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 0x0997b2685be14104ad932d0a727dac5ee9ef30b050fd687507de57daa2e25ed0. 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/884ecfc7-226d-49cc-a78d-a3a077df6dd1.json and https://artists.proofprofile.net/proofs/artist/884ecfc7-226d-49cc-a78d-a3a077df6dd1.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 0xad2620edacfb91e50d93284ade695bcd64db828ecbf179ad598f09fc035d82aa. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZES72331835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb255bc274bcc8c0eafddb11fb483a1ee42e4fc255d89945bc6365302f952e796. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZFZ42401877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762d51df6c458fee6b11355bba1d8703293cb77190e07acd9c824ebad7da0dba. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTBE2301425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51803c9aed3e3c4c0a05f53b5c0d3e27daf69f12439114e47719f94abb159579. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:04:55Z), 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/QZHN62409031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041eb07da63a20ac4ef2493a810205355e5df1bef3eef891f1f37e2c78237371. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:47:38Z), 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/QZHN62409032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2620edacfb91e50d93284ade695bcd64db828ecbf179ad598f09fc035d82aa. 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/QZES72331835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb255bc274bcc8c0eafddb11fb483a1ee42e4fc255d89945bc6365302f952e796. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T03:00:44Z), 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/QZFZ42401877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e1045ea26ac0e5e50c4f2d33b84857ff5b899abb4bd416d923c78199ec7ffb. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHN62409036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a7fb550bce46e17fcde3f8f58968c6f5fcedcdc8527d3b3c68d25ae045d567. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZK6F2524241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a72ce8737c5f1201ecd611f0d6b92d4b15570730b1017ac518049714fba5f27. 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/QZNWZ2555389.