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 0x5ef2fb3b36d2555c47b77a649bb4a606453a712015540bd04c4e1067254e66ea. Chain 2 (Bitcoin): anchored in block 953794 (2026-06-15T13:43:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e071994a-9799-4f3e-aea0-88ebdc89612b.json and https://artists.proofprofile.net/proofs/artist/e071994a-9799-4f3e-aea0-88ebdc89612b.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 0xd6556796439175478f487bd504882a011304a40922a12c6f015c8c2035fcc7b1. 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/US4XG0303590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2684ca20e8c9071a3168cfa70d2ef8b4a23e56b238b60fb964e7be88be13e56. 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/MXF171100879.
¿Quien Ha Visto Por Ahi Mi Sombrero de Yarey?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883a7f75f41786b97852c2ef7be8d2455e63686ea1cd1193de14f27d4cdfaed0. 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/MXF171100927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21fb015cf38f5a94962a6a6ac515ca8456125b9034545fe35862fd34d6d28be. 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/ES6601404003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25f805c0e58ca4d4460660ea75b72ef7d9f506a817f46d68b5c119eaae2c669. 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/USV291451958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51ef071fdd70e7fe62cce44fa7e36e7d03549d16ff2745b2c5b97cb8c5c9735. 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/USHM81751319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312631a1e475af21d2036ff98b0e843bd1b4872031fa5de3eac3fd600fb0c78c. 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/USA2P1558251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8272fd33ea50d188a8ba5db5fff51c4c2959d3f9d1a9176da9b5f2221fd0d73a. 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/USA2P1558252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4dfff9033f195de98f24b63ccfb0185f619149e63a0dc1c1fef6e0e8a8e6b53. 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/USA2P1558261.
Vintage Cuba Nº 74 - EPs Collectors, "La Voz Del Recuerdo"
100 Años de Boleros con La Sonora Matancera (1924-2024)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc593652784e8695edb9a72c94a71f451979dfbf37897ee2c633e2d96aa764191. 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/PEMG95201002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bac40e44b3b9fef191329bbd21a1992b658c8c5e973097da5767cd687f33e07. 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/ES5831710315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3238e885a11923459107750f5e48fb2710295c6ce26882fd8390539f980191dc. 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/PEMG95201009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482f4263e6b5388c71da3fac0f1519b4f61f40476b6102997babc6fd137c05d3. 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/PEMG95201006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90edf038661de84d947ba58d1128489b188ff90b7bad70cc54e93923ab71104e. 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/PEMG95601012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fc69c845527c166b2d016dc6fdd2d459708b9f29cb1aa5e827c743bd8eef39. 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/PEMG95201014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab543e93eff67b5d9b1ade7b0c94c07220a2b2593e80c19cd97bade81fe0051a. 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/US6R21224999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ba6bd600feac339a344eb69cf19d15e9c1417f5f671c4fd1f803b236862cf9. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/PEMG95401012.
Amos & Señores del Bolero Matancero, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25323281ee2d56117dd4e32ed6959579bc0e53615e7209503875608bf45c020a. 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/PEMG95401003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064aa480a7bed3ec343e1c39b757cd791eef66703d2120684739a82f0a80f89d. 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/USJ3V1495936.
Serie Cuba Libre: Ernesto Lecuona, In Memoriam (1895-1963)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc39df4f06a4b2738b3c35b2997824e0e2f8320fa6e3502b6a4bee141ef3eb8a. 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/PEMG98501011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff1a1ddf502c06c3217dab83b5590092889476c8f7e37c1b99ac70687418497. 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/MXF330910980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8301ca1f735d225ed77269374d1b7e7893946256db51be03d4bcf47681337beb. 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/ESA011940993.