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 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 0x98ac43d4241288f3e033d5281385fbf5736c92630ab07bc61f2bc297488fad85. 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/ac200345-2949-48fc-ae18-fa8e92f0efea.json and https://artists.proofprofile.net/proofs/artist/ac200345-2949-48fc-ae18-fa8e92f0efea.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 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 0xcc1fb30f614d058196d163d4f4ec23f3e75fd1c1d02ee72fd6356493dad86438. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/USA2Z1411327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ed2083a8bcd28a1927079c9a8db8cb8dacadde69e64e694eec86ab14c45e53. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/USA2Z1411328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543a00139890e536fa8962e536631a75e743172b8bcc54ce8223eff64849eb07. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USA2Z1411329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef485e2efb437c2e0e7b534e583686b3ae682b8364ce5b062fc0d01cba92cebf. 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/USA2Z1411330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ada964843295a67199141ec178c3f121df94d4b318156e1db9023d04b397a5e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QMDA62220018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a0dcc7e92b2aa59c60a82e90ca43976ef97cb290ce64cecc200fe335c51900. 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/QMDA62220019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89de603e187b6497acaac7a0045a8f1ffffa5a4595645cd6d05cc76a4fcc099b. 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/QMDA62220020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37a58a7c26a08ce47f538ba115f3859ba305b48891332933090ebedad686876. 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/QMDA62220021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c44b8b879025f47e601adc3f29d86bf34bf3986f62db0475aed8307bf6bc1f0. 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/QMDA62220022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865048f9e75ece71166456c23e883b7861e25ef34aaffc216a7823e48a03a678. 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/QMDA62220023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21050452eaf1c55cd57b5d47fba1de16c902c57b957cf9cb10398316983635f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QMDA62220024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84722fcb4d825d8edfa787ea19a63240534454235550cbfb7ed922ef669e2fb6. 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/QMDA62220025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc91c4050f87c1d3c7ce6304b51b240215be0a4c43f20419ee5575d9cb5cbadc. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QMDA62220026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204c250d91d563d4b2e3263b070e4be12ccddadc02dd163308c87047f8df794d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QMDA62220027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663cc687c90319071418889f5d44587ceb63a0318de48dcff6a4329a62bc4bfa. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QMDA62220028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0310e6e6dfed0dd64ce1a69e9fbaf5e7a5cd2f2a165a0b72d288275d4d71602e. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QMDA62220029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fe0c2814f5b40fca88593bc0790206f1d2bc19b8e8797f78a218dc132ed4dd. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QMDA62220030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287d50729382ba6c733cd93258cd55fff80abd6b0f2aaee3e394a94ed5c28725. 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/QMDA62220032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c2b33acc2affe577e3f519bf1920b67fcd9d98bc167fc5425a41cb663a0695. 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/QMDA62220033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504bf0d94d549895b309bd861f944ef70f93c48e8d1aec52122e6568866f2d13. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QMDA62220035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f2a45a646faacc2b40c174de0ee93e6e5f0c77bb1a8f7447ea5562108b955b. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/QMDA62220043.