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 0x1a77792b49fa1affb3471f9753d4ba7b86f7ed63885e79e78a380d893d4d613c. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e06df85-b4ea-4786-859e-5276c926b70b.json and https://artists.proofprofile.net/proofs/artist/6e06df85-b4ea-4786-859e-5276c926b70b.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 0xf8b9005193849213aa37aed8df6667118888f87bf3394ce1907fd41294074c27. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBKQU2088905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf631840ba7368090ba70748ef690584f97a4fa9e6c8675f2c3fdbd3e3840f511. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/GBKQU2088906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaede94ca1b0e211bc58c99a3dff5918c88d69e366d937bd3a6d62240beb4a3e. 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/DEY472081082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3c924202e86813158d44958cdd9a7d88a879ca9a0509ddd30e8c157173d8a3. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/DEY472081084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67415d3317e782a1fe6611559b68d48b7304a593650643c5de557f1bfa401d3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEY472081085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9574886e4816e309d37965157e5e6c397e20c986e06916434969161203870a71. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/UK6AK1400280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b010e842510a47953ad7b67f9d5f7f4a5aed58613ae7b75a9a44d8456e5577b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBKQU1980048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b25e7205849d11c7cb2022a12e4c20707681912f0b7b571f722c85ab3cf0d0. 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/GBKQU1980051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8e90f962cd5d23ef8a2cce40ba3b8826acddf57e5c28d573fe0ac90041171d. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/UK6AK1400236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd6108cf2e92cb8406d65bb07f61533030ff9bf4cb1526be77b9b1a99970876. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX281726176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf01a0ec57797e2ecc87bc75e05df6eb80ae3e1a57ce526dbccf0e05140e5f03. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FR2X41633244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1c5d4766f1abecad07f0002171a6bb550cbfab991f16bd7d8c7bc8e793cba3. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/CA5KR1048039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef84ba1cd1ef07813156104a9f5f7ad41d362f6b2015d9ac565178fad7ca2c3d. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/CA5KR1048040.
Recurrent Thoughts - The Willers Brothers Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf14cb8d2c02763aa659824559e364ccf9c7d329b0df96e60c2069c0b2800a5a. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/DEY472087695.