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 0xe96f274ea774a287a31f2549ac20776570a8d4e302294aa59a22d37a40f453a3. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2e4df86a-b594-4ace-b596-54fbd0275dd7.json and https://artists.proofprofile.net/proofs/artist/2e4df86a-b594-4ace-b596-54fbd0275dd7.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 0xf8db1d717b2d38ab7643fdb64a165f33ebcb0e0e13ae1eff68790e2dfb80ecce. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USHM21359726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545d460415150efd4618080374fd0739ba0cb005f6dc2adbd5e1d970e181bd33. 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/USHM21359729.
Stin Paro Kai Stin Nakso, H Trata Mas H Kourelou, Sala-Sala, Ta Rialia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254526598ecfd87472087af6fa9d5bb7c305923b0ffe4d2d7bd6ed07cb2f5773. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:37:36Z), 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/USHM81446425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec66c077e0ee68ddc48b5e72b6a5ce8bc892661d226a03f7fbc0cc9f072f172. 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/USHM81446426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d1fe32c543786de847cb3d4b135e585dce2489e6ef7a14d397a2a9166424dc. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USHM81446431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8740b39ec2890119866995b3cf30482e08ffc00b7bd4cabd6eee7b89135e25d4. 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/USCGJ1536626.