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 0x3462a73f16e823a2174ce86f1afb7e1322c42e6d5c6616b423644bbb878a6ef2. 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/90843ebd-949d-41b5-aa99-eec366da6f54.json and https://artists.proofprofile.net/proofs/artist/90843ebd-949d-41b5-aa99-eec366da6f54.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 0x21239260b0a8fd57589b19fbb97967e3225b1babf3146b6c0ee6255e14e2775d. 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/SE6A92082651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34541f4cdf598a820488a12f1e6da5f75cd6ef7f4f08e945a570ceea23462d6. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZMEM2277215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27bdf1ce9aad91112b2295378bfd62fc1811cbb53bf2cec66a645859ecbda808. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:42:49Z), 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/QZMEN2216815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb93e965d97ebe002d7a76267dee556b2f2294564e9f95aaafa8543d3d4ee71d. 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/QZMEN2201178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a628476f413612bc5f4179fd7a1876011a2beb32df17a4a03718f4565ca825. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T19:03:13Z), 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/QZTBA2229037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81eb2d82d9d69f9ddc8f716210058b45124c8e4b8944dc732da679b057f1d2c. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHN32371779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8c6493c534fd7fa76deb59a513a4cf980ab8eee822e0176bdf6001d73ad23e. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZK6H2389196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034d86498a8d59fa312c791ddda6c829807eede68da0b3c91132e2878f706b04. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTBE2300880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77eb88a96d9a17e23686c6e53a0f8eb18d2f74c2c58d79336960ed4121b48691. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/QZDA42432784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3c884258b1bfb7423addeec4319887d6c3da06dfcea44f68a5f55acfdb729a. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZHNC2435278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16bb36c33bf6fe423f4a8ff67b013fb80785a5afc07bae163c8310c4cd06bae. 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/QZHNC2437895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a42ffb5a6773c962d5e46075869b37b74d9c02f0919528ada5ef9ec74063e99. Chain 2 (Bitcoin): anchored in block 957690 (2026-07-12T10:16:40Z), 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/QZWFT2411954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9632c362ab8939ca0c2a0f1bbb11ba949f08dca42d86c845af08ebca919f7cab. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:52:18Z), 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/QZZ762460309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7074c013ec96124407a6356d15f6fdc8e8342aab61c422deae09fcac52b571c2. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:46:59Z), 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/QZZ772467146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ee3c221d2131a53f4de2207a70eabbc55b21adc1e8aa5caec2e36c5b7a7441. 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/QZFYY2544767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b2aef4b83e9185c64d70fd6026de02019f8b86ee6bb38cc59977e2e01e67fe. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZFYY2547933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2cb5642c4207cb3b8e60378c6f68baad4066ed2bdc7b7433372c29386bcf6c. 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/QZFYY2546447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb601ae9ed8a379af7afbdb576824e1493784a07d9b2881e581eb67dbe8f717. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZFYY2544763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6adc02fe45a053df90f2331158f38d1d0bd2d811a4087a9ce5471c80b55180a. 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/QZDA52519369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0199b8eff9f43ed4f799c8475ddeea0580e0c848f7ee3bffb553f4e255f30315. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZK6J2540043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263dc436481fdadfdb14f49c042f04a5a5fd3006d9037931e9ce04b560497cec. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:01:47Z), 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/QZK6J2540029.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff2657b7a2e07bcbcc7035d8bba4d5dae25d733dd433dde62b009c215115a77. 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/QZNWR2508303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2782a75eeb03ba4295b4031a873c66a85fb14fe9bb58ce06afaf05d6795a96. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:34:10Z), 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/QZWFJ2584364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a73135142fe1d52d5d46809ba02794d87970b358e9ca87c6496cb83cdbd974. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QT3FB2559532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8f1f050b39c42f4d78641443f9593fc5a12478ddb6e2aaadf3b203f006d72f. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:52:03Z), 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/QT3FB2561925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f87879a7aef859d5dffde93c586d8f10bf640f038c0da70c9831f1a8afe0be. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QT3FH2591927.