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 0x9792543111f5f07dea380bd2c579dc17afe91c6a02d78fa78512dc7f9827a119. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/65820046-9a85-4cdf-90b8-7ecbb37df30c.json and https://artists.proofprofile.net/proofs/artist/65820046-9a85-4cdf-90b8-7ecbb37df30c.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 0xf4f3008b63df89fe45b53388b7e230f842dfcc5bcb093591845ecfdd22923cb8. 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/QZHN92109951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224dcf318a4ff722f204e0dec8dd3168880bba21659a53e665e11686d9ff74ba. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZK6P2171279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6bfd0b1b4b3332a18de22360cd58a9f536328ef2ab5d2b5801afc7e49be63f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZRP52132817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0918045919bf9bda06ac186a6f82736fb0acd53dd2fd868e3f9c64da07c8ea. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZHN32260198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c3d7743f01521337fcee778a15b4674d35e3feeca55eb12c4192c3af035928. 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/QZES52311987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3688142e9dc88d94402a67d4ce22496380b7b3544b8bfd4d5ff85392a6068388. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZES62325542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c37b9190ae60ca8040c8daadcd8f0ce3f9653c3ff2d058e77dba9832b2ae8c. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:37:15Z), 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/QZK6F2256993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033fe2d5b714f250e8fff812349e09f75d66a8201b484003118be9f45aa04d03. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZNWY2280135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f3008b63df89fe45b53388b7e230f842dfcc5bcb093591845ecfdd22923cb8. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZHN92109951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8063a36c831e9674270a451792766608824cf4cac53623f299ed3797ec0c42. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZK6N2121337.