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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d594c14ea3f451a740b01648ab4a68d7dd8e3b4ee0b6d934f743cb4d51a56ca. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4a1a426-43a9-47cd-9b47-b8c2949b28db.json and https://artists.proofprofile.net/proofs/artist/f4a1a426-43a9-47cd-9b47-b8c2949b28db.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71fa3ffe10f51c89015a08114c28db9222a91e51689569c1a2dc40e36021b587. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA6D22200335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a0da8e75753d5b383d6739ccebfad9426cd83467dc43570fd0ab6d9349d095. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CA6D21400095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b808f9e2ad87e0b50f65b1194afa391ff73515bd5513e5fea48caf3de9bb458. 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/CA6D22100699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71fa3ffe10f51c89015a08114c28db9222a91e51689569c1a2dc40e36021b587. Chain 2 (Bitcoin): anchored in block 957012 (2026-07-07T08:27:05Z), 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/CA6D22200335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69211989a7f1ec97a40df2980bdb9de1b786e849924aec21d709f9ce9485fb7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZMHM2223852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e42d0dda34af0feaddaad3c256219380d236fdc26194a54445af4e5556d339. 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/CA6D22300262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce21ed2af86a736c0991d54d5d756c1a0e61dbead91e8db89a5edb49e015602f. 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/CA6D22200659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b808f9e2ad87e0b50f65b1194afa391ff73515bd5513e5fea48caf3de9bb458. 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/CA6D22100699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3943cec823257cdb2795d1ced5061abc3e1a6018ebebf0dfc9003886e19caf34. 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/CA6D22100140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a977c0e6ca2a3cb34fb27dd9f46d3025b949c0542521624e348d0f7d304cfaf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA6D22000532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2aa5f4c055b0fa119584ea6ab9f5054ddf2b9598fa131c254f6e368e8c9f78d. 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/CA6D22000303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd8f1ca5577be41b7d896d6bb2bbf6f8adb69e7c978f04b488057626d1feda3. 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/CA6D22000205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19833ea0a8a7a30de955da79e3f37507c3366c12bfe96ae224b050333565900a. 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/CA6D22000198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3644b81e295206c9c2f68da06bc8e440f713ce4f1a33153da2e0a5463fdc0b. 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/CA6D21900417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9e13028fa191eb162db1d5ce4ce8b8afb02340aa3256819c2b71ab7c9d38c6. 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/CA6D21900266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d67cb5d2cd83108103f40cb3583f126cc429f7654d264811aea5bae0e6ce0c9. 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/CA6D21900348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9e13028fa191eb162db1d5ce4ce8b8afb02340aa3256819c2b71ab7c9d38c6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA6D21900266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456524759a39897d1172e2db36ab6925ea973f1792450aaeb0fceac288012e23. 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/CA6D21700057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456524759a39897d1172e2db36ab6925ea973f1792450aaeb0fceac288012e23. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CA6D21700057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291c585c2d7503ad1975e41685e0583ae9db365b40ebfd4d190ce6fd5be5103b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZS632437997.