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 0x248ece32ee2beac692ad207800e8f633112bccbd3ec6ba3f957cbedcdf9b3925. 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/d7c7679c-65c6-41ba-b1ee-5d91987502c7.json and https://artists.proofprofile.net/proofs/artist/d7c7679c-65c6-41ba-b1ee-5d91987502c7.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 0x3cc8042a6c1a9feb311c59c443d32b66fa90614142e5efed751a4d1d6a8c8db8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US3DF2403863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bdb76ab0fc21eb581a7b4130931a70df047951fe5265defbdebcbe0ba9605b5. 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/UKZGC2303289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc8042a6c1a9feb311c59c443d32b66fa90614142e5efed751a4d1d6a8c8db8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US3DF2403863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20f052c4ae5a7eb69b86634a4ceef427786b02eabb33e70198f4399e8d0e785. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBLV62136425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c06a634f9cebe3ec25424076d6272343b4731e6b9b2ae098b40df98de3805a. 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/GBKQU2180649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd945b4a55924ccaf92739e5dcb1324e80ec38b1b8ca672db0d354a202b1e4c50. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM3DF2134446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e609ed6cb42746590de6d2111108cf8c005f63664b0a9ef8bf5ced75de9f6c. 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/QM3DF2257679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeafc55534ec1d75d80f084902fbf1e68199cb041348a51b4bd24d6969cc19c3. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T08:48:12Z), 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/QM3DF2206486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ea0771a799f51d6603ae6f1ea9028e552e1cf10fe4d58ef0f31cd0ec9b4ab5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/US3DF2148868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd694f53d9aeebe655ca47551dca7cb9d1534ef2faa0784b80560944498b53170. 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/GBKQU2101969.