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 0x431ab998c37e597c20cb899fb7e9d0f3fa644bd7131edfdd19080ee4856b0041. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1926176f-9a71-493c-96d6-83a1996cd1ce.json and https://artists.proofprofile.net/proofs/artist/1926176f-9a71-493c-96d6-83a1996cd1ce.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 0x092793a59be6947d72351b213e92bb30636b1cbef8aad9ea7e5768a60b2b9d89. 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/TWA219914101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c7ede70fb0eac0e00eac568350fc0399504d562eda200924ac6891b2282d1d. 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/TWA450065301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc884c13fe747663d6a214d1af770af18c287ec2e45b16e5fb53b0de6f782a464. 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/TWA530503501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5b3a6b231baa2066c220b7d35b161f00c5c5f190d3a67a1588ae5df888c084. 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/TWB870109302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb717267a934941b6f159ae440f66959ea94bd841a59b6494b5ef19a67447b12. 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/MYSW10890283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ace0a0d02e37e17ad40f699d7fd63698209f920020f75b93c41166ffea0908. 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/TWA459400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19ba352c3b0961e3c9920cd05731a7b086bf2b3a9c34c9ba6f154241064b8a6. 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/TWDK59107022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58bebeac0eaae13c9cbbd74112d08e9206c35ef2ea74756d8731e7ba954f195. 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/TWDK58907021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13baf63cc3f1136a0dc12e24e1b5f12403da4427c752c1fad67b4b7364645d40. 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/TWDK58807022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd987a122da5b6267cb478965405f39f1227e1f005443d2994b30b77957093cdb. 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/TWA470307001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329196cc742cf2f343376309726c67587a912ce34c2021d8e81055c4436ed457. 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/TWA470307020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa2f0c55d7c0c060203c71cfc800397b92aa51c4940ba52b595016fb1f4e401. 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/TWDK58807011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d5f23f901462553608948dc600e4b76a2449e104968876708ee0393050873a. 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/HKC842000098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe567962190adb500bf4cc89ae44303b396ab11dac53fcb4aa732c4bad73ff425. 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/TWDK58907006.