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 0xd9b590bdc5642ddbad70bfae0bcb1ad908cb09c9e03f1f17a09a5a2a8ee13ec7. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28703b56-faaf-4a9a-b823-5a352b1fc12c.json and https://artists.proofprofile.net/proofs/artist/28703b56-faaf-4a9a-b823-5a352b1fc12c.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 0xe53bb848511d2fe964c949401609770eab84ea506226cad10245e13a8f337416. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZFYZ2134551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df437aad3c6b581ff55170d5754a73f389418701e5eb9ea8ed66b3c583e3896. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZNWR2149017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447f63d9c2ef9b9d0035ec4376fa4cc8e037aa95f44b5a8a02c908025c56f296. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZTB62282103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848799ee41141515f03b5a5f26dc0e972db93a1431fd3312a355ed35acd1fad0. 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/QZMEM2304267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce5e5c0276f64c108593eeeba14c70336769f5be8ce165d9eba91436c826715. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/QZNWX2318620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4955c098dc19f41730b454977cc697b231080690af918b346cf293831cf36634. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZTAS2413414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b411dba9c343d4dec79db5d97efeb30850cecdb566955b2da04d4fd4bb83f3. 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/QZWFL2419491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa262ee802c7fbd5d83041f168503d631e45164f06e7a635f7c7d703791e00382. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZZ7Q2439670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd187e07660bde93b5a1126849a99f332963bce76c19e6a21ed2e7e37135351bf. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZZ7S2418982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb160af1de0d4ab7378a540a1430afa91c7db8e2bab3062be5f26dde4845f805. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZZ7V2454163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135ebaf2b421a106ac4998a6d2c7599b4a131853f86d2ae8fb8ac069af6dd2b7. 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/QZFZ22520461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e982153e703990fd4fd5e9e83586162d2257725d75d61e3e59e37f28df75492. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZFZ32569383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0238166071f2f566f8598a90dd3d7748543aef37998b3daadce8da0bd8a4fb4. 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/QZFZ42574067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe682bde99c014b1d90fbbfd62ca58b46d79443aa41df860045996436bf43de27. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZHN82526544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc9207859b5527738dba33fd76b639925e6d2fdfab4e3c6ca5282f97535dbf3. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHN92583989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37635705ccc73f4152c9c1751b6b0a8e322def9b018257ce7aed7b3bc22995b2. 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/QZK6M2530712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d11e74d49dbfa818fc66cca8efd3e0410df573e93bdaaf5bc1e33c264babdba. 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/QZWFT2554358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51851485a478bc90a971b4051ddeadceac07bd950b848901ab7a2ddeaf2da612. 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/QZZ7R2532035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6b7edebb89bcda134f1608d60e03cdfabb69029317a034cbfa21be7b97436b. 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/QZZ7U2504332.