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 0xdd9cbcda0ecfe709c058c7f768315376ad687246a93376d120c89e25fff8b528. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e33afbcc-5f3a-4493-9583-5b9962b96d39.json and https://artists.proofprofile.net/proofs/artist/e33afbcc-5f3a-4493-9583-5b9962b96d39.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 0x31ee6bd799da92e360defd608625225626df030b04df36610a87ebde98cfa914. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:34:45Z), 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/QZFYX2107335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf836234b0e153001ebb054b7beead415b6dbe417843152f4312479515eff8b8. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHNB2139261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd8606fbb8779972406259da53ee483f88d47f1b377a041b1bc4f419131fe9e. 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/QZK6J2136697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8daa7ff66f1510812847f7e8afa6a00bce2cbe0bb977963c290e56533a9210. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZMEP2199527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f9dbe50f7bbcf3bcfb803cc708653deb18f6634403dc7d89bd9846449cdf5d. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZPLS2168923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f9dbe50f7bbcf3bcfb803cc708653deb18f6634403dc7d89bd9846449cdf5d. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZPLS2168923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2173472a5c10a94999cf8925955ae88525491bfa958f4798ba5cdd064545d9a7. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/QZFYY2230062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2173472a5c10a94999cf8925955ae88525491bfa958f4798ba5cdd064545d9a7. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZFYY2230062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862eaa832b882aa82383746e84033ee98a426b6345393ff70a0fabfb2a9600fc. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/US3DF2206977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb7e65cb35bc5cb5e69b59e019ebc205b4883be20f4cd7e4bb3af06570b7fe3. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/US3DF2215865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20753bcd968b21ab5b1ada0dd9fd79aeff6446eab30d58cd74271888170ed729. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZDA72251870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20753bcd968b21ab5b1ada0dd9fd79aeff6446eab30d58cd74271888170ed729. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZDA72251870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2462ca71a8944bd91d9bf70d96e4559d9fff42f2114370dacff295e79701de. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:17:10Z), 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/US3DF2238038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02001084cfb4b7ba6f09b39c4c786ea8f8aef9c3fa1bd7ce965dc8124ecc8b18. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/US3DF2247290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7523e783c21b58664818b7e2175d7444536eac5802c285076a40e7c75958bbc. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/US3DF2253693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e662eca387e51a2615a5809f5dd2ed3a53ab5ab587ca33b0820ea00de7e4a2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/US3DF2261647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f3aa897ef0830796858bf957273e5f22936b45aa7d53699cc30b75a1b8f3bc. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:38:32Z), 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/US3DF2262110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd01ad4e647ba2ef1ccbf7048ed8153e46ce0b8d8e363ef147474e1ac736cf70. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTAZ2246968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd01ad4e647ba2ef1ccbf7048ed8153e46ce0b8d8e363ef147474e1ac736cf70. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTAZ2246968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355a7bdfb79f90365a9a6a66331f781a06d64266c0285ea1824ec283de6ae7a1. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZDA82322986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba7ca964def82970acac9d8ebcc322a53b7a79a9eb616be2703dfa0468e2023. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/FRX452304676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3cf476d4f127cae01c175f16443a8dedb2d12f299a35f7791387f8a63f6ba0. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:48:47Z), 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/CA5KR2379545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ee3fba01801298a90c2650ef38af6959b4ddbb0c239cd7c69f6e1d625ddd37. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CA5KR2397770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b86477f523e863a98bbfe0e20c3207a7e82b081579c42422c33818e1850db6. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QMANG2249561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109591f9d20a47bbe920495cf761dea04a4283fe32ec4688941f84f2a1f3eb81. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBLV62317211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4096732832136eb7441e92c4f6b0ae8fc21f5d85fa654f8d5101800781364ed5. 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/QM4TX2430663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8c5da91915232eb6645eecd539513ebdacbfa3640dab2aa0efb9e58a4a11b6. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QMFME2520517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6badaa470aea1b2e897cd6314c5b6f95c6d54113b417c9de77886d998bae277f. 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/PLX632200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1affeaf9fe3ac7b67a7316360db2b99decc0af090f2dcd45a016a38651599234. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZMHL2077814.
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