thumb|Wood ash Ash is the solid remnants of fires. Specifically, ash refers to all non-aqueous, non-gaseous residues that remain after something burns. In analytical chemistry, to analyse the mineral
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 0x977bbd8cbff8ed61627d770f13d43874106833984c911ec526cfefa8b8682182. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4c90309b-3069-484e-acce-a033e2e9e82a.json and https://artists.proofprofile.net/proofs/artist/4c90309b-3069-484e-acce-a033e2e9e82a.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 0x663b7db7b6b102077c4c08f2e82a25709097d9cf3f35f4df71263e83fd49a7fa. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/GXF9Q2568860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014b52bb69b9190b1b449281cb639601acee5cd56083537fd4fa1fff49bd7a21. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/UKXN22549798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d2d759242e2dff657db9d14c8d90a450001fa4f928fca3bd186cb644cd0a85. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/UKXN22549796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3b80a7846a3c281fe53fcb25532fef2e4e51ac797d4941eecfff5381484389. 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/UKXN22549795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505fd679df39e5b7a6f59747177d453586305ff6b944c0f69dd325168092a135. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:00:31Z), 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/GBLFP2522620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f6de64c17dedd6ed83d9f0bcde0949bce74fce4c90de107e97ba91ebd75707. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GBMA22519567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f8e2bf9141ff5d1c92728638f4a419a8f51c92a9201ef754c6c70d1d5a3efc. 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/GXHAF2563267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d72add3fc6690d7ad617e7155519f64166c1b3a9f7ed9a059143779a38d364. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:20:30Z), 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/GXHND2508278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539f08303a3700412c64d81e9885dde526e750fb34e6ee490fa9f36bf7afd2d5. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:19:06Z), 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/GXHND2559322.