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 0xde69c9fac61438086e588e987b76c82bdae7b917dcfb9ade72f0e5becd76f5c5. 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/8465355c-b30e-4f8d-8adb-1cb0aa772134.json and https://artists.proofprofile.net/proofs/artist/8465355c-b30e-4f8d-8adb-1cb0aa772134.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Süper Rumeli Pop - Folk (Sarayevo - Varna)
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 0x2ae5d7c6677d99033fcc1f902a7e2bac4555fee04c15741b9d6f84ad4f4066c6. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TR0420600928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54471c7d875c932f58d1e8f161fac02375ea7a28c555dba059234e4267ab60f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TR0420600913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18aa971fe1f74851fcead26b9e4ae7075a70fd286a0063ded53f2f08a2e90b8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TR0420600915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfe7b304a59cd2320ab5fca53d7577905f82eea437550baf7619e5a9c399f2d. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/TR0420600916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ccc79f5bb7275b0134c8db2f91035774211d3c0e4ce9b80d48c0980c8f3cea. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TR0420901025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d516b61681d0d020915bc097c20823f5768f145da5e971e2137503f0eadb44. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:06:44Z), 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/TR0420901024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4aa2e323d2881e701a091f86c362538fe7ba42e6bef0ba99e034b803e50ca41. 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/TR0420600922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6394ac61ed033fa40fff95086e371445b0cf64cb5dcdda7cd7a0accdd867e7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TR0420600926.