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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9fcf29883ea20be126bea5283ba0a8135847fd7c1505e7a89316f417465241. 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/3b3c6e5c-7ba1-4f25-8d94-eb455f24ae5c.json and https://artists.proofprofile.net/proofs/artist/3b3c6e5c-7ba1-4f25-8d94-eb455f24ae5c.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d41110e0881d3f3b26cc1d975a3dcc5027b02b78ec3463c9058e7c50a36c017. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/GBSMU3552387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6826e6b9c383c0c150d491992fa6928fb3b81bd1c91e34b2e1dc7a5d8a4e92a4. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBSMU3552388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c118738f5346717bd8046c8eb3209dfeea30952a77f87d2ba2759429e7bf7e9. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/GBSMU3576863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e41840b34d2a6b71fb7fb81de118f0dbc90c4a72f07b77d3f3ac177faaadd2. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/GX38U2157893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c0436b8f69fafdcd3b73d4a559f5b6979998664a1de5c2ffc15f2cc1b22b9a. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZDA62092054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9484c8b821d088a29b9a7e4f03066a459ea0eb47b6366240ff6871e3df1c449f. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:08:38Z), 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/QZES72024215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f054d9b4437c1d169322bc7fed57b5f4f994e5cdfd9372d47063e9a78093eff. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:04:36Z), 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/QZK6H2051846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6215d936b7e18e240f585f57f80bd07f98416c24a0715935075b5dff52224537. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZNWS2043947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c874f63a985611d04090c01f46184918e693e404a7150251b1591a554d4f22. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:15:40Z), 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/QZFYZ2165439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1143c668c3ea238c210dd3bae0ce98837a688269b69d62ab220846501a8ae3a7. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZK6F2133849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19e776c4c9759d92710fe7ec571326d58adfe1dc60dda77cd209d28cccb982f. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T11:05:40Z), 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/QZTAT2107243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6f00abf546786e9c8fd99f6509bfff19cdfc3e409bdb01e857d3602df32704. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZTAT2107244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2b073c6d5d0e7b21dac38b3ac88bf07c0095ab9f25d43f49ba617a1d987814. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHN62271523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b2e604c17dfa5fac37680a1f69af6012263a5be436978af4cecba319a9af2d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTAT2277972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2f0f5c6b4d578b3c31ad9d97cfc7a7fd61b30f1360e06da067a905c7023f9d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTAT2277973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe97c7133fb9e61ad60c66fdd02b8f9f709c9e7367d0e2039b6c095bad22ccce. 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/QZTAT2277974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc4e980e2bf8be7bd843dcbeffcefaf8a9c73494ccbdf1fd68443deb8cdee53. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTAT2277976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e508e360cc3810bffded74eaa80cdc3393603c94f28da4eb8d036edaba455f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTAT2277977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a0f91289923c2a23f2f07232613ed46e532c3f47f9e8816cae424399dc212c. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:52:28Z), 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/QZK6N2364261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbada9a5c6143a0b46284a9d1470fa22f4965bbf3cddd95bd8f1c293f90a5655a. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:09:24Z), 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/QT3EX2481591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f659af62466d21466da282cf39c8fe946ff1dd494f9307a900d2e35759bff97. 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/QT3EX2481592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291578817526ce8cc2bfbd2cfc7a7a165b53f358d82f77a9d77f73d176bd8639. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QT3EX2481596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f01f326f4202a496be2e860aa5bf4bef6260fa715b37a2e9b81e149185c3ca. 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/QT3EX2481598.