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 0x2ac02e9d9c004ddb01a826b466ec4c6ce18523d207ec77174b5f61d10be22324. 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/f4c1c8be-b9c8-424e-936d-bea049876ff4.json and https://artists.proofprofile.net/proofs/artist/f4c1c8be-b9c8-424e-936d-bea049876ff4.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 0x53bd08f9921679e37256c51b604bed8a5ccd0ea40550c46ce100f9e545fdaedd. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:16:54Z), 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/USA2B1803784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6c2844bb7e21fc9943fbd5f707719c300867a1823610548b66e582ce2f0687. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US3DF1817863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16afb2abf5626631533ed8440e777cc518fa1dca6657f9bccb8f1a08406ce96e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USA2B1804377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a92fe3a396cf4594ad85c6247afee3bb6e4017bbc6c12966f0061a63fe58eb. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:20:45Z), 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/USA2B2100896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b1e6c2feb8824b87c0965e00aea32f8ac14eda1acd07026c07e68340f7aceb. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/US3DF2583957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac2399923cd7d29fd95ca5b7d97f4fbf5ba44952083ec380135c79b6231c506. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBLV61902977.
Osci (feat. Claire George) - Kyle Watson Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94363ec1517fbbe70d4de10b9f3372adcea59199d793080c54bbf54ae8d4fe7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU2051375.
Lifted (feat. Claire George) - Martin Brothers Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8210b32a92f9f74fbc051c5d3a4a27ce1d93efdd5ed872501fbaf85115fbff2d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBKQU2051388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3870d9124bb7461f05b35702d966b3c1d8a3e77a8a8dc7c372cbe6f677e39ff6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBLV61902969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94363ec1517fbbe70d4de10b9f3372adcea59199d793080c54bbf54ae8d4fe7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKQU2051375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8627ffd1823c63db28ae4ccbac5bcfc2bf81bfe10848f5f6f28e7cf7d59c34d3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA5KR0036114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8627ffd1823c63db28ae4ccbac5bcfc2bf81bfe10848f5f6f28e7cf7d59c34d3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CA5KR0036114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063114c30fed7279fe3333144d07ddaffb145498d2cb653a11ad1ae0fccae5a7. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QM6P42474936.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2c64c4452932d6264d24f6f62fe8399c18404338080fba034258a188f3ce00. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/CA5KR2241477.