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 0xb009bb9cddeee04b3ce1313828503a761b6cd5dd3a0919d552821eb518122fd8. 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/dc369ae4-0273-49c5-b9e1-9e086754eb52.json and https://artists.proofprofile.net/proofs/artist/dc369ae4-0273-49c5-b9e1-9e086754eb52.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 0x0c1afc16fa816fe92b613e97ff5ea71f7a68ca33290badbe3895b41dd459ec10. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/NL1AP1951489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d2d0b400f550302404bb2f7553d0a5c27b1d5ea775f9d68fd59b2c5611492a. 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/NL1AP1951490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5e41dfbea1298a946cbfc3770f801cb96f945f9969093ccb0963f85f0683d3. 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/NL1AP1951491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd5e0fcf4626e128e687d3425f1d21d21c071306aa28a918b6afb3a3bd2d35b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NL1AP1951492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e102d1536cda5b09fe00c97cf62461b8b9d9e36e928ce9619c67c12338badbd. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/NL1AP1951493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2365d294438796160adbd6c66f5db52b1f40d716461751c6aae286838a0098c. 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/NL1AP1951494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90b446fc6ba3ce1cdddaafc4c12b544cd4da28fb9cc10c18e08e022a0e1d459. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/NL1AP1951495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0ed4de029e23d6dd9e0069ac4b779e2b9d004470952ab285bd0273866dd048. 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/NL4NL2007585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a37bdbf92b00f52640d2a91e16b9a63f9b81c3c9c81249a5c308dfd241283b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/NL4NL2007587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3888244d6c4b22750d6d460187c24113fd57a64ab0e505c0dcb381d7c39abb89. 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/NL4NL2007589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7ddcab99e7110d087305aaca793f7961b642443d7074a0b7b761256d43265c. 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/NL4NL2007591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7524256ace6e9dc3758c0a735b90c32850865c9298163a7c0d8b1287fc59f19. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/NL4NL2007592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f10738522cd7b0ba625315c6ef529d39a2c17728e8b0b9de956fa8dd86d9b9. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/NL4NL2124972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c54456fe2b638885cc712e8e1ba7dc5db255201733675910cf633f72ec3b9b9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NL4NL2135219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd0022fb0b2b85a4723238edf0786276fa5e6b876c015498eb6090f1f93195e. 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/QZNWQ2164805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6059f5fde11a46a356ed2f14a170574923e373d5b213985ca807e66d00d819. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZHNC2261719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa9ea82cd377e55ecdf8e1c0625e1cd4ed91439952f621b902a7eede6f62297. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZNWS2222070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7f3d847f35a539ab62880f1ce54833f3cea0b0ab59097d1bfaff395dae8f09. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZNWW2255863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c41b9a7c2465c2310c03e0a0d45baf09b83499a0a31e8cb2d75e6ae7885629. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZRP52269450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8f82d48671c1028b5063afa51a71ce16b48d48032f3d57e167ca18bc47bcbd. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZHNA2364658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef264ea32554bca1c2083c4e8da54db192cf014880dc2b09c41ab42cdfea2d7. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QZMEN2353520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6a879d07f53c6cd6ed52fb4d7f08d4f823ccb5da199b737913d2fe475309f7. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZPLR2302089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0159fb7f04742a357c7033d437cf017abd02127f349a6b53b4597d2fa104bf. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZES72256244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef264ea32554bca1c2083c4e8da54db192cf014880dc2b09c41ab42cdfea2d7. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZMEN2353520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc566ebfe7468f4d23b65e5cbc7fca802c1cf92e89cdd80a4952f293aa914afa0. 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/QZPLR2302090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7f3d847f35a539ab62880f1ce54833f3cea0b0ab59097d1bfaff395dae8f09. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QZNWW2255863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c41b9a7c2465c2310c03e0a0d45baf09b83499a0a31e8cb2d75e6ae7885629. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZRP52269450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2729ceec4b69a53b6cfc4c170af2c1d364723e2a0a7350f0c6354ba9c52d2a. 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/QZPLR2302091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4892b94fc88212b3388dd6b4b75075d53da1cec7448f3cae88eeba907161b958. 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/QZK6N2451812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa49695273a8e35f32902278e1bf6749bfd2ed545f3019ce81db57a5e09cbe5. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZMEM2427514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55db253cde7e13c48bc67e9f23e9dd2278868e0f9c60fb4d2556cb4034b9ae9. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZTBD2482179.