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 0x31c50f0dbef8520b44127dd0ea105676c6f6ce8ae862d6d7f91b5347342f5f8d. 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/0a5ba464-c323-4870-883c-b3ee70acb300.json and https://artists.proofprofile.net/proofs/artist/0a5ba464-c323-4870-883c-b3ee70acb300.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 0x669ba7932b83f64a21f9361172b986602b898a4f25f73dbbb3bcf9f58f738372. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/GBFFA2300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a45113ed5592d7b96b850fe511013329f6e8a1645076659b7c845065d8a5807. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBCRL1100308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa773ada8c61883bc205d5610f716a3fcd8b134ed39b16edec1b8bba16c9b67a5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBCRL1100310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d63a397dab8682c7f3dedcb81b63b3c0c34a392010a691b059964d9b096e0d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBBUG0201202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99222c32a3747120fc126c0b27dba38780312b3ddad2910110929064b5f3cb1f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GB5KW2200293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c569427aa19f0423d60883fa1fe2311a3aaf4200750e833f53fd811ec5d225b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GB5KW2200294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586a7ae0869007270d098aaae0f7c77ebd1e92bb71492ea86a4bc34c8e7f210b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB5KW2200295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455dd87dfd1976fb999089120a737862f46a883e5002c2dffc02d60369c758e8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GB5KW2200296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098782616cf02f6035860fbfc36088d8184a848091b661e76ac92a46d04fa635. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB5KW2200297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15812da3daf5ccf2d35b0ecf01fa982839990fa3b35c928482078ffbd9de270d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB5KW2200303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74528175e535bccd6a4806b990c0cd621606301f39e4623771485e6b622b704. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB5KW2202539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc105ee81b067cef76d27e94eb16434377af6cf9fa9ecb444c081195fb541b80. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBBUG0101001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f63df128cb6e44ce2caf7f10eb16996bf50469b9f64f7c3f4bb3c36e5009b94. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBBUG0101002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0024f747dd29457ece6b522c054f2c921564fa557d697dd2d29b7766a016f4d7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBBUG0101003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb296561efd2c6706d64a25abc4938cb6d1d07591c7ddaf54d7173d6de99dc1df. 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/GBBUG0101005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c2b290b1fae74473eb1aff936b74bbac4f5dd2b90b02d865c1c10282f33c67. 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/GBBUG0101009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7945dbcfa1fee0116ffc17d2b3bc9b30c0a777fdd7c51a91218b3a253d3677. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBBUG0110010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c249acdfe6af09474a6276bce8366b6d136171e94f9e861287df3baab0a7782. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBAHS0401205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9a48d4234934b2e13a56a751b7fe4a2af18d6036af96325b19eeac601d3b7c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBAHS0401204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd936fe85550f86905582253553b5e8c775941e6a0b094d8904385126333197. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBAHS0401206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a27ef2046414ae541899ffc89a003dbad6c6155b89e7f172eddb2c97488834. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBAHS0401207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e34c9bb083ed72ffeb09aec3be15211b80ef68c1996373c6c751bf6d1adb8b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBAHS0401208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250fc9ee162f9d0498d186a5086d05c97d768d87d1bac2fd4c1b7a8e2965a7ac. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBAHS0401209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec907ae2b7b39a3d8daf460900cd3360123aacb2d490d3db62c42d738cbaab06. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBAHS0401210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf6ac66c2ea129253ff68a1df3afdc68cf22fe5faf7b77952333d0bb144af5b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBAHS0401211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05ad7478c62ba2230db1783c6e3a91d3132f0832a7eb2c0f74dcd9182081653. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBAHS0401213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca36454c60a98d76b9ae7184c66c35511426833097069ed9bc645c78d369b3d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBAHS0401214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793edbdef01ee5aa9fe4861b1d980fcbdefd3db6a56f9dc07df88b69eece3fcf. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/GBAHS0401215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56473232c7e40de721cf36323da993ed4790d4cfddf67108ecd7238351657783. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBAHS0401465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd616a385c178d22337012f38c3060ad00db027f86ca95a6f4563b6f2a368ab35. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBAHS0401469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bde4c7b6ddd6a2a8439f07d56a50c616884190d3654a43648295bc2a3951482. 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/GBAHS0401467.