thumb|Cardinal and Theological Virtues, a 1511 portrait by Raphael A virtue () is a trait of excellence, including traits that may be moral, social, or intellectual. The cultivation and refinement of
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 0xdf114622ac61899f03c46bba09df47d873913f2be5050b5a9461f349c63dd17d. 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/859a064c-29b8-4607-9be4-91fc6c1f3da7.json and https://artists.proofprofile.net/proofs/artist/859a064c-29b8-4607-9be4-91fc6c1f3da7.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 0xbd00313af7cf6c3e4583a434a32d9eafdd47582dd8088f2f1db81c49c0c92a52. 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/QZTAX2231212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f4250ae86316d358a95dcd8344d9f0ce4cc89d517f09967ce8ec644e88cb9b. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZTB72222642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0d9ae9adb9778a4f22345bd04ba7894d25531e002e435397f4f0ee86a7ea5e. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZNWS2379668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633999be9ebe5be4b49d6355e40e50531e90098de22cfde92abd855bf82de3b0. 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/QZDA62459213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa841070b476bece3dbf530736b069f7ed2e9f5da33c00a2400fa183c301c7063. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZNWU2472958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ed5e1125a773d6d61255f67ccb718beb93968db470ce5300ec26f3153f6c06. 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/QZTAY2463877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c185ed854539b8da50f376b3f51e1a7b6ccc9285dd073c791886a7aa1d60420. 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/QZTBC2405717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd81df3cbe05cae9d49f99f641a8210636491195bdc97c8d3f1d796e3bad24d. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZTB92477315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33b77073c7b9f23d01daab41819a9b3dd4de68595df788ca92284e270bc23fa. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/QZWFF2436154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31f01cad1a77559c42459aedab9521866584a61c78b9b5d3875c110364c7aea. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZDA82562097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6123d1d6a1cbe911dd2f758488905cba8bbbfcd7b5e3963ab5ca58dceafa5be. 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/QZNWQ2525380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4caa32059c0c3d4c6383cf2300cd9c8c0bf8ea31dfc7086d092ac2a3eb1d6cf4. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZTBB2552167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b00c1527a60af6ba1feeb43c0d72b30c41d76f8477ec93f21987b0556aff647. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTBB2552168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e67a9a588383c9017ca810b48c065b934ee1db85f3112e922be4acbf3621fc1. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZTBB2552169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc3712ffddef0e792cf5ff5e6c19805c2aebea2843fa5ba381b1273c56d8d2b. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZES92519558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31f01cad1a77559c42459aedab9521866584a61c78b9b5d3875c110364c7aea. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZDA82562097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90aef3a12f492ad0c9993bf324395beabd73d4b4ce913a6da98349daa17c1d9. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T13:24:39Z), 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/QZTBB2552170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b0d722e74425620d21059186539ad441e93e43096a8ea00791b408658349de. 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/QZTBB2552171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4891823f802136ed3820bea00483d780770af6fa39a79a6b4762377acbc37e10. 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/QZTBB2552172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc547cbdb2abe5e9c5f8ec99c42193cb5290dee00fedcd2ae498faf03087ef1b. 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/QZTBD2549242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9243f900a0a7df4fb5a515c5befe36b27c649c2df5ce18a1c87fb2bb107339. 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/QZTBD2549243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ce424f8cbdc24e4d4c1a0a78bdc869aebbd32bb35c028e75290ecce852ac4b. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZTBD2549244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902ddc7ae33961a330c642560740d3a5450b9a883cc429a7efeec73499f19d2e. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZTBD2549245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed6c2155afe965a5e38c5bc3eb10a9581e129e84c567f6e860c6f176b18350e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTBD2549247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7980c85e654bcc9087c89fd31c0415b0da7bfd45426e245e5097e60bce005755. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QT3F82582044.