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 0xf740b82fb6b57baa36a6b52be0ed9df0729a61f859539837048625551374b1f8. 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/e1988abe-23b7-4701-a054-5f73bcc0597b.json and https://artists.proofprofile.net/proofs/artist/e1988abe-23b7-4701-a054-5f73bcc0597b.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 0xdbc74bc1551d762912cee552c3658fe446b595317c1b3f96e40f81ef9f6ed8c5. 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/USJ3V1876840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81096800b1a74abed2ea5f06503448fb4ac8face161d19899b53de46ede031e. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USJ3V1876848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b940144c7ff7a7558fb3e4aa4c323c8cb51c1786c2894e27cbad941d0fc290. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:34:39Z), 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/USJ3V1876849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af28b0eab8f1b1487c8a8dc9e9a180ff5fad99e2bd4a265235f4f15140b6229. 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/GBSMU8043072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0ae5d052f9731733fe5b7c9fa3ba9cf8b30af862fa83a13f143ff64959d4b9. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/GBSMU8043248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6156300368f2c5ff9bef52d3d353b8977631f590319666a88933f9377fb0a6. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:49:27Z), 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/GBSMU8043382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee302a7698bb4a42cc8ae2dd8d83c038fd3a52c23fbd265ff3b52e6f6152bcfa. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/GBSMU8839175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088e35c4105748612190896dcdc91578fb9026d3b496086a8f2a50b5da459584. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GX8LD2337681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43553bdfd59e8e960b610c6f9c7616ee47c01a5a187aa5470b57c8d1d1225e1. 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/GX8LE2304305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa305a64e266e13bb1e31edcd397e7026febb3fa40c9a7870ca356a4851141426. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/GX8LE2350694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c73263bf13e657780f74d3c4e25ca57eeb87af907fdc261757e609e94f5f14. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/GX8LE2381731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63cc357d00aad9b47e553681343b825a3cb8d765ad42bc25bc331c23dbec8d5. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/GX8LE2303746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502df56719fa36949975d73017fc0a4bc39c5000f607d7f549a02a88dccc98e6. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/GX8LE2329223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c089b8a43862cb41a2273f458bacdda51bb07c4ad40a2fd233cf8ecc765495. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GX38U2551127.