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 0x76749429a79cace3c4ccd267e3c524a9f1f56633669d1b0783ea562583ce4c78. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4d7d346-ae0b-499c-a031-7813604a6761.json and https://artists.proofprofile.net/proofs/artist/a4d7d346-ae0b-499c-a031-7813604a6761.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 0x8679239a71d27c94daa81cf615f1973ac1674adc90dc6348dd63053a43ad1aed. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAJP2521602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094179a005d96dad0ab15a77c3b8a6702ac6b7f52a3e6003d26da7b681e7fe6f. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:01:38Z), 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/QT65X2518505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60b48b882b5f9e465db8d2828c37e251a51b42c70a2b49ff95b05a4890ff88e. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT65X2518560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85638b26a30b8ae7d06284510af3d5c5b996c0fcb5e7813301eecd580eb6ee0. 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/QT65X2518660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206e19bcf0d1d7c47ae63cead7586df0ef0e696c91ec9da21283d9372b050dc1. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:55:17Z), 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/QT65X2518683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc1208e03e13baa69462c2204434b3a0adb5d7b3678eca9e4a10a88a3eeba21. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QT65X2518701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b46c8dac76a76fd502ff035f7d1d65e2a97539ca406676c49b9c9c886d00889. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:02:31Z), 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/QT65X2518743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769832fc8dbc6841f661615ee9d737461b6af84e84dfa8ac7309165b5ec8b608. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QT65X2518765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3528690ea94b075f9a567764287e2c644b9ef7ee7a40fe7f744d9430e1cabcf. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QT65X2518786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d42f7cce7a144f642de682dd38c8c686fa5c12fd34b8115be9a2540211a124. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QT65X2518793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1d29552e7cf4bd37d0ff37d490924be7e90715718b0897c15c53cf993b784a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT65X2518834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff42be73af04d376b6ffc19894e0c70de7ce098f7abf77565a40d5aab5253f67. 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/QT65X2518873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a4f5ba9c74d7458484753517bdbf28bc5bb0779bb9b38ee68084216997ef65. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QT65X2518898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40869997963364b5e2b2939dc0edaed20e6c838a696f888ea4ec85a888b708d3. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QT65X2518917.