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 0x4527c1a2fd96211aa7639ec6333c23d109faba1e833df9dd43b2e2604e94f871. Chain 2 (Bitcoin): anchored in block 954593 (2026-06-20T19:46:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bd78c336-1411-4fe8-9045-690e74a95489.json and https://artists.proofprofile.net/proofs/artist/bd78c336-1411-4fe8-9045-690e74a95489.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 0xcc740b7c2bf4df8572ff53cbbce4c3785a74b5db8d9400d585fb7141bc7da060. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZNJZ2479690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7afaf59bf77b789645ad1532e811c122bf2c9505541eca6f2b772bdff853e417. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GX53U2377027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fc8377f510ef2d23e9e9d86a9ea69ccfea26647bb1e2a220cb734d54d0758d. 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/GX53U2354400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8afb43edd289251711972697e4470f03aeb86b9b02b27a7490482b8f0c7868. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZ5AB2416861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e3db09693f19962bffb8a089b44d8e6fe1cc416c7e433da493a705e5b6bb82. 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/QZFYX2467087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91a8147ed75ba4446982a429cc40e480ffcd71591ec7cc9a5cf8ce78133b0d3. 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/QZFYX2467089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf876f63cafc1fdaf71b13ee447eda491774b5134d8ca745b00e58eac8dbc1862. 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/QZFYX2467090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee723a92a330cec7308a7142cc7cfb82c9522f7b9841e29504fd3f2d0873f437. Chain 2 (Bitcoin): anchored in block 957210 (2026-07-08T18:28:05Z), 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/QZFYX2467091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003f110e8dd0ff5571a66db37b2f7f312423c3c12aed26ad3d5b7ecaeb36a1a4. 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/GX53U2689047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb432a82c4925248c8e5c9ba5ab9bf30e3891e02a3fb8ef46f8e2eae3dba864ea. 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/GX53U2689048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1ed5584c7fd0d2978813e972796075761e17e3cfd43087307f75dd28ab1571. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/GX53U2689049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7788c916f67f86c56de4f712c4013496e1ae29822833bcc0299e23e0a37fdb. 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/GX53U2689050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e33be28d27009a858c6dcf3c6d90ebbd20f5550cfe36458f5c4afec3aa49a02. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GX53U2689051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b12d58e970c7131e58b861274be4efdfeedc0298af6ad6e9b2bda40afffc22. 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/QZNJW2532886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55bde5937c015a2d93a30b83018a1526ae64fa45fbbffb3f52bbe5689d144414. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZNJW2589622.