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 0x99a00bdbee368a3061f133cec0980fa8349f109e66b473353d398feaf2db7cf5. 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/01aff56a-1e77-41a5-a9f5-6cc70fe30dbe.json and https://artists.proofprofile.net/proofs/artist/01aff56a-1e77-41a5-a9f5-6cc70fe30dbe.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 0x064071bab8ccbd62028d14cf48e9444499c455d608ae356922edec66b3df075e. 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/QZAPG1747881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2189cdfcb2e445a33e75715157cc9d50267d3ba0a9c596e45f5343523a6276b. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZAPG1747883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55243c7cf129a452c621e0246451fc37c7c2ea7750d84bef8e23e0e0ee3b041. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:22:12Z), 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/QZAPG1747884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730bde5eacaa3232943bd9a484b5f623fd8dd12b6e0bff05455881ee614f69a0. 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/QZAPG1747885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4e9e76cfe2d6a662fe0730431e66f6aed24c8266c2b495b1fb17c88be381e5. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZAPG1747886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e0750b6df82ffec6664f0c19a206078b4ac4187fc7903b884e102edab75d4d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZFYX2078637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358e449d17992c8892e50facce26a8baef9f8abf31b8794f23cbc95c639092b1. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZFYX2078638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603a53524937ae620701b758ed47cb3f7be2b75559ca70f65cff335dde2d80d6. 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/QZFYX2078639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9b35ff0007a3388175f69730a132aad97499a9aab1fc2bc6cd1ff3a0d7226f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZFYX2078642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c8368dea254f5b8cbf0cb2248a2ff5072e9503a3d789df961be1815e302bc2. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZFYX2078644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f602d6a7c2f178da2ea34d0e9fc77927d9c09be0024da83b734631b5c4d426. 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/QZFYX2078645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8557723064a0b0400235599e71a3eebddfde483d491c0abdc99409472a8ec03. 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/QZFYX2078646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ed0c53d0705c72cc50aa51320741943c64cd935c7f977ca6d838c195d36c70. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:23:47Z), 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/QZFYX2078647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00be48a0d226c32cfffe82a699891dc29941dea3d34237159be9531d07e6c1a. 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/QZTAX2390831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c9a11579bbfb9fd94daeb1e3937859a6634b1ddbea837ca0032f894da24eb5. 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/QZK6M2456410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be3fe4b20a4f60678807459a3b3727ef8218b8db830700f76d2249d46a9584f. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZK6M2456411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f92199b8c3e0e1efaa06f386d6be3e18aa804f03f8a43d3ff0610c05f2f6e8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:51:19Z), 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/QZK6M2456412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e75b436f75761f1cf2883e398192e18e97714646d5b37da6ed34418f513fe5a. 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/QZK6M2456413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abbc4ed27ce549233648bed52a5d3874cd29d28999b7fd5342944565d02ac08. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:50:35Z), 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/QZK6M2456414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd07b0941ca7a46199beac44f1c57de4961da56fe776db862eb53e1051dca9db. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:05:51Z), 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/QZFZ72573143.