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 0x1d08b4ae72599cdd2fdce475dbfd7a03c46915b4e540ae190901ba04ed2a9e30. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/190c2912-82fb-4be8-b57c-f9b1052192cc.json and https://artists.proofprofile.net/proofs/artist/190c2912-82fb-4be8-b57c-f9b1052192cc.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 0x84578b5cc6308d3964df6990527239d591ba105ee776fc666d7c707f5d2849f0. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/SE5BU1843200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a53dc87cbbe6f6846a6df5065224f43f7bc3426b6d2a3ff82e56c43f0d7a2bb. 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/USHM21817580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0466abee34b85109c9fd8825a53ebd41d7401e15d391b571d574065ef1f8410a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USCGH2097896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7450d8f7c3e44fe20c85878899e3f0699bf7337ee560fb2684173fbc8d46e4fa. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USCGJ2260698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf487998649b153188bb611990385fedca933246947a375166eb8ffbe31c0ccf. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:21:49Z), 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/IL6652204240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac437a186d4da198b80323c1aa82746f99f2a8a713ba20055a9ef04edaa8b265. 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/IL6652204238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d79b0f5605daeb4f0aaf1e099806be9e41ab05c2b0b729f7f48973797005ad. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USHM92263154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2f28b8d86a874fd116bfca9a839ddf72cc62fbd10be930f618e76e0109d504. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/USHM92264958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dfef205944285cd3dcca2b24bd1a0263a0e2cf1d901398423d18434ba6cf701. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:59:46Z), 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/IL6652307740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c2767e8152e28b103f5d8f52fe848bd6e1123243e7e2143431b189ded906df. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USHM22459114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76b004db064715f6d2f50642898eeefa7fe4975ab615f6c337c676bcacd211f. 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/USHM82452301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbfbcc0a2fa2c56b206741958fb15d3c72ec859ce1be08eabfc677a0f4edf9a. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USHM82490014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f2058ef9319728ecec8ce06852f97f19640c116ef69d0827974c671f75aaa3. 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/IL6652410213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6820b0174859ab08315183703cceb92615cbaa1b8d1b77c4b1e118dda80a501. 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/IL6652512839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c33e81384b98b3e5101a391d1fbe47b87e95bebfc781dff0ce0f44e2058d1c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/IL6652512840.