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 0xd86fcabb68001b781547c0dfa3bd2ae6972a414d3dc0f0592f34e8ec0f5506cd. 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/6f4022d3-df83-4c3e-bad1-95f53f389463.json and https://artists.proofprofile.net/proofs/artist/6f4022d3-df83-4c3e-bad1-95f53f389463.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 0x26256ba738b1e7944af61dbc888061b4bcfe9524725a5b61dcf904662a023bd0. 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/SE3OH1722430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ce02f7c7e5275d7701db8c7a2410e50d4081db4019cbd31e847c317fd3e089. 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/SE3OH1722425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc490e7abc33390bc70a37ff767a8abc90a70657eb5c826efe3ffbc63c7bd04c0. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/SE3OH1722423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe11b847bcf3b7f1d99e3f8e7991cd58b41fd9790567c9c57769c84434de4c87. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DEUA31900290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081c30a69dbce6efa80538506bdf4fa5de6eb510a82ffc24dff00e6725ff851c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/DEUA31900295.
Dieses Riff (und dieser Sommer) [Radio Edit]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0a92a7e67222067eccaa3ee6df3e501b56418532edd7367bd0b43fbaa81744. 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/DEUA31900383.
Rauch das Leben bis zum Filter (Instrumental)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcde5904ad5e11065184eccce6aada8c3bbcb3f93f7d6c0de20aca6f8e1fbcbf. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DES372100376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab0be8ab58f69ed9bb8ca4f29e2b2a9929145ffad4539fb8756fcc6f58a3723. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DES372100382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126a33b9249593318e9cca6af7d6da548cfcef88b664225f5e2768adf95062de. 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/DES372100383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb198674ad6adaedf256525fc66ed570d5ccc256d38f932deb2b6f389a64196e. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/DES372100384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148a416fb3731bbff25eeda00084f574b37d0cab2ff352a3e9f4507b955c7eef. Chain 2 (Bitcoin): anchored in block 958678 (2026-07-19T05:59:57Z), 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/DES372100385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d66e6eb755ffcc438abb3c940668f1e72ad51c928fdc28fe03066990bc1333. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/DES372301093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087e6b7427c588ed505ffd13ce6030e8ea96b1bd7874a7d79c09016a7c0816d1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DES372301087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8103a0e1ec5012d8b6d95abb707efcd3a983078a5a2151798a86cc6665141c5d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DES372301089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc688c7061e613f2fcc4fc600dc4efacc8f4f2e0ac7f75cfb272c9f3096297d. 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/DES372301094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8a00dca273cfec5b375c90e8511029532b38accbe4adfaec9faecc0006a1fc. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/DES372301095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd908ce400c80997aaedd2c2add79ba1875c30dbce0684e0f48de649b4f4c419b. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/DEPI82509634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77010a0badcedafbc18bec83240c01c0e528fb70128f0783f7c7c74be7a6f665. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEPI82509632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14bb4409dec68ef181daa8b19fdc8a4b3c43bd85c18b00eb4a0683ec27e2e945. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEPI82509633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd908ce400c80997aaedd2c2add79ba1875c30dbce0684e0f48de649b4f4c419b. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/DEPI82509634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60f0345e368c5e90d78188fe51417770de9b15d0a880a5441dfc3795107a4d0. 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/DEPI82509635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66bcd83be54399c6ef39907c68202a8731294d6ce5ba9263d549b38c175135d3. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DEPI82509636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd1e631fb88c426732761a71a512bae1a44a30fd1c2a20402520de91d6d162a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEPI82509643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45e42a3d54fcbe8ea1d150393046321d40edfdd9b0f2c860b70ff47f075117e. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/DEPI82509645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a6dd7746a870ce6449765cba3f4e8bca6189220ed9da2cb772a80f0ce227fe. 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/DEPI82504069.