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 0x3ac9eaa0d6aafef3e343ef5bb70b1c3d0f21f24213d1f4c39dff64e3053b9111. 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/525adfd7-677d-4093-b942-e4fcd821d598.json and https://artists.proofprofile.net/proofs/artist/525adfd7-677d-4093-b942-e4fcd821d598.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 0x25ac16371cc1ac8bc3f3ea322c7706e66d44cbb098f6177b6a9df722a5fc5ccd. 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/QZRP52265883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636bd318901e3e286ffe3ce82dcde541ce9425c116d189e9cf301689349259e4. 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/QZDA82355302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ae1e7992db88aae9be6848ae28a40479fa5da7f724a1f20921656d8b80745e. 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/QZHN82343555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0007ac0a9cf3e82a31d8d494a3c54f4d0d9c5dd1e4a6dc2621bd0887713d46. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZHN82343556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf189d7a9c13badb61dccfa885a5b8e8b5dd3516ba43264b019157f2f9667bcf5. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZHN82343557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1bb7d07ad3f51b73892c912658409960a49077c89ce321431531bfbd02290b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USLD91755188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfe31bff8761c839b47dfbd42eca707b9fddc85e5f5a5c217d71b791443efad. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/USLD91758101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9eeca684d91c59d0b9176f629a46fe716001d9dc37803ce7274bc9c97a8a4fe. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USLD91758887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13abe227736b525d1073090237f2bb88bc68ca508fa69991c61d80f4324efd28. 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/USLD91756867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c479b13054f6376b134405d2306819c6c73b5fbdbd0d92d164c105ef5f7ef71. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/QZNWX2439719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95619ccfdfa4f6aa8bc0e84a644d7b23b711d80dd3931e0de57f4d90897c0f1a. 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/QZPLR2455998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a33ed3797713ae4116943c88270056255e9266f8c76ebb29a5b78b3e4b87d29. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTBC2481368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5645ff621bc9f33eb63f3ab9789baa882147eb2d4f0e58e4220d85d7aee483c. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZWFH2491156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84f4a924df7839a29ed01dc2b5b9d9424bf7ffb51f5707521d28a7127fc0037. 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/QZWFT2439789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2539c9a10eb057118595cad608769a34d726a2e7d1778973f81f2992ad61c4d6. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZZ772450089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88ff26fa5aa70d581bb8ac5ae74bde2701aa45804241af7182e78f43a50ad0e. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZZ7U2404809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f58542777d2a6efedd80d76f6bc0a71607885bf21979834329241ffb0457799. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QT3F42401722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dae21ab0b1d6d6eaa06cabfcf141e082a44c6f25eae8ed3cd59bf9cf347f8cd. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/QZFYY2593443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd4c0883fd4be40ed1d56e1c4acd66bd116308bf330ea20d1d56f5937f79f6e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZFZ22529310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8fe3815d0da84c430052266bad47340d230221c54a6343bc8a056a73fd27e82. 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/QZFZ42567135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7340547ba7897add5b5039f29a516ffec23cd7dec6e12ee552eb72db051a8790. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZDA42573974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647f9a970c5ee3d7cbb643c50240e1f7bb7a59c417285dea39579e7fbe77393b. 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/QZDA82597593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49d2e344c5d7aeca0e0a83cd58dce0f5f46db5e8315747e6240fd3abb34e4fc. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QT4K52541032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652ebaa033645363efbac13d0336f499417a8f617d4d3d0e57d507251bdb42ec. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QT3F42540692.