabb13a1237327436ea265f94ae669c188. 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/ES5371400255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf31dc71f6785c7ec5890717fdd8c2b2e97e5a02c555e6c34e17fd0cdd665807. 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/ES5372300125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7592f1c9ab1c94808421a34c80bd5728d266c29a07da3496e9ac255a006eacda. 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/ES5371400256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008790bec683fde6faab603e27212f74f309b8673516ec384d024007dfbd4c24. 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/ES5372300126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e71803132534c402239cb6ba4f913dcb54965480e1785c5edf894c403ab8b9. 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/ES5371400258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42009b0455ce40e03538b3b42081172e93073d68c70d0066a438ac232a9c40c8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:15:54Z), 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/ES5372300127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9098774930b0edb16b2fca27ef5242a0a4f1717eb051e092919fabc6bd1e124d. 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/ES5371400261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce74ae2ddc00463d7840c912984e2f1363ecd0453568f1c4c8d0cce852d77b7. 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/ES5372300128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b170b2fd617ff69d36a4c65a8edb3c2eeca5054bed9af3433f86793a6819fa. 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/ES5372300130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29585d8842c77f90c3191182d3b959203e7ce41aa71e0c4658c3a9df85f54e11. 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/ES5372300131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c8640c8b14841a77c4378350261aa6d818dfca1b372e4e864bf8df76de64d1. 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/ES5372300132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df328e426907e87ec737064490da6eb0eca36332b50fd6e63ba0aa297eba46d. 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/ES5372300133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fc09cdff51495b862fcf0b836330f86553ed8f2e3c24b2f60a1bc1441987b2. 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/ES5372300134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35bc7b9b2e416e1f11eb8a07d28e452417bee3127eb63c3cb0795fd0d3cff767. 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/ES5372300135.
Solamente Una Vez / Aquellos Ojos Verdes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32db0e4ea40e25d5b25b9e443a279da8436e220ceeb1ba0844144eeb611f135. 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/ES5372300136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce4ce1d9bbc8e23ef9f948732d8fba496cbc3fbd5d9715f047386cb85d118f3. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:04:25Z), 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/ES5372300137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd818f5c4c10b8f11ffe3d638d9d2d71a0bb9f16421c18c0263dbe2a725cc58b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAHW2463975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eba346121cbdf43d38ccd3d55572391efddf7d3f5b80022eb7967c3c27a2fad. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAHW2463981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b3ee02e97d5b35b5cb2b11f591f6d26b8f174c58c69ef94d772a8110bd92ad. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAHW2463984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08dc296ad69457ffd70ba52af76fed6c7e3ccd2b781b09c4591d2fc1cc5a1fc3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAHW2463986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3324500aa54ee23ed5e8e5020bb2617135cb1f34278e17d94806c0d27155c0c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAHW2463988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4bf4e64500e65703de0a206350a6ba0642ccf22383690fb532e5d57caed27c0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAHW2463992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ea59ca3a50711fa4605f847272f9e88ca59cffa4238df1ff36b95f635c6e0a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAHW2463993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05df05023af19f2251d917f1e12ddd3786b1140adf400e422182431ec51b3776. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAHW2463997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a15d4bdc032ea9c37c6e4893265480ee0336812b660fb8363122adf41d76784. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAHW2464000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98192b25c4821ff08f31686da2a76ba1a3ac9b5e1bf2339276929d976b4860a0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAHW2464005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45dec875a819596f726d9e0ea1f31f7928782bc5892d49f1c17e55f0df70b3b1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAHW2464008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e80475f1b0b10f58f15471342680e24b7158506d8609e36c9215cfef4d5c7e7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAHW2464011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a8b878738aa27a5e4bbf3ec107bbd7f1debcfa03d957985b21347824b7c10f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAHW2464013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64230c7818422a720bd0d7094e8497336e07f8f78fdadda72d701e3d3102606c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAHW2464064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7facf2afb08ffc8d4d96d89c3476e578334727277b42b63865e09bf511aa75fd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAHW2464028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b82df3baf749e53aee6a4aedc3af11197472d5ac3f068502726a7e8facc228. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAHW2464037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb83fad8947029a78775b33c9e69839aeca9d18cd8266f1e7bb5750ee8228204. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAJA2444475.