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 0x055bfbbea52814a5f09384924530fdf64951e6825d34a859f670bea2e1f5fb83. 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/903a354a-f646-4d61-b5b6-3b5d989ce250.json and https://artists.proofprofile.net/proofs/artist/903a354a-f646-4d61-b5b6-3b5d989ce250.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 0xbf1616ec0e1a063d60fe4623b010b896126256e004ecb9d39f1e28efe9b6ff26. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:32:32Z), 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/QZHN42154246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ef38e3f9e57ba9fdbd96a87431733008b217f90fb3bf6a627dd0442acebe02. 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/QZHNB2113952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06a558fb16205e01a389cc5fff76cc9e2cd9c3080b4f23902cd7a0b63e2c30c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZFZ62207918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1fb3a9dd2d3a9a465809fa3478014f62d529def1252b7964ac580bca310188. 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/QZFZ62207928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055f1043661f2fdb8df49fc098b131d8a58e576c5f8184846ba663f9ad0e5d83. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZFZ62207929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec71475823a5de776ed5cd516e18eae4ff7c28fca8b51f4aa3e8b8e4b433284. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/FRX202287474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d5ef6e4c5507af1dd26730270c4248a626ea1b4677d666c56188350bfaafc6. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/DGA092308406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66fad820ddf78c5ffc9f1841624bb3ab788fb27d7396fee6979448db3dd03240. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DGA092372497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d0211292fadc647da3d3ba13661e9143726579d9eeefd606776d8a6e0fc06d. 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/DGA0H2312878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aad49d04598b4e100f69f9afd28cfd6b4984e8ca081edce88795c1d8c3cc4a9. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:37:01Z), 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/DGA0Q2390517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc2483e9c2eced8ab1e47547f29f7906a79dce9ba2880fa24c1c0226e27ae71. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/DGA0R2343045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ebf14781770d6a64a2fdee686d433cc40fb0f0d99f92db06e23950296ad27d. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:24:22Z), 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/DGA0R2343046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a24e05c0f57aa04fe3e7f63fc647a5a8ea1621133d9d0255b5bdabca93fdaa. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DGA0R2343050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b5198d505b789a06cc7a3a575ec69d6166afcc19e8185ea1ed349e539a71f4. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR10S2432758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614392c7f43346d9bb40a6ae1284369ddb9cd40aa4b81fce0aa4a89c65efcb90. 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/FRX282487355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01844d72301a78d9373963896b8ce0d53953cca46a242670419d80d79fb41791. 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/FRX762402828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7614a3c9afdb48a304fb7e317e7dc807e2d5af8f0aa93f51bf3c9d2d9eb4bc49. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:53:14Z), 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/FRX762402829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6502b25af93871596df444ecb0428fe0a96ddc513af3585f74f662697c73149c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DGA0M2456317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2fcf654ba5e8bf4841734282a01cec8ce6ec021e654ae842becb0756bb2b58. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DGA0H2432146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5162924fc2588bf5c07a4ec9ec5d0defdc6ccc54a41b35c302cf59a6ab07ffef. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:34:25Z), 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/DGA0S2423725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10390eff0ee90afd790b8ed699ea1dd91145d4c229df312d1bdf409935874ebc. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/FR59R2534124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c58969b0aac9fdad7fb30866579f594e524d468d184e36ab87a748e5cb72e2. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T08:02:40Z), 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/FR59R2534125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df0fe380f2abe733e1c132e44253493062818de1f984b5fbb20cd80832c8fd8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FR59R2534126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91daaa44fde7645e67cde9cef739fef6430ed893c7941bcb2c934dc84c15872d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR59R2534127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaaeccdc18e895db8f32224493e82bda8f2a80c7014c506ae055438813b60bb8. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/FR59R2534128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628e203a5177f2e5ba1f0adbbd72ea9a19e858b31798a523cd44c1f2de660cff. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:33:30Z), 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/FR59R2534130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7605b700921c896356451a95421108fd341b736ebe02218398c218ded12f53. 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/FR59R2534131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c02e7d7afe09ef881e4ccdd0ad11c5ec69c16c9fe3300992f99ee85a9014aba. 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/FR59R2534132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9952d7efa7030bf78c77111e58c87fd1444fac5a44f34026065ce7bae412b0. 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/QZTAY2571816.