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 0xc971c2722a5a1f90b6cf764a5a1b86970b1642522bda0d81e2c36e126a1737b4. 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/1f561977-9bad-4a53-9873-20b3fc5b2ae7.json and https://artists.proofprofile.net/proofs/artist/1f561977-9bad-4a53-9873-20b3fc5b2ae7.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 0x1cad4f620968820b6271ac5f26d72a5eac03dd1586cc277f4243f55376520ab4. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/ESA011912025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d54ae6197573945372d4271087a68aad1b1ec6286d67e71cd7ca5105f4b6549. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/ESA011649889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeca6e7ce24936dd9d8b0b50729fbf1c8d4ceed96920f66fb51256c876e3cc34. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/ESA011912026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21638e8bd72f44c57c446297c13c9e69f7b63c352d968d70486ee0b95e9c53e. 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/ESA012067012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0ed3d1dc3af70b2838514b8839bb19c945600408ce3cb8c21bde41a1769712. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/ESA011912029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b670f6e7a0d64b58e92308a837dc9c63907750ab32fec19a39d74a9435696d. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/ESA011912022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1494f0c390a0df81eaaa57bf34bea7743f934d2edc6bdf99b957073c26166adc. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/ESA011912023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeca6e7ce24936dd9d8b0b50729fbf1c8d4ceed96920f66fb51256c876e3cc34. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ESA011912026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2fcce498342b56da870387639f5f4f10eb4bda48749ce2f27272fb58d93af71. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ESA011912030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9502d0561988e538d5b34fc25d2f2345c24aba0096dc36c8dacf7240a998d62b. 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/ESA011912031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18060b932bdbab9320c8115e8ea385a0ba13418e2982576547a60253822489e0. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/ESA011912033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b025cab39bc47ba585c36af0b44db2b143b8230056cdc64e9e26ca9ef2756d9. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZWDW2335917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2635605b829b9f0a84fb9d3cf0516f0ca5e8963e201f9577320510ce622bb31b. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZZ662315401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238f2aa9eb53ff8e81b528c828f3f20f36e9afbf2417587dfd63ce92f34dddfa. 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/QZZ662340769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23fa2916f1444bc60ccdddff6d87024cc31484c672cf38e2947ff912d41079fd. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/SE6I32429970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5999bdf75191c761e55d6b66cd14ca3f6cee9659e4698792112fdf3e786b74. 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/SE6I32431091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d35822b40970cb31592980f0776f71865e6250ee7ca8e0b883454e942e25c1e. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/SE6I32441957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6ec60c91420bdfa089b6acb51aa6982c353dfd642237cd2a1df63c4eceea69. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/FR2X42542003.
DE FARRA EN FARRA (2025 Remastered Version)