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 0xb9bcd999857c9ed26675d7d19ded3d7f86fea96e8f29aa5c16cefe21616fbd37. 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/2c2e4438-0312-4557-9729-4ae46b75d018.json and https://artists.proofprofile.net/proofs/artist/2c2e4438-0312-4557-9729-4ae46b75d018.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 0xb9258c65cabbf177cdde93950d80a5f183e6facbba806b3eb85a246450dc1073. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:53:22Z), 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/QZHN62004997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd672c4e1c4d392597abc655169831d922437c7c4c4e87bc76bfd6b80e24d23b7. 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/QZFZ72439452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42927d20131de43f47646fd73c76e85c8dfc5f844447ea12d487c8f0d8d24fb. 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/QZK6P2041788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd489a715ac31430e4603fdefa4e04592214e8f841170215d26105a45deb29b0a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZFZ22111664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ffb9aa17b34cebea476a135c5b184efdddc9aaf248e60becbaa05992a6fbe81. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZFZ22111665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88c6b17b86d92825a00367f9bc87bc31e5d9ff8dafbe6bbb8f790e6adc713f7. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZFZ22111667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7052fbc1b0ec1bf645f7a7fcb5411194f6e6bb0a2bb867c3ecc4caa2a3f12b4d. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:08:49Z), 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/QZFZ22111669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35323f836ebea7e4934ee90808f1d3e84701bff800e13cbc68fc292c3b54579f. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZFZ22111672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a77d3561655b68f75ae150338407afe5773a97737892eee918ff85884828c4f. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:06:04Z), 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/QZTPX2422243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192011aa046c93df096ed2eb7bbf6862867ebc8478219d115e6a423d86918e08. 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/BKGP92400305.