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 0x5d3f89a77bb881bf00cb71d961ece76eaf1160b62a63a08dec05b73c1617a39b. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb99bf07-b078-41d2-9265-ef8d02325c12.json and https://artists.proofprofile.net/proofs/artist/eb99bf07-b078-41d2-9265-ef8d02325c12.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 0xf3135ef370add5cdb9c9469f4a0bb19ba09286a918b6f5b429933ae1f1449442. 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/DKADG0700128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255e860e8aa0a4d34e2f4c75877a76ba816584aa99a7251b82607c8ae0cfa038. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/DKADG0700129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96525e1b23670ae8467b086f51c75608a4458532a0e406d1ccc1c70979bb7d98. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKCC21300510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa860941a88668d9c46dda354dfd0c659e1ab2a753236f61e1c8ea6561779389. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DKDH70500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cca7a8fa96c175423cf9ed66df15df209d7cc521949eff80bc5b94093706ecc. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DKDH70500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77fc82881903af4e09a824e666e71a1c3f09fea8f55e1fbc6c5bb8687c05f1e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DKDH70500108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21bdee4916c52bd0959eb667453d60f500c1f03dd6f60eba836caa1b0e4d2276. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DKDH70500109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4cdb5ea4cdd54e9a3c5604c950cb470e7b3ff5bb54f4b268f92be6ef29639d. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DKDH70500110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef1a847b0aed4548d8f3b597633f9fb1ab0602636b677be1466d5888a26f6f6. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DKDH70500113.
Knep Knep, Drik Drik, Hor Hor, Snif Snif
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70072bd0733e2966903cd20e9def7447138809884792aaa93ba26b45b0bc6eb. 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/DKDH70500114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c9169cba50609c619f0fc9b9ac938464ff5570420fdd0574e5f7f1b022f3a2. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DKDH70500116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c89ef3bc154327caa0b9758037e464dacebc964f04f49d8753398803280a377. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/DKDH70500118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ecf8bdd0632a94244a335d58128b35eb7fc583eb8ed2ffdd4b401ee91377fac. 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/DK38A0600102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c972c550c10b4ff845f8b08d56876a715c6a62ec2e31a9bba602f59ee219f80. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DKDH70600107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c937240b71e7ce869158b237b3470289278158de9dc2c878f9de3cd00fac14. 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/DKDH70600108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272f2b982b637fabe0ca5475048327b79cb1d590f71491fbc32cb54d192912a9. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DKDH70600109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827d418177b9b9f85e1c0e86d6ef16905f79b3ba60b053ce4730ce3574391f3b. 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/DK38A0600101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ffd1819ecfeeef3d245289a715691dfd0ab18c2e63d3d373cb7014316342747. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DKDH70600112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47bf17db4abfeefef254a3204f97b7ec44ef4392dfe1207d5d6a9efcf85e9e1b. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DKDH70600111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7877af84ff472593e2c59358a4e0e54d3549209d0419d7f210785dddf6167eb2. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/DKDH70600110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97771bfeef5142865473479d23214ab7d03a3b2b863964233a2171156cd43dd. 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/DKBR21300801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc400c876daa7183835c84c39f8e826e201b132af3548c77a5693440b99d9d83c. 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/DKBR21300802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf6c5c5c863dfc3404aa5d7261aa7d7d2e7a8b051e3cc593e564baaed0ba46e. 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/DKBR21300803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19242c1e1aae85f6b224cd55bd01ccda9165a0b89c23acbf500a8bfe7e9c6d8f. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DKBR21300804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e49905993d822a9c7261a98dd43b6bbeca099b667c67835c89da71e2308782. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DKBR21300805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970628e12ec3996add049a77e35bd7a0b3a1440bfc6eb7a48867c5da3de62bdb. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/DKBR21300806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f97110eb901ae92454f89a50414ab9b90e3c0ef7d9fde7252e85bd3271ae397. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DKBR21300807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc467b26fbd0a6c16f1ef65d46abe36f66366565d3dbdd5c2b80a3eba6bf6b02f. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DKBR21300808.
Gør Det - Jeppe B Wahlstrøms Ungkærlighedforevigmix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbaf294bdf9433a89ab8608cb3fb857a869a8e9858b41b15e3d1c15cecf12117. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DKBR21300809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf4dd4e34cb15b200e9349c0873a0ea92caeed818c808d5809863636b393c52. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DKBR21300810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf423f30718e8d593e8be4ccf865d80f8db305936c976aa7c99c9f607beb16c89. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/DKBR21300812.
Fugt i Fundamentet - Pilfinger White Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58952f97496de9d84fcf8294873b91b2e9d4137cc00255521004dbcd18525d04. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/DKCC21100302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547ed127ba8f29b3a80f40c95029e96cdc5fde70443cb39ea81eca7478f7041e. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DKRK51400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0a15919723d2f8a7272aef585838cc959c8c8bb23001fde94cdac6dadf7498. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DKN5T2500101.