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 0xd954428648c8694c17dc9e67394efbb3ab25a8ae04a8d4a84d51d45b4d9f1526. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0459af91-7004-4ad9-affc-c2665f05a060.json and https://artists.proofprofile.net/proofs/artist/0459af91-7004-4ad9-affc-c2665f05a060.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 0x46effaf627c54241d8a9c36e198266266a1978dcee2c8a811c8a957e9feb7464. 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/USMH92347283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11605b39dbc5db8e9ec4d83ef13b71293a6db0b84cd58f21e4dd1d11a6a9e66. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USMH92347284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dad4fd921de001468766d73d5a59c155039c50a0694f0789c48047d5ed24721. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USMH92347285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbef6e816465d1f3f74ac4e8ee89cd5a5c17d17b41e79235d2f3524b4e03cc15. 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/USMH92347286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c0e282880b40aa5ac37578aa47e8c165bc5b61cf1847926b09b9e54cdaa536. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USMH92347290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7cd2f95001ca01b05da54b54dfc0286742e9ea51dd6cc5b312621121f05c36b. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:32:58Z), 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/USMH92347287.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f52468124b884642e5cc23db027ff60a091010e755c8dc90184e43e0d23366a. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USMH92347282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6681e59783335d895a27a48350978ce49c1381825c03c552bfdb44c2eabca547. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USMH92347288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4603fcb2f5e4720d36fb3ccd27fcf40d6336869fd68d63c4361806355f77757. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/USMH92347291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc898bff91d7214b3eaef9fb61d8d04e1ea2f46b3dca9e67708bb105735c570e3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:51:50Z), 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/USHM92104554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6585742fa9c34bafd22f1c113839888736822527e794051824fccaba83a5df. 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/USHM92104556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9262c48629c7503b3d5e1954623d5a10488fc4833f9bf5a7f0fd7754967cdb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USHM92104559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9130f257c50fcea4e97342d552c13e16849dcc5fed043b2ac0312bd01049bdfb. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/USHM92104552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d743b36aed1dfc78db4e722a92597c14109634b15ca26d745663e66f9225379. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USHM92104560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e93b874d0b9dae508f8eef24ad016266d6e47199599ed0ea2cfd1d5b2298d5. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/USHM92104561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4bca8a6b8efe6102429cc2e32e61470b849bbe65878c92ebe2d79753dba469. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USCGH2132433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6c053cb2e9e398b5399c8bf5876c244904aa9f8ab32b974d8bcf58cbc2ceb6. 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/ZASHI2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a471f7eab57a3a0b00a4245f58564696bef160fe46795d378a6f2c7551d8d06. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ZASHI2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e85206c694532c72f3ef475cf1c39d06f004ba397dad06c767b292f15392d31. 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/ZASHI2100004.