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 0x9e24ab1095ce422b8b2822d19b83f9c5c95f273ed97b1c33e318775ad176a0a8. 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/02fef94c-49ed-4540-a768-f90ec122374d.json and https://artists.proofprofile.net/proofs/artist/02fef94c-49ed-4540-a768-f90ec122374d.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 0xde37625c5049f75bec66ae054a346ef4a02e7f3f0ef66901d2aeca399144b366. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZFZ32180066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8502b2f1d644edcf1b27b2865fe2ff42ed90568378451d28cfff35e23f3efb36. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZDA62138688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4796e54e5e804e1592063ba8e53571e9b3d21d2123807c6bbef973bf64fb933f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZPLR2113564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c07cb4313f62ab93daa50b367b8b63a2ebc9c815a46fec811d2ef89d8294d00. 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/QZMEM2255227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de85d580229413b7cc84538f927d31b26322c8fd76d01efd26dd96f232f7e7b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTB82205887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738ce076611dfe80b186f2459bb8f7530f67717211eae01934fc4ad03b9b8be1. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZTB82205891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3348cba8445e965e2e7806472416cace0ccb91de63b3d6b68fac565efda83b8. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZTB82205892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b80635cddb2f3567843970e73c4c3f253813f6fddd6d94d3c6ae2812d86f34f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZDA82435562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b19bec8c1493133b938227e9868cc86095f20775998451d0b3056b8dbc7302. 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/QZMEM2308373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d308f8a9aa94412d06a79c96c3faaff2b917f639adc32d5b3a95efa46dd250. 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/QZWFH2303789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49106072ec7ed0ccdf5b928d71ebc2e1a8bfe1ca1f6763767fd9ac98b93b44fc. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZDA82435563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670f5ed23998c65576b964c424b8d5530192ca3864746493a3dae94398ec49d0. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZDA82435564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e91d752c011217ffeae465dd521ae42b576067cb3a6c0f0de24d3968aee856. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZDA82435567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb892219e6210c145fba1b06191fe0cba4960cfbd37cbe79d147a18a699dc1dce. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZDA62426901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeebff3c5ee8b8d4c4cc0ba6ed39d186bcfaa0e1130904108d9213dbb6c87408. 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/QZWFG2459935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12ab10f8712b020a8f364733493c8b31e8417c4b4fbd9627033a49508fa6b00. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZTAY2440512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea7ba25c70b82c7a26f54eb75747956e26385c3ac482b1d141d9c42e5d7d616. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZNWQ2483399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8d1466d5b0961867e2a1f5c14cf02c01fd6aedd067a9fae396e243e8621278. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZWFS2426903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b22ea0666aa4e2567d11ba55be48752a326f098e0624bdab9f92d514462b5b. 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/QZWFT2417700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9ecaeb4757b8da63fb46ae487997978a19245b68ad76a7061bea9a27e57e83. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QZZ7X2499594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b22ea0666aa4e2567d11ba55be48752a326f098e0624bdab9f92d514462b5b. 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/QZWFT2417700.