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 0xb660d633b432fc8732865618cde5e9bf2b08b9ef977f42eb87ee062204cc9dff. 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/c8c5c4d9-c093-4def-b209-facdd5b5c52f.json and https://artists.proofprofile.net/proofs/artist/c8c5c4d9-c093-4def-b209-facdd5b5c52f.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 0xf9b5dafdd0233f34ae5245150c4dc80d75b7e55291fe1ba62837c8b57802d8b6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NO2DY2300085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea6b34c83b5dcbe05c6c67d2a0c40f41526378571ee78f5b50f9482dfad5258. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NOAJR2000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883ce1991365170697479c1ecc9a55087981385b5c4daeee5a8a318e30c1e10a. 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/NO2DY2300234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15eb976968c27223c526cacd9659d4645a00ecc48ddfd1ed3e12ef127eed7554. 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/NO2DY2100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf115bfe8f1e3da04ac486d69ec26c8108f111962cc86f55bcded80eb162b9d00. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6K2000349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811fc02d8a82da851ab89c642d02375d5f83af9df1f3d82c716bd8314108cb58. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEWAW2300201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a1e7dad84d9330b39f1a8d9e99a77844853db429b8a6074ea5a3e9b9387455. 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/SEWAW2300202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd34e3cb054c66b01bb4f30e649cc1e637911b4768ea71aca0f8b36aeb98a7c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NOZ5A2104010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ef51b9d0bb5bffbce2d863db5e130615c946afc9493be5d8b4f9511d89f562. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NOQWV2201100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ef51b9d0bb5bffbce2d863db5e130615c946afc9493be5d8b4f9511d89f562. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NOQWV2201100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c3ae0845dfb1ee12ab87852275990e288cebd77a9103e397704e964c672ade. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NO2DY2200309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255926a951eac6e436dd639fa974c24b5df92fa178eff7733921c3af7c287c73. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAEJ1984877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd58d4ac2932f49a2bb7284fbe171277283f97b582bbd1efe655ca74d8d6859. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAEE1913246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96260394ae0aa57a0f91d34ae75f9c8cfe22a00b1516d48929a2b8d9288a612d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NO2DY2300134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1813ce1c5bf300515e17ec0a8ea90df12896c93c1f3bdbcad4fec9b50e342b9a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NO2DY2200377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08abefc5d54be06b016ee9cdbca4cee13541dcdb36373fd7cea7388a45ed619e. 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/TCAEB1947033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf10f4ded8c867cc59b86b6175b439bdd4df7249c2314c960c862e37062a2cf5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHNA2046427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe181867907c80418e65c1a78b894aac79b3a3083e6ee8b8c946a8c82e416d39f. 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/NOZ5A2106010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf115bfe8f1e3da04ac486d69ec26c8108f111962cc86f55bcded80eb162b9d00. 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/QZK6K2000349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea1ca776d0d0cbc3189cb1b02e3e852b3e773063c6c9e9e2daf07e87a06adc8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NO2DY2300324.