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 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 0x22f997256418926d0edb44ef7694ded90bc732d970d541e2fe1e0f02a373dca3. 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/fa51c911-b60e-4978-a8f7-f1c9f1c76cc5.json and https://artists.proofprofile.net/proofs/artist/fa51c911-b60e-4978-a8f7-f1c9f1c76cc5.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 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 0x04bbc704aca54011a3ff1b8f9649f39272785e558b1aedb7af7895f45bcc7907. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEXC82300083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302ca1db651056afb212b4f7a66c4c78051bb2b19788e30461fce81b433818ec. 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/QMFME2399827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ba36c1b12a8c21b3c0af4e6e635c86b034e3eee3492d0a9b0175e61bc545d9. 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/QMBZ92376095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0117f1c4bf14ad96803bb42783b186d2ae21b3a6a683a7a2daa50a7c23870b4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMBZ92375865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb7b6b34665241a12c447d082fcbb7ddf2db5c79890356010fda66502318e68. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM7282337503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e52dc8da7146c42966f19d692a11f8492e28de37bf2a9ec01932ee968283bf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ZA56E2302206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a3989ae902867609ec78cf246f337080f45de5d8e5bad56f40715f4ba1c298. 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/ZA56E2201557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f30f81166a8e5658d1a75ad4a469c4b23eadea9d02a9f7f9abe38cfd9564568. 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/US23A1534003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a0594aea3436f3cf5495dbff3b1106c5a84226f493e70e5db2acc3523ecfd9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBMCZ0601528.
National Treasure (feat. Xenia Manasseh and Vallerie Muthoni)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b7532b6af4a72ec222bba392ce441d08afd88d07af12c0b9f9a0a27bb5a714. 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/ZA56E2101337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a0594aea3436f3cf5495dbff3b1106c5a84226f493e70e5db2acc3523ecfd9. 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/GBMCZ0601528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aab7d8b894c3a02aad5319a254d0d079bd59c3def66fe84190bc1472dccfe07. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMFME2167957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aab7d8b894c3a02aad5319a254d0d079bd59c3def66fe84190bc1472dccfe07. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMFME2167957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e53b79e3d52f9a75bbf711b355e695e928b3c11c85da5fafe4a4a2d9c467d9. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USUYG1395450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa3311b3d03f6002d8e09efe9522528fe4cb6b21d5062b612abc2baf754ce0b. 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/SE6XW2324040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3832c2a11b8b2317448ea4ff8e0c864259ca14ea38fa9845e8e73e6c2b249e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USUM72222071.