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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd53794c1bcbce1c8fe97e4a5d28add6e87fc047a3c8d0060c14930babb35f7. 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/2517aed0-dffd-46b5-9c69-cc2f5fc17660.json and https://artists.proofprofile.net/proofs/artist/2517aed0-dffd-46b5-9c69-cc2f5fc17660.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4ba9ca0d82433aef1c7b04c9c47a07bf13d9e028425627f1fcf60f71f5e857. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USVE20300099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4b743c9699045a7665f72b2794ebba88f0b3d15346ebd4de7a046a3da9e030. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USVE20300100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecdaa5f8883074bce1bed6a5a3c0f06ec99b26aa2ce8e49656302eb6c73878d6. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/USVE20300107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bfa5a808103043bcbabe0f9b132ad4e03097902859f354be3c6a106090dee73. 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/USVE20300102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33234f4884bbddbff755612c6aeba761769e5ae9cfe83d87f531dbb7e439e6c. 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/USVE20300109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d95894165d78a72dfcc3041d47db014ce0609249fcef9c146065d2693fb5beb. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/GBAHK9700183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d741ffb9a338293610d09b16d3d9445b7bb89b777c04e1268e9a1bc029826e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBAHK9700184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f57841b851996132c4167b1a582b25756eee41babae02e4c09081ca01446bf. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GBAHK9700185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5e218b8db25012b3563b19199d74de0d2cfe24c57cd682589f052ba0e0ad26. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBAHK9700186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d8c755d194621d809f0f9e3709a30c91ada9d0159f8c88deb06ee83d6366c9. 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/GBAHK9700187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249c939dd487143262bb41709412a16ee2a06c6a7ced9f003b9ac3c7dbdc5af1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBAHK9700189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9318c99b5509c63082b5a3bb201c92a683d09fcd6f0f4f7607a21155a8f256. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GBAHK9700191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935eb3eedf0cba4250b87a85392dab2f35cee7346b685d2c5ded40de84fc30b7. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/GBAHK9700192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7c0db046c30b953b4692539676863524e500a3f6a0d2bd08cf019f4cdda150. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USVE29930231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac902c6e93385874e2799cf496b156ae12d865b0b314684050c65477f0db8702. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:13:32Z), 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/USVE29930235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8874e07263c3e6116226f2a0c1f06d79e3228a298cb20fe7c7a2407803b048a0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USVE20100162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae6ad512b7f689af477ff3e04e04f7a29260790b68083595195915ad48640fd. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:18:33Z), 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/USVE20100166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7c0db046c30b953b4692539676863524e500a3f6a0d2bd08cf019f4cdda150. 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/USVE29930231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9ddeccb18026feaf790945c79daff8c75c82c918e441ac8cb887eafa84c251. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM7CB1400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045313d3c9c3baefe33991f653f91261a094b8d151e0a2e42a31743a592cf91a. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:31:23Z), 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/QM7CB1600031.