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 0x2fd8c3bb53c6960609c68e5e0c9dec4a6621d4556d464fb9932c536bf1916c01. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e20f5ba-f333-4926-ad03-65f30b7d25ba.json and https://artists.proofprofile.net/proofs/artist/1e20f5ba-f333-4926-ad03-65f30b7d25ba.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 0x2548cab471c7da447f4e30c60f59b9c18a8f746eb1e801baf302c02f13ae31ed. 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/GX38U2206923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b825702fe2ff0b93fe864a2ee08a815c297f013da768c3e1c247d03a4dcc15. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:44:20Z), 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/GX8LD2280486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8156707278190e263e53d7d5a32680d697a2e386859e10a21a6032c9f94888. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/GX8LD2398153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc0ca8db2c58fd76797e95173f0e08a6608aa38ee17270fd39067fedf916268. 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/GX8LE2395883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f16d8d0ed11df1711f0e75975814e9f5b3ccd014f8456f0818234bc7efe23a. 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/GX8LD2482421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92812e3afaf6f6779a710d6ba865503c9663b8726ed5c8dc392755f782403577. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GX8LE2427246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5ee7aea6b336f4a5423ce078d5f87124d17f98df370691f750ee7ddd123e04. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/GX3HH2478317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0acbf3fac5ebece47a9d9e3560ae5d84fcfb353e97fb0309ed761a9b942370. 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/GX4R52402322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127ca5ced4b64892b7fc4bce63f60a948a1cff78d95fa13d584fafdc97c73adf. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/GXBDT2408465.