thumb|Wound Man from Hans von Gersdorff's Feldtbuch der Wundartzney (Strasburg, 1519).|alt=thumb|Wound Man from the Fasiculo de Medicina (Venice, 1495).|alt= The Wound Man is a surgical diagram which
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 0xeee1cdb32b78a2c47e0b196b45d3ac0c00354b7cb94cbe34e14fe3ff6ce4f66a. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/43fc9080-e743-4985-9d67-803f431448d2.json and https://artists.proofprofile.net/proofs/artist/43fc9080-e743-4985-9d67-803f431448d2.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 0xf0959a579d1fecda9cfdba4f26394c73e2261d8b0a6e1855ae20653d60efdda5. 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/QZ2YP2221902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd895488165c9d3a16faf03f5155f5c1ea6aaa253d27d5c29945af7ae8a1fe768. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZ2YP2221903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d9cb7da98ddc457bb895c169b60088d74945ea53d949665e41b5ad9c5a1dad. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZ2YP2221904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe88ab32214f5171ec9867cfcef33b5e7529cca9eae73d6660bb4ff6605d9b1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZ2YP2221907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7860490756e3a12b76dae5201bf58293edb3c705ef9481261336adb63fe95834. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZ2YP2221908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7898a6dd6ed6ab707a1ab48944883f86d876321450bb245f19daf9504305625. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZ2YP2221912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b3a9fd9c64fbb0b19f06d29070a70c7cd347552726d670020e19a414be35ff. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZ2YP2221914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0e1da5665aeca92bc801898a21e2162bff993831c3239ec966dc876843b146. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:55:13Z), 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/QZ2YP2221906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd85372a4eebf1f14fc962d9e2fe436125d5eb85c36a93a2e022d555505ec8e1. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/QM6MZ1958071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354c8060ac67327822950b7d784bd112e9b11235b9a5a917fc7e2e30779930b9. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QM6MZ1958074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42a91f955bde3f7304f70b0cebd27ad6998934bfca2d0a533910d722308bfeb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM6MZ1958075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44af9369efeec90968a8a7d49ca4ffc96e826e639e403a52ea77b7967e0c09e8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM6MZ1958077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8108c356f8835dd16ec71961e2082ea5a36cb231b95c77eb5976693b64639d40. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZ2YP1811501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f74660955e09a9180fe93b8c5399a7f605da91a8c15aaf7acd6c57d01d3a45c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZ2YP1811502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea44720bb084c6a16b005da90e730cb228a37e030b1727d8abe70c82a016baea. 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/QZ2YP1811504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747c8890067cb42f6eaa59a141f731ef6a15469f3b031a75d0cd8d2d08695fd6. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZ2YP1811506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe66ef03759bd218bc87931d0d1471ffe859ce22bb237b0c483daab494dfe97f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZ2YP1811508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3276844e24bfbd238a86d70fb040077618c55835a22b7f5ea295963a8c9c9b71. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMDA61839260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02bf8037516808a0073510ffb95b167e9214b63a7b852c3172857696e8bee428. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMDA61839263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d0f670fd12ce64d9fc1215eebe12f0210e39b00e1655fc17ece023c77cafa6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMDA61839099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98fc87ebcb02111dcab4870684a01a096f8ec99a74a308b9f02984fead58ea5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMDA61839103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66cc0f64ca57a639b908e7121b843935f9ef7c5218dc6d753c8fbad018a1851. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMDA61839104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0959a579d1fecda9cfdba4f26394c73e2261d8b0a6e1855ae20653d60efdda5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZ2YP2221902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc87db1f0c6216418b116dd5b0eeb10fd759ad2e562308b613c4052fc3d8aad7. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZK6H2123269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931606fd0e28c57a2832f783333580e39849d1f7bf03a519398dea8351608c2e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZ2YP1608201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9d371f3fa4b5d51e140d7c0f5001c3a56ed79ab9405e8db560599c6aadcbf1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMDA61839245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59566f0230e45c83e841237fb71ad16187d81788352ae34b557f224e479613f0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMDA61839247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67f576391729eade8f10cd0ca13e8cc5b5c0502801779b2c6fbe47069de5512. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMCE71303292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76a9c2090ce6887de2b6acdae25be90594f2f3cfe3b2f0e343efff4343771bc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMCE71303300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68680a66b26b642d705adca517f672040b15acf3c60833a17b2a76aa0f08653a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMCE71303303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e8546185c2492aedb6aeab78c644878b654c142698585d34bcb4aef3410918. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMCE71303309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e3ca0f2e61407acbb4e32252c0f40ab90b9642f935a058f918ee3300b0ffe8. 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/QMCE71303310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aec07e8550305e647a7d6eb1e06184f3bf49b0041df1f27d98d1463f19ff5ae. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMCE71303313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564479c9c7b6d74b4e928ddd9a201398b27bf1f3c9dd2c7e02cb8e8c08def2c7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMCE71303315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0fab585a3f8bef8ab5cc5ae13765b9532b097c79a9019b56fd38a679c525f54. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMCE71303317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee516aeee3f9047c554d91e80f52b22f0c4179a7e809661b3e38924eb68485e6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMBZ91944846.