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 0x2bca6a7dc625f9179ab975cb709d74448d660a97cb1bec32831c99e8cec49e92. 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/ea6133b9-8c33-4fff-86d8-917c30e25217.json and https://artists.proofprofile.net/proofs/artist/ea6133b9-8c33-4fff-86d8-917c30e25217.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 0xabe0c167fb9a73f87018af7a9f07a0785a06005e2db4ca6bdd9cf5a4ac913683. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USANG2442910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4dcbfec27075c7fea370e2784e3a4d01088a45603b3ecc5c4ca865641950d1. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QMANG2250337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4ad8698a9683888e9a0d1c96d08f7110f4e65375606dffd2dd588113ac4192. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/UKZGC2307385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ff80ed97d9f6787fc19a934f0f4f7546b02f95ede9b4782be13f1667b1a104. 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/GBKQU2129285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2fcc089cacb7a061d87038ee4647a9421871578fd57ccbdfcb73355a8caf0b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/UKZGC2407342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73985a278d5b156ea31b6fcd19e9d81362ee0f5a93df62a7b85b1c4dcb5108f9. 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/QZMHM2046321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe009d4a5a370f9c8b8fb887f9014863a893e584e97cfbce9364f122b1c09a15c. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/GBKQU2129284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe6359b8dc29c857ff90350530206448c9143fb1fd9d8890f6cc87962448ff1. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/UKZGC2300981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefbc0bf2003193bf050e76719f175a35a59c415f1086b2a796bbb3613b0541b7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USANG2210128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12cf0b88e93bce84d6dc07e8b0286f3bbb3e575bfc9028ef978df9fb59b0628. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZN882293643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695257ed166558fed8e4ffac0f6b2e395fc87a93a0e99fdd807bab04541e51e1. 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/USANG2433546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc81aac9a576bf4d477500c64a957a355169fe25afa327e9df4d3848e15aa625. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/UKZGC2303051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89a146c170fefd530be1a783b8413551a5838cac88c4c750758efec61acba52. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBLV62127936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c367bf4a6c637cfebc81745bfea1a01b3c39ec8aaa159c52c0768e812d20d0. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/UKZGC2303853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7dab07424f4a288d917ee98a7dcd7a85b5a098821d1dae6dbfa80c3c67b90a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKZGC2407490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8020bf1072680e2f75798d59b6b7bf9754522291eaa65506f7ed6d8056ef0010. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKZGC2402751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67bcfab46c33578063f2775146d434add9f5d7ff2383ea9408c550c1268e233. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKZGC2407939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6208252cd8706bc5fdcf35082bac97c10c0812de5be45216b0692aa09fecec1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/UKZGC2407943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce78019335930d7f83a6a69b382dfc97868d2a265f1a9088ac06a47e82a99bc. 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/UKZGC2308444.