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 0xe4157196867a775655284e3e4303085395d7ae0063ca9d9528ce346396aa7147. 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/7bc8fa6f-cc70-4fd1-87e8-6466c1cd9608.json and https://artists.proofprofile.net/proofs/artist/7bc8fa6f-cc70-4fd1-87e8-6466c1cd9608.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 0xdbadc8d5590e3967175047438f36bbca8e66bcc5c9e27fcabb1ccd95c93211ac. 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/QZPLS2273391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3dc01ca57f03b5662aa5873bb816ca1bce41ddadb20b3962cec4e0ba20eeae. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GX8LE2496979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cafca76de64f6153321671ea4dc29b390a3313841e16bbe34d9e332b2db2249. 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/GX8LE2475307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c1370620a99fff3b57f0c4f2f1e2b62ac629f28da5a457fe27065ad8870e25. 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/GX89G2348065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e0215e9b43727bdb1dfcbaef132e8ab297f8524f65c8c7c7a6a645099694db. 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/GX89G2321374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4149f81d260579d7fa20ccdfc1da9bd4bb7a7dffbe2b47e8524012cba5d0596. 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/GX89G2388663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52df944ec20c02c8fd4ebfebbcbd9dca19c7b358b0d7a7e32047ff9649608d74. 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/GX89G2308731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939f7183c363a9738360c7dc6dcd09d9309d1dc7fc1e2541b622c071a43df9b5. 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/GX89G2375015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0bf138abe7ff5ca8e1183ef97f4567e6d854b6a74f3c2605ab11e91381222b. 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/GX89G2327500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295357b1546d1c310c794dbd93855f17f7dacd6e13baada9d5396c68082065a5. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GX89G2340608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b59d5c335c2c2ef0709367390efe8fbc77e469f285a5594ef85a2af280525a. 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/GX89G2392900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e96fb6f689c2afc6cff9f2485f6de4d4cd83204c939fcf0b784f07ed27ddaf7. 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/GX89G2351111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89cc7207eff3ade0803d007456bd54842ae718a7dff3409c98041a79c6d8416. 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/GX89G2327509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69dfa7507dfe94cd0b09f708c23d1b74269ae93a89bb913954960090a2a4920d. 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/GX89G2326326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b61f36f55f8d99491916b7c46e1ab01c5db84042b3c53d193a05821614f384. 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/GX89G2315679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5dcd70be973783a5c30422194ff61de9412934931fbcb2f251870a1ac996a0. 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/GX38U2409173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19732094e025ceed04ab590275ec0a4501dc441b0cf58c4d65bdeab09d25c83. 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/GX38U2367395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962b8889f35a5fbdaf3c81d7b9433b15c87d376aae2b4b90b86415520c7d211d. 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/GX5MX2466202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc663e938351a8dfbb82adb20ca8ac3a3603efc2386d7dea1b88c311585df9403. 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/QZS662265780.