Events Below, the events of World War I have the "WWI" prefix. thumb|120px|right| January 1: HMS Formidable, sunk by a German U-boat. January January – British physicist Sir Joseph Larmor publish
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 0xc8d5b002f87ecada91f11799ea1706b386c02ac08000e927328aca9ea7787816. 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/8c21fc2d-2fb7-4286-8377-3ef1e8fb12b9.json and https://artists.proofprofile.net/proofs/artist/8c21fc2d-2fb7-4286-8377-3ef1e8fb12b9.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 0x9ba2a9bae773980370c03bcd119ba6de3326e9b96ee5b7e1c6244eff90ea8dc8. 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/US7VG1652721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e4b01212abfcf5ba4fcddeb4dbc03a4dc2eb696824bc69a5ec4c4486c8f179. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/US7VG1652722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65abc8c148694c48f35ad61d342a375370bac5325a605e83fcf8883f00af50d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/US7VG1652724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb501597866bfa0873a52facb8f2b2ecc604522d53902cde6a761925d4aaceb85. 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/US7VG1652725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c876784c22fd19fd5e1ce0973eda91c86d6bdc4411f6e052ae3ceedd44ad49c. 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/US7VG1652726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5266f68d08071c145c785d0d4ca44c719333e9362703c4d2f711836bdb8976b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:53:03Z), 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/US7VG1652727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866390ceb9497dc3c5cced09d96111eb952bc796d4c7b21823373d8cd58a6238. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/US7VG1786276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683c4754d00867ca1fb723e0a37f3629af2aa2e76756227ab39396a77c6458b4. 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/QZGLM1931246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3260e07ccb9d6615d5b5f74e56db419951468a8f5b77cc3eea4e97d6f08210c7. 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/QZ5AB2066777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc0bd2ed9ad1a5911a2e6bd8278c2940b7583ae34b89f051ecd4eb89f06a230. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/ARC082100070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8efd670c20b3da27023fa11a3592ea77da2f98e359243db495e85f38eb3c004f. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/ARF102200341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2e45ac2f5b599e7154a3de45f8b4bf0692f5d2e8f5226918a341d602bbbaee. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/ARF102200400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d5922286afb29c67d257ed8f415ed95e84c1a73879cd9e5551aa87e900107d. 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/ARF102200403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb3bf7801c459c53e92ac25fdf0f67eb2d1e7eef8a7064222a6416d16385e03. 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/ARF102200404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5472b464d13d6c470d4c8f921956ae1c30f0eae1d9fa5921b0ad9a4f3c1c575. 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/ARF102200405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e4cf6325e01d87e1ce9e3576cb3f3d086134f608b779308ded114bde3d3244. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ARF102200406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef540e94bce42279cff14701a345f91684e97a09f6c9e30d218140ac40ab4c37. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:27:43Z), 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/ARF102300386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb91fa28b4faf6fd92a2ed133cf534337240fe4884e3d422e228dcf28acf686. 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/ARF102300388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99dd2ef65f1c2ac08ea15dbde68c80e6e2b2dfdb46566e4d84a3a97a67beed36. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR9Z62300696.