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 0x64e8abd245c1cd03daf66dfc3cd308a1d8e9371360265beb4db1f1156c52c759. 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/d0856ab8-ac54-4a1e-8a4d-daa8f7e113d5.json and https://artists.proofprofile.net/proofs/artist/d0856ab8-ac54-4a1e-8a4d-daa8f7e113d5.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 0x0a6cab30ee43a41d988ae678cbad6ae586e62c878f2e05e8a5a86076ec7c8362. 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/TCAIB2447848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc278d6c84eb444d0d802e4cf7fb0900f7ac366d104bd2ec25fd26bc6311ca8. 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/TCAID2463657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1370af194ca94334eb154e068a12110c4841ff836e1d045b357373f223d8a414. 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/TCAIG2412905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6230d5773e2b4ec4eb4563023ac1f68d39e61e1c203f3ae7d1482997f30dadfc. 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/TCAIJ2450499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8463fb89fa0e2fcfcf4e589a5f9f30f77939359565d8abdf119342ccecbb3d14. 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/TCAIJ2450504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1370af194ca94334eb154e068a12110c4841ff836e1d045b357373f223d8a414. 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/TCAIG2412905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc278d6c84eb444d0d802e4cf7fb0900f7ac366d104bd2ec25fd26bc6311ca8. 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/TCAID2463657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c716ee83767414d2671547c750874f26b38855fdeda219799d6b6ba8d8ffc29. 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/TCAHP2368573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b330413eafdec11b2d307f44a2d361b424d34208c6486e1be3babba6ba63857. 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/TCAHE2318032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb90cc6dbd00fdf977f515a734d3b82756dfc151ecf9156ee87c942f49c0d0c. 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/TCAHH2377192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1804b82c099b34db1054bf680a34fb638d180c3c913d81670e6ee6e8af609249. 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/TCAHJ2387923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd1639e904377e1d9909ddcc12007af0df85fd279ccef294a40ed2daa608482. 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/TCAHL2388425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9d75c3c686e4b56c0fbef04f3597f193dc8a6b638a726dec42d3482325da87. 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/TCAHL2388596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1804b82c099b34db1054bf680a34fb638d180c3c913d81670e6ee6e8af609249. 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/TCAHJ2387923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb90cc6dbd00fdf977f515a734d3b82756dfc151ecf9156ee87c942f49c0d0c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAHH2377192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b330413eafdec11b2d307f44a2d361b424d34208c6486e1be3babba6ba63857. 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/TCAHE2318032.