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 0x3c400c5abd66fd47b439d4eec2407bfbb54b9e9192c6cc5638b5a874f0995bf4. 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/f507d3d6-14bf-41cc-94c3-dee2dca2ca4d.json and https://artists.proofprofile.net/proofs/artist/f507d3d6-14bf-41cc-94c3-dee2dca2ca4d.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 0x4c2fb8483cea6b5ca38a5f5aed6e15ad0e08aa56bbebe99ace6bdda210d947e1. 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/NLS161700656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9158d7f44e98969d25723ccd7470c5839664f6ba21fa6f00011ff6ee33ea23b6. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:41:21Z), 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/NLS161700658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb241145bb4772006eef83dd8ebd2c85fd441f4ba4a074340e59197abca335c. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/NLH2L2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2725c5af75939340610af74351e0c18ac5ea2f538c4dc9840ce8a9d9b5cb61. 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/NLH2L2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86cc2fe22b12dd788373f2fdbf44c8272f5cde7cae24bc22ba8212d912cb461. 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/NLFL72100317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb270ac2e26c5ff86e7892ec9fec54e2492aa03d58a38b13a5e3dcb3d2c1ed16e. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T13:52:32Z), 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/NLFL72100523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4ce79273b5fe20a5af9aff31b7b6823d54d0d1cb4b7f1d48e423137dcb31b3. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/NLFL72100848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519d8caa55cc0eda020bb075dea403deec72d06a941b20beabeac9fcdbc9837d. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/NLFL72300275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0ae5bc6aed41ee31c91636498d98b8321ef99e71a0588e8f7b1a41316f6371. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NLFL72300277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f59312eaaa61f22bf8cbc6f22b76a1faffe7a21b9a32a5a64270a1dcaff227e. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/NLFL72300718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c06bfed180fadde3fa88532b54cd7a3cbfe299d7762746800e9ca6502148cdf. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:05:40Z), 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/NLFL72500786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172ebe2b3d4d3c5f029cbbc3771b911d4b2b69d666faeefbf40d9460586be03b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLG421900075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172ebe2b3d4d3c5f029cbbc3771b911d4b2b69d666faeefbf40d9460586be03b. 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/NLG421900075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b82ad1399381da38710e81a6335c3845e4bdc5cd2ffe0a517c1fcd8633e8c5. 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/NLFL72000502.