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 0x654aff93957b0f783fc91e58a022caea0ea5d0055f2305506a7f24f4b3e0902e. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/48561445-07e6-4d17-a77f-6b750cef7f65.json and https://artists.proofprofile.net/proofs/artist/48561445-07e6-4d17-a77f-6b750cef7f65.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 0x18c691eb8497d4de135f4369b9dc73e0f8d996154b7bf2eaf3044155e80ac3ee. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US7VG1873247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e1b47cf69ef27633565d937fa9be33169b815c68658c2ecb0a52280faf87c0. 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/US7VG1873248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf341b7fdfbc1494170cbb1c1245207e31c77c3650ef83fcc7369b2bb0d01608b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US7VG1873251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8a6a2aacaaaf4f4801edcac4146a36c6056efc4b68b78896eda68a6af00a65. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US7VG1873254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25eb43383acbe8e22a99c62f7c552d3b8bbeac8825bd1944b817be48475bf286. 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/US7VG1873255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb40ff1ee49821ec2bc0a378970a7c891fa981dffecae2458d2f31ec51ea5679. 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/US7VG1873256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8edc5c865fa8bcd8f9feb89ad6a4f85109cc5d85a7f82bb63782992b2fa75540. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/US7VG1873249.
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 0xfad2fdb343f701d69ce40c069662eda4b9bd14ef578607e744af70740655dc35. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/US7VG1873250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a536a5a10dbe08feffc4e686463e690c11ec2caa92ca979aab9b6718a601e1. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/US7VG1873252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9cacf7ee140be9b78ca2ab83842822f9ad3e48fdbe084825afdaed47b5a1e43. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/US7VG1873253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf1f13ace905e53d9741c9c67f99f1dc5af023436883284bbcc72b094778981. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BRUHN1400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539ece51bb3681c70ff1d45c46eb24256db2bda8022c959404f8c771745f9bde. 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/BRUHN1400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74193fc896dbba1e72ce374b2d86ea8ad4a1619fd2f062d6e9ce5135a71ae83. 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/BRUHN1400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4995c94908c3cac9da6298b785c47a4f45ef95b154a073c6197f39e42801a8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRUHN1400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd87ce07a0626c90376a5608caa3a63fe66ebe0e9baf87499486de726ef12ba0. 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/BRUHN1400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5700d0054f04b7c497780906b38fa0ff2def4a70fbac2bd952b07e5cd561d2b6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRUHN1400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde819d9c92555924097a7c21a9a470053c965f946758524b7d7358ed37f9b40a. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/BRUHN1400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade90e8ede2a479f7d4769018a8d82c2bf8a30e21e70e308356979cb7be8cf92. 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/BRUHN1400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e1f8ee1d2baaf180eefeadd4629299f586b74ecd2fd67314a9a2ed3c264130. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/BRUHN1400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ce81db6d7c1d920f7408619aeb2641577f6b4873512b48ef60307e8b032b55. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/BRUHN1400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a409310dd8a729e6e3acc5a6c09b642c63b2e5562a613fe1718723553eb96a6. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/BRUHN1400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97b2f31a6df85fc94a0071344981a17ba579c6b591a3104ee261789588c1b39. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/BRUHN1400011.