Koss, KOSS, or in German Koß can refer to: Places Koss, Michigan, US Koss River, South Sudan People with the surname Christian Koss (born 1998), American baseball player Eugenia Koss (1806–1849),
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 0xe1095a0afee7835cb06e4b63e727fd835dbeead4fae12f8c893d128cd12a0954. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28d44062-c238-452b-a635-85dbd6fa8a4d.json and https://artists.proofprofile.net/proofs/artist/28d44062-c238-452b-a635-85dbd6fa8a4d.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 0xd4eab4369da21c3bb49013fe06cf03029a1fadf4baafeb40156979cc96165aa5. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QZNWS2249584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2407ed61d38e01869adb9207f6959f0830966c2b601cb2d0dbce6fe7a364bcbb. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZFZ22316093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeaf7a18df46128b2d981d3652b596d85b82e6f36b84c4a93c35bd306397a9eb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZDA52371761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c946f313e3dd23783913aed5fcd53f6b729c30132fd3e7558cfbd1c8355d48c. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZDA52371762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134590e19e31812e2db2dbdff129ac3ddd536f7305abae1c0525e9e9c904e36a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZMEQ2451002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86fd8aa55f91fdf184fc3ff40b19dbff68ad947590e88bae6285aa38f1d78359. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZK6M2400246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ba436f1bdd3cb0dc805cdd5e8aec3be75ec3f3cea3becc95f9495ccea68fa7. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNWQ2449025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65703ed939e0f6753430a78b16d396876d59e69924377449c378148c8fb85db9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-20T00:09:18Z), 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/QZNWT2576710.