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 0x801757a3e571989cbfaf6716d110ec3a861b5f3a60461f7214615336bacf1778. 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/9a917a08-fb40-46c1-bed4-dddde653bec4.json and https://artists.proofprofile.net/proofs/artist/9a917a08-fb40-46c1-bed4-dddde653bec4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Dj Hüseyin & Dj Emirhan - Illusion (Club Mix)
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 0x8159198307c3ec54380c1b7fbe05d183dab48d99c5371e6dc099f9e5b68769c6. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZES82131690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9a46d7705730af0cef4af6d4ee81f749d1849c90b6fc3dc41ed0856348c58c. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QZHN62158804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf10ce8683c7281abf9442df7da894210798ff87da75bdfead967400afc6c368. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZPLS2143305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a6a685d1ef46572887a121abab5e56bbe53498f46a84b9e1ea1eec4ed29b58. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZHN92181329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44e9ebd544a571c065a43aef6f9f2a2c3219dd55fe5d175ed14e9a80dbce6c3. 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/QZPLS2143022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5224c6cf9d53655c513fd7018b76ff82166f2b4b89c5c483f936ba88c40ef212. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZMEP2144114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3bfbea509393b4318c57c44afcc87bc2924fd9678fd2a05a080aa96dc34319. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZPLS2171683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292672183c70af6c3f5c02a6e343f0ec9ecf3c844383d9a4c7157ce1a041951a. 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/QZDA62200578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905dbaa240cac3df260508f51ee708d080866e825ed8af55c275dd0c552edfc0. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/QZHNA2213361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b66661ec3560d1029ecc076092147f80e20fed81b6e62305bb5466541ec9b8. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZNWU2267298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9349bf6b20038cedbaddbcfd49c4d277f61a2d62364463ca1cd401bace3a2695. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZRP52290520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff6e9a7640ce65b9ebd18866d65f49bf48e4367579118636bd83f45e42481f4. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZDA42320817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6422cf528125c50c96353b561ffe14a6a6830329304bee7a5087b4993c281276. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTAT2361360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc145304634030a0e7a71588fc188b3a7d9f47f09d99c004cd376a03b47afed36. 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/QZFYZ2449300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c8eeee2e23e2b9a4255a787d55518889bc185cd26c2fd16dfd5818d80c0680. 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/QT3EY2506833.