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 0x3f149e43d52793ec09a13f089ba0d70250fe3fbd3ac2b27bf61f627a316768b1. 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/a0f57fb5-969d-484d-8fe5-7fedf06fa2d8.json and https://artists.proofprofile.net/proofs/artist/a0f57fb5-969d-484d-8fe5-7fedf06fa2d8.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 0x00d1763339dd571f02771e8c6d51cbdedfbf1a5eb6141d782775c0ef69846bd7. 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/TCAGR2237688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4575636f953c709a657380f49b3802a8ea0f6bb7d7052e9b83057d17cf3b259c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAGR2202556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09adc5618cd60c9666301c66f5abeb8e2fb63620d92dae36296ece8055c021a. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:49:15Z), 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/TCAGR2237720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72e490a1fba5ba6634a6b53231b3756fb37f8a85938f34555654ae6a9a23f82. 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/TCAGR2235986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276875a96755413010b7f64906c0a0b9a41ab47e47b2a1760dfdfe41962371ca. 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/TCAGQ2298799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6f65e509c824cb63609f491d17df19ca7ad71b55dac248c3a1fb122864b206. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:22:22Z), 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/TCAGT2336370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5caf57ba15ae36e4348801fbca62dc918b75773a2f3af33ce7c722232122c64f. 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/TCAGW2370530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96c6d8ca44d917a618870aacc01a31ee4bad99e4717eb48e014eef260fe9d6a. 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/TCAHC2332132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58d83cfbd2b52d172ef59115c6c15678ca6b50a0db776d42158567eff64f7bf. 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/TCAHC2332232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae5c5259b68bc20a0ee1c6977b125edf4c628093700e86bec9a1784e5f3eff2. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/TCAHE2394393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1523343637d31e77491e056ec3dfaed1f5eb89592cf049f0206cb861126472. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/TCAHJ2337541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78eec858aada9d0db780ca9e6a8c122c222c84c19cb037713a0da58cd01ea29a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:12:35Z), 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/TCAHM2329714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ea13ba60494889d12ccd9982a71d1dbe29e78bbb805b22b6c65ee70c3e1c84. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:37:01Z), 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/TCAHZ2436907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd73e13f5d33aa687b6a97cc9c30d5996a45e33b75af28893906c360ba33395. 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/TCAIE2419248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95eb9f4d0aa75c81112f454dbda1ed1ca9bed382677529c0aa0c524ed2d46b09. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAIM2486152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b1d65c0c35218ad7aaa96e924efe96f1d10fb6aa8b28fcbe6ea339de99d7b1. 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/TCAJB2456385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd368653a109a533c5e68bd5dc869422058cf03e9f16e9100dabc8226863eaacd. 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/TCAJG2532802.