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 0x622ef43cde4bc81c05407458b12a6e2627b23aeb5f7d04fd5ca8a865e8ddc304. 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/35e52adf-7fc5-4a11-a729-a25f258cf1b9.json and https://artists.proofprofile.net/proofs/artist/35e52adf-7fc5-4a11-a729-a25f258cf1b9.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 0x4fe07e8e01c5878ed8527822802ac0349368a8b80b68794408582be518a8b1fb. 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/QZMHK2304619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63bba9fb361d7be93ef88e6adae356756daa95158c4efe90554636d0e154ed2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCABZ1455629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402c8d80716194395479d9460814b19b667c43f83778f6edb46bec19a12b9075. 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/TCABZ1455644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe326ce278162e951238d1f7d38a6b3a9f44c5699c7af8ef5241d4355e0f974f1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCABZ1455651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54a987e2e8b2c5f45a830f8bebe519ede4570fb86dc5158edbc1750afd403c0. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/TCABZ1455630.
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 0x17aaad735ed340066baad2a69c721d0a6464e9ba3664ae4208172c5bf5faabf9. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/TCABZ1455633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c8aec21390b5570b369297b4fb2859eb64614f1a9a92373dee2aa1ab5e63dd. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/TCABZ1455638.
Cover Letters from Elise (The Beginning)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10302d9d5bcc88691057ae4ac273ea6523bfacdd37adaec59b11f4386cacd2a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCABA1188649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298781afabe8a8f860d4c6bf16210abc338844c2ee1cb1920159bea7f1637488. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCABA1188654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8bf9fd93f2ec02260e20850a5f51219615eb0ca9a92e523f943ed66e26f48a. 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/TCABA1188659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d881bbbc61d80b46b2b4d629908819d73cb7af9f8f7b305a75ad90e73e2b858. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/TCABA1188647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56baa31caca58aca6004144c919e2b5ed6dd6862687d809912f9ddb7e20e0573. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/TCABA1188651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c81d282a358e4a334609edcffb144a47356f29bb3e68ddd4c44536708d9bc7c. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/TCABA1188652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe38f2f2ef6677d3992e63de03f02c1a7469f14cc211c58ba750d82873e6dc16. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/TCABA1188653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4d993bc34752ad5d61370178f72a35031cb04011fd776a5918515f7527e546. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TCABA1188657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf779d0d6ff4e6dd2d25e66e46c7e531679bd482f32c370256f059867ffa6491c. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/TCABA1188662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ecc2ea4171f4eec16acae39a5d89410d25c2f0040990f13651c3a8d6d3518f0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USQY51034702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47671cb6b42da76579c12158eda8ccfc798e476ee35328a8174c3efc24dfd5c1. 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/USQY51034697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841695552252a85d5849153ca1b33a54b654bb19cb60afbcac9e2d891688cbfb. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USQY51034700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d2abe1974660c0db03137aebeecd360a96a07a942a554026bf102ce876bd68. 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/GX38U2411722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cdc08d0785ec36d078ab71558d2c2cf8560bf1fb23363a30502a5b3baf6c2c1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GX4R52380229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca9ea5ffd71d9dc1bf9f4b99e093728650b57e2d4288562db530b4e4503942d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GX38U2345402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f066d69058e51730ce30a8634d4652589f850038ebb1caea423af525fd340cc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZMHP2347022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8a345c5aa1e1abfef18cbc4269143328afa56dc08755c54dd22c3626bfcad9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZMHN2354749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64493b7cb735d7bbfd7f4354a74e7f74468d8fd7d2752c826e27de9318c24211. 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/QZMHP2390246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04984f6a7165c4a5b145edf58c1e1e131fa11c3e5f80bf09530b610976d63ab5. 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/GX8LD2376754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf502621a0e50078902e72b294e1ee65473d71e3c1fcb3b62ba03171f1be2cca. 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/GX8LD2374272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf869655448dd70050b97ddeab28ff2eda23b168161583851d6f5147d0142ff89. 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/QZMHN2379715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79f4265a3c49e84f4d2e9f3b6eed3914798df5c31c9879b777d3f6023be0e91. 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/GX8LE2286094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5bdf6cb524dd92a688533a661d9cad99cd99e3fe6eef4b02d8b090791674828. 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/QZS672281576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000bce95a96cb7079e14a4c53ab3d191ccb2ea21974a6b385a7b8235a543d513. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMDA72243232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7778403b7d119a6045e10eb6853de42961af56e87e0099139f5026e26cbdbfcf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZKDK2223662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6361185ac28fc3c06a79480c2523e0198acb8d2d47a544aad7b806aca7a8481. 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/QM6MZ2265621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52e83a599270939109b98d106b13746c7b05d0ef22a52915e5f6a90aa64cdb8. 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/TCAFF2010632.