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 0xaf5d43804d334f35dd61258d32eafda7a910ece07207c8e06035c03dcf4c24e6. 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/c7144c54-4939-4d61-ae47-74e1c90d32cb.json and https://artists.proofprofile.net/proofs/artist/c7144c54-4939-4d61-ae47-74e1c90d32cb.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 0x288b84d50def8d1c45e7180c35435e3a6074607f580ddf7fcee813f7a2c33d69. 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/ARC082100076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa20fd0f1e95a429b682a6ef5458d07c4205a54f594deb98958a62a675fa5b5d. 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/AR6ZG1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8856dd8ae10aaa305561b05aed79ae2fb353d7148d1e35841ff4813b5f9ab9e4. 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/ARC081800080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f603e0bc6f33ccb959c4c9d84af13908f364081200ec687cc6436666e8ad911. 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/ARC082100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3115e4626643859d5122840f6df3c3f121b8dfc078ce1c7ce4fc9d71c3ccf9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/AR6ZG1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36718b28c899c62dd94a825d6fb28931fc2f4bbbbf3a658c1d2bde4c3d5c2b6a. 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/ARC082100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc183d52754dd53d0b28842756c69418ab9ef91daec98c756097fcdaeeaf8599e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ARC081800079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327373af51d959b17ec27e89b586ca567563301bf36a2e1f990a64a992518e08. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/ARAE52300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9990bb3a2b013d301bffe7437ee77085b28c478bb6f3bb5527d9b097fa2a4ed8. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ARAE52400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69a4dbd51a98ca06850d503aa60d86ac38b0d4f95d868f5c20b179ba7f12949. 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/ARAE52400161.