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 0x9edde2b3fae048ebd29677bb24a4ed86e411a8c042b9c20384df90644803ed0c. 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/23dadfc8-bf9e-4eb7-a404-9ff47fa85d03.json and https://artists.proofprofile.net/proofs/artist/23dadfc8-bf9e-4eb7-a404-9ff47fa85d03.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 0x447fa6bb67fb32befe4575774e55995aec78059a6cbe412ad7926712b6a665da. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QM24S2005211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22528fea6188a1732f9974a75a90d35b90bcca1a703fbebbcfb0d3864bbc3c93. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/US23A1512511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f4fb70c2b4535ca4890a8d140c8e4c46c8d69d36b34d612610c3e36e304c16. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/US23A1512513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7736c18800c7c3c327cfb2c3422c9c2088b945637db68c41e701823ca0e59dfb. 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/GBKPL2174686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9b1ac05989526108333bf8ddfa6d6b89635b417d9b646414f1d98832599d16. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GBKPL2209094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5589493404d9c96fed9938d5a5ddda661b964b3645585c5a09ce782fff1888. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/GBKPL2213753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42dcd79e61bb7466644bd0675402aa391db0079ace2ea49e222969eebfda372d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBKPL2213754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0b2e50e572c0ab7b4a4dd369aeb47e3e03d35377e5699712b3f779a3a8a379. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBDNH2100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c844521f0435db83776515795315ebce0b25902e7b9aede2bbcb77c7eb16e2. 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/QZN882214328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c844521f0435db83776515795315ebce0b25902e7b9aede2bbcb77c7eb16e2. 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/QZN882214328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabda9bf7a92fe9b9d1331edfecfd1d83d90153bf07ecbea165b7d3a6289eee95. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM24S1915046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2aeaf56a414f3fb220f80b6ae19f12d3b04017b681411f7c601490ed570f35c. 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/QZHZ32109584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da960a92a44f7039aa56d5111f2c4476c6d4bb1654df34fd2fa4c82341699bc. 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/QM24S2008302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc21f753789e77e38b5e80012ce49abc2336d643685ce8482a9735f59e3a7033. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CA5KR2388214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa764d020ff12af3c914b9a6da5ffee7a8fda124023e5840c72834e39d4a9b4b3. 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/QM24S2306418.