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 0x891ee647256812edee5ec8825fbbcee7d6fa75d353a7b9af90566d8b0201b9e2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f54cbda-6841-43b9-87e5-640148687d0d.json and https://artists.proofprofile.net/proofs/artist/8f54cbda-6841-43b9-87e5-640148687d0d.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 0xdf39c02edec4808e59d68b476dfe6545340a7347817eb10c602be535f0922d5b. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:05:04Z), 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/TCAHH2305655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f82f4e5d9de9ac9e8d200129c3d151612304dff21677621cfb55bd15f5350a. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:12:52Z), 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/TCAHG2398278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1856dc810a454a06e24fbf719712f9dca46c52543bd336197a97b4e663911750. 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/TCAHH2305752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a44f1feb9e13aa2ccc18b54889442e28796d50ce41c8007d19ef1782a5b3e7. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCAHG2398431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74404f87c785458a315755a4407ec124abcc281c96778eb1dec48ebb6c82999. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCAHI2318609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2e0bea6a39c72073b9ef3bfd1d129669a6852658ac7b10f3fd03f0487083c7. 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/TCAHJ2307717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e61caed0c333d6d375d689cace422cefa81d702593ca4d301dcd807b305a4c. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:05:15Z), 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/TCAHJ2303263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa479e581c2d9e47a23b892d2b4554eb7441637a3b485bc90a8ccf09eaea2cddd. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:46:38Z), 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/TCAHL2361619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28221741c4de97d823943ee47c8cddc766804b1d90e333cf84cf934fc12634d. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCAHP2307911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf660c82e756fa10fced6af07ebd5498841dda54d48741e558871c5961f90c44e. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/TCAHQ2386249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc151e0a06a9c3c0208e2d1f64632808cc833e847592ae186da834aef3810843. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAHX2462034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6bbd3169048d7e73d878ba550b4bc9b583f160ae50773d2a6739a6cc1202fe. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/TCAIB2403225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153116dbe46906a06534650a0e98bec17368b657542886fcce60c1778e08e812. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAIG2492128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4e2d78412e70130c4b3882a02bd980804473de79e9c8553cc1ee02e536b5fb. 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/TCAJB2449989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362c826082d4acf727f397dfb393038eed303ebccda6d6e0f4ce4aba7e937b5a. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/TCAJH2514105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec064c730ea5e42c98dd62e4e0612e0ad17befab96d434d1a18e537cf1862dd. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:41:04Z), 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/TCAJP2525505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddf10ea3e18ad7a250ece7300c7cb8e69aaf469cf9477b1541c558bd3a21d47. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCAJU2546503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb235118200798f0daa70cd89f5b777cdd02138ce11453029060c6b9f82c037. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GXHND2520903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7323b207a0d19b79fd4e9b09b5bc82c8b4db0f58c34265dca5fd74add7cf3128. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT6632533959.