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 0xdaf9342d8a85c6586668f86497a2e79e42502f813d7cc5d863822b552ad8f92f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e39e1e49-a2f3-4263-9c62-7c172c54c55e.json and https://artists.proofprofile.net/proofs/artist/e39e1e49-a2f3-4263-9c62-7c172c54c55e.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 0x9e6fc71995a559f12effe126c7bcd0b67fa513baa7c9d24ad8fde074c2f3a515. 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/GBWUL2400418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efd7093f271d2e4fc15f87552d6f02087c486de4d201047fdff2c9e9e5acc75. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/GBWUL2400392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe455158a801632ede63be9a589ce8a1ba04ef0f8ac3f859b7cf8a58ffed238b7. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:27:41Z), 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/QZTRX2430105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc1957894c323f06fe978859de007ad87106f906ad5a4d35598db2ba49fde47. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZTRX2430155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692627c71b5382eafb0877c901a200291c384ccb7b2eb9667f1a4343ea30c502. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/GX5MY2444014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4619545b26a4fb368bb71bd81735d39d51c63558afd1dcd6701add6e0987fdb7. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:37:58Z), 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/GX5MY2462225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d2a04c84afa33bc356906a24abd2ca99e96bef1a0fc8e536dafbe89071824f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GX5MY2479616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b249c70314a668ad811c67fdd535868d1f8f06c6b0d974ae12bf6a79b7005fb. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GXBDT2485964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88d39bbcd414113be48963d4c5ac285c031a09883ec64f9fc7718eb46a6087c. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GXBDT2471911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11c23ac2749f5420238ef8e799096441449174e40973c60534813859b487567. 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/GX89G2403980.