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 0x9801016164a95cc754b0964222cac4646aa0d07814e26a3aacac2ef6136d3a47. 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/d0622607-c003-46b0-984a-3b738a69e019.json and https://artists.proofprofile.net/proofs/artist/d0622607-c003-46b0-984a-3b738a69e019.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 0xa1ef65d8f4202d72eb790346160642a74145951be2e59d6cbba3ce8e68db8225. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZ5FN1893907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a28cb5edc4b07795dfd1d7616ac6d78103edc1256af4b4713dbb111cd6a6ea. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:08:26Z), 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/QZ5FN1893880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc961dc2df7e8886e80b9a4ff052254c7b869b511087eaf19a773246eb43e037b. 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/QZ5FN1893829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f522184d79d407f00c1b6aadef65748bf9e1c262044a54809b501fedc659c86. 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/QZ5FN1893892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94e1adf9a8d6d0de97ac988ba939be8443bce9a7d670cce8ff4f56611718d9d. 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/QZ5FN1893881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4aec46b3a8f169699363a2451e7b5cf4f728bace39d5762360aea50106380a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USLZJ1821180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc99181eb4206cd3fceb331bccd382544627fcc6672e58ed6f41e212706d590d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:37:16Z), 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/USLZJ1821191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c32ba30d841f5f07b6f79e4f7e346af0809797aebe233c2394a249cfc831309. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/USLZJ1927295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44bde98fc7235aff9888a7e3ec63d6fce5cc9144539fecacf25a289e779fad7e. 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/QZ5FN1888759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532ec147c80282478a726ec6259989b360f995837130cc888d030408bc56f077. 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/QZ5FN1890162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab15fb03ed06249c7f5a43acd77f61982d90d38eeaecce001f819453135707f5. 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/QZ5FN1890164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cbaf1cd99471274cef2378326dc87442e2b8d2d2c84dcf978eb70c5df350174. 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/QZ5FN1890167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6e7b8ef57c6645ca16e5422b56bd9e4ffae4bb91a7188ab62044a56e0f8596. 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/QZ5FN1890168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fbd52a94ac2fe6df657fc610e9a30c8e6daf15ed0c1224ddc478abefb15e90. 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/QZ5FN1890169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81901e7aaeb6faae8f9cbefc550fc6f9619d9a6066a45c7d21d8c342bf7a0ea1. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZ5FN1890170.
В книге всё было по-другому (Ib17 Round 4)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375cb2d9cc2b026af1ca09bdb748a47019faf2bc184b93fd376bdd424bf64b55. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:22:37Z), 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/RUA582106204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef230d3ea3d5bc038ad697005179ef3c1b694d6e7bdd8d082fdb937af44412fe. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T14:03:25Z), 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/RUACR2300285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f2140db18374f7fe808924f30c894cca3939c1101b8ce8237c570e903d0223. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/RUACR2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1283ea059a8274fa8322456d6e9d35fbaa2a5a6725bba23efcaa0bf270b4bf9. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/RUACR2402662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd4efe27bdf3eee68c5ab02e6cced0fa37b5b1546edec9dce145691b295b538. 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/FRX452396870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272e1c66906faee3b80e9d0fb55a54609096ac348f5a33e4d6cb68e9ce1ec00d. 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/FRX452328294.