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 0x8bdac72ab47cff59191586b64c7fb22eebda967b88e4847b5002b932b70e5184. 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/3a2f5533-ba88-4a6c-b172-17a114074fde.json and https://artists.proofprofile.net/proofs/artist/3a2f5533-ba88-4a6c-b172-17a114074fde.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 0x1126bbf29f23effaff34318c148dc99038246947184693b44f3ed39937d9cbd1. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZDA72263327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc352500a730f4767f13cb7c3e56c7286b1f96683858406e38e4ddb8b3f970367. 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/QZES82231398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c137e226d139a304426f5abc2b3a4c7618b3841dca7d5d7eaaec3e49aee05ef. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/QZMEQ2226984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9289230229987cf51cdef8b25661fd93aabfc03c7daeb213c592f3e329c1b3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZMEQ2226985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0daabb57d8c12d79e984eb01daf30729d19488267a20d22e8154ea1397d05fb0. 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/QZMEQ2226987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7247ab5bde6b19ebdc822ad265c1aacd5e4e7a7a1ede401958137e27b53958. 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/QZMEQ2226993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeaa932dbad2d72114c7c64f2820c16313141a83480e278dfc067e902462d7f6. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZFZ42311062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6a5fe2d212d605567bc1f9828d2a486215e22cbf3301b2c515207657b06429. 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/QZDA82383686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00638697907168825093d9fa16a6897f5917acaa3caff5c80aa7daa669dd524. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QZDA82383687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fe5e1b2a87585df3da55bca8e1de4099c10c7e4fb92e7310af9a746fc12d5a. 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/QZDA82383693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c02c88958d20b6090aaa8407654105872d858436d8eb3cd25ff3cbb6a92fe4. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZDA82383697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a6c71d524eded94ce58243b95dcae14c916c993c85b14dc39af92e10b662b7. 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/QZDA82383700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e52c78ce152e30fb612c12004a1d85aab498655614558121db394629ad1a939. 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/QZDA82383701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1fc6f7db73b0584ded4edfb082b3fd08946b83f072efe5cf474a12140bacc50. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QZWFK2319642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034008539ebff593550a863c39b12f3fd640a49ffe52f32334c1c40e7e2c07d3. 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/QZWFN2331228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc066f42fc25078139629b9835f7ce64b7ee057d61935d44358cc2cd61cf3a905. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZWFN2331231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb48b1d569006a549297f0dc528fbed7a99999657b037767275f4414c5ab98ca. Chain 2 (Bitcoin): anchored in block 958676 (2026-07-19T05:43:13Z), 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/QZNWY2432752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26aa722f1c37ed37c53e0831ea7e98b229f1ece6f65d11dda486dd64bdc50e9c. 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/QZZ7W2463784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa286cc02a150d1baf7e2282d532c1ebd56a9444ca7faccbea922101a144b46. 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/QZK6M2531531.