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 0x4fb586fc4c2a0f38cdbe325a015ba7fd47843d28b4532a4f2a2e0168728e7714. 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/6ecd5735-e9e5-4690-b59c-a01cdc3386f3.json and https://artists.proofprofile.net/proofs/artist/6ecd5735-e9e5-4690-b59c-a01cdc3386f3.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 0x501b2daa114f8ce2aee0dad0786a03a336e7aed6047bfd9904e276b3ad4451d2. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/UKTUY2470432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c77896b5ed1391bca9e018c8310ff83385f85d381e426038ad2d9588ef657b2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UKTUY2470472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3105a55ab526045263a7fabaf2a5163f649e200de8a2ec63aec8b5c423e83d09. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/UKTUY2470536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1d243d43ebdfad8132580a02452df9ddfd5ecb0265cc4f4ce58e80a81d1414. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UKTUY2470538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83dc22570c560fd2b336fcb8fb6b7de5e0357cfcea9bc33bb710deec89dfd18f. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/UKTUY2470540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b294421982ea5aea38e68df670adffc34dd5ef2d69e31a7ef8e92194587e472. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/UKTUY2470545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd484a2a840885fe02b821638137eb7884f9bdc5c720317940e7699871d6e11. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/UKTUY2470518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cf0ce5d92b8a925f890c19fbe73e69925215b596e4a59ceacd01c5b860cc48. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/UKTUY2470532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69687c313c762d1df9aeea1a49ab1a773ec30b555cd3f10d290e3028b3e209c6. 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/UKTUY2470497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be6c02db151b1ed89a7b4df8f5f46a33f7d5a8715ff31516fe3344948af1026. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UKTUY2470499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22f6e4590c295054ca82ae578fb15298ea8895a3e79b0e0363d68f084299584. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/UKTUY2470483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe649c4c6e0192dbd01113d18b7531b064ffa75e70cb75b105af18320c5ddcb1. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/UKTUY2470487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2adde93dcd63fd18df2e1fa0412396598dd4893d85afa991548a730465ac65. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/UKTUY2470477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef1b8b0ac457694fe575f535194aca25f31bb54a4309ce449b5a88075c39c84. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/UKTUY2470478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288eb9e7638b8a8f062032bfcad3989c921de37badd1fe3ced3f35985f9a8284. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/UKTUY2470480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64ccf45cce5c1beb16648ffaf6674765eec4e1d998c60473a84222f01f26136. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/UKTUY2470481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dab2c4f1ad346f24dadbd39020b1a7c70335f2af2e7af254dcf48e0d4674d7a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/UKTUY2470482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb7a7c2da0724d9408fda12b7d3ec338f01cae04556b69f4d366a8f9781dd05. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/UKTUY2470590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6569c97ddaf139090e09fe106da4feb6594bf1d0e489445142924c463aa98bd4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/UKTUY2470591.