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 0x310e58f4598d39ff342cd13fd505c3d706b79458c6bb1025f9752821eb691728. 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/8256e5fc-b19e-4bc3-bf5c-f65302242293.json and https://artists.proofprofile.net/proofs/artist/8256e5fc-b19e-4bc3-bf5c-f65302242293.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 0xf01e13c1671d0bf5650172df68c71fe7c27b83cf0af1a2c4409a7c162eafc688. 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/QZZEB2360992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f92ffd3afa5c19d6f5ec69631de050e10bce79ad968105cfbbe10bfcd391f4. 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/QZZEB2360993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177677279a6b96eb2331d4c7d28a28ee449ce8345d945bc1c25e03a105d39772. 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/QZ5FN2337148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59a607308de5ac84d9f32de72779bc42fc14c04c7795890b563fd3bc8e9f2e6. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZZEB2361008.
Tonada de Luna Llena (Mr Mill Ummo Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56265bf2757c595f37945c612807aae8f332c7ac2460dd750f2ae57afac199da. 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/USLZJ2164950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb4167426e28caf7fe4db8475135245a19710698b0bb3e9f7c8b93ff63574ba. 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/USLZJ2164955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0197d0a9d6a40e581508597f7aaaba13669a67445a1159d5129bf290ebb00d9. 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/USLZJ2164957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf23b2167252981d27dfdc5b2da6a8efe085b9c7d3b69ee04dce644cd43c7cb. 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/GBWUL2408175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177677279a6b96eb2331d4c7d28a28ee449ce8345d945bc1c25e03a105d39772. 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/QZ5FN2337148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864e85835fe84764d10b94faa0a1914450497642d3c72bb3156008229ea2ab6d. 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/USLZJ2559919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871b786c3d128d22a0777eef086d5e771eb314155c9b3a68841f1e0d9ee11ae7. 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/USLZJ2559922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d805bd175dbc35b8e4438d1bbb09073d32d9d3bac933fe744d517f6f5af2d46. 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/USLZJ2559923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fdaaf5f15c42a693218bdf6bf929fd3647b8876fb5a0a7a1b6df65d8eaa7f21. 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/USLZJ2560161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2aff8085b79a3df9c355ff1c20d1a6dfe7bcae96fb5b2fb9aac85187ac7a10d. 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/USLZJ2560197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8c4ec221e9c333e389692039ccf31d7b1143b7f118cf8f932960c217caebec. 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/USLZJ2560232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02a12c465dea79493b0e8c60633475cf03ed4e88bb90311736cf44daf481a25. 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/USLZJ2560294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4238db184af9c5690c3cf658953c86ebb2e1e33195c79e481db85132376f62. 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/USLZJ2560330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47000c1db002261e89345e5759c583caae128220af1d0e5beeaad212df4f3d43. 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/USLZJ2560390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0119703c1fd706222ced4d8c64491c40f1689bea4fc918be46af3ac95690ea. 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/USLZJ2560444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752cc91e3ecbf924aa53980f94fa0580feacb06c31a9f8f56cb99764c26530c8. 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/USLZJ2560524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02281ae45b375f5da9a7de10000d925c17439eef819d662f4e8f00d95b6c538. 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/QZZEB2421560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde59a2a87006a8ceb9690969618a01b5b1191970309428d15f470fa9b94ba42. 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/QZTBB2416663.