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 0xbe96ed47fabe5eca3551ca1cdb354499327b890288f4ea8610b1681168cee1ac. 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/4d702e9f-4817-4fdb-a2e5-98bdb8ba68f8.json and https://artists.proofprofile.net/proofs/artist/4d702e9f-4817-4fdb-a2e5-98bdb8ba68f8.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 0x37d3a9e19cd5c49b512e7a3e6ce25ed88234a2a98cbce82563a9ce6b845a4030. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZMEM2255630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4371b93988eccb7f55617decff313737b04753cc2a2ba49e6ed569746fc4c9c5. 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/QZK6G2216526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e25df8439a5186267d166d5f5613cc9d9c04abdefb7a235dc2f78db2e509a34. 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/QZTAZ2251517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a043430c42522abb38a0990eda96f5025b9d56ad024abf77a89ea601e19401. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZTB72287763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36695fcda9b0b994054c989a4121e6a989baf37581c56aea5454e6ab0d5944df. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QZFZ22325755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0737275e652f804b9e514c345077b0cfa937b9bc75d49d674c74e2d274b042fa. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:50:05Z), 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/QZWFL2359229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a726b10776a8073ef2021f84be3e1253b825f32b5601a88381a46e3300f9df1. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:50:25Z), 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/QZFZ62433116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab7e0f75c80450aefee1a3bfa8b8705adb3292f09d0b947704a495bd75e2544. 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/QZNWQ2432022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8adc7321cc5be4bddb6a28cbb769a0733110364e551d225733c8f29d319a2cd. 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/QZTAS2473386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54cdbd609fafea1d637228613402ca7176d84c6b94dbcb5ac58948ca64bc9156. 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/QZTAS2473387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622507962695a01d11cfe4693a7c4ab7e1da7e0b263e22267aeeb0b89c25e7c2. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZTBB2485632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7869ea6e802ce38c3c8b7980b324b860e6c1b14ea964ec41f263bb45db2662a. 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/QZWFT2417142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086b572f2486536d2e356fdfc3786b5025e1333e9f8633899820eded128aeb80. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZZ7Q2436846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194e2f432885924d42e30fe669157532a1eef6589fe9b3f989e3cb059422555a. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZZ7Q2436847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358d3a193c0eddf2599bc404b8c8c6c9bcffa90df9f8ac2206df1fe365b55b21. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFZ42549181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21835e0220b391e8255c88ea8a85a321aa956e633e5f8e390926b86e87136e5b. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZES72544618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd547809622e537320efc12a2859f337fd42f5ef23fe85f0a11feee8e0947bcdb. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:46:19Z), 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/QZNWQ2521744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6e83eea06751ae315a29a713408b8304b07bd85483cd0c5be1afa6665c9799. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZTB52490120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2aeb0e34dd80ad50a6349ec8d4c094bf4fabb978c4d2227425260231de41615. 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/QZNWQ2521747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14bef2105cff847f1412295d41e50fca6e7b6a9c104c199fb66d0a8a7237f8df. 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/QZWFJ2595167.