Roi or ROI may refer to: Music "Roi" (song), by Bilal Hassani, 2019 "Roi", a song by The Breeders from the 1993 album Last Splash "ROI", a single by VIDEOCLUB, 2018 People Alice Roi (born 1975
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 0x7ed86c48b5f088e59e17a1252b4453ca85cf94c7eae168544d4d85111cba87d2. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/61ad6da7-e339-4987-944c-11b08ae53a80.json and https://artists.proofprofile.net/proofs/artist/61ad6da7-e339-4987-944c-11b08ae53a80.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 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 0x17c2200db5a34ae4a80eaa954c579e638260516a527ba0ed49c5fd129aebe8a5. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/NLZ7B2300411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7170fd8fcaf40bcab64ccae8325ed9df4f359d8f485954e4e3c999432e4e59ad. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/NLZ7B2100203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeaf9b4343e4f99950d9e13ce3b6014cd4cdb12be17794e73e5ace9a37d33813. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/NLZ7B2200226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976adfe630df31471de8943963c1ab3bba9629bb1ac61086dd79f64b7358a58c. 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/QZPLR2101917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b8e3420754e9d02aba9c710dfc569a060a36957f7d01db34d1eb613bc33c66. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZPLR2101919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09e282b3faec86b1d7226bf47f796fc5a713c1445259a8a434010467fb5eb86. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZPLR2101920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f40f1519a25aa28a176ea18830fee5e1b51b3066c0bb3078b44b16f7356f121. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZMEM2164899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cad713e117cf7acf7449be3f4ca610b8868f8e1184fa5d6c2db386ccf56c101. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZMEM2164900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b3bf5cd54796bdd4923030b23bb16c545f2ce7b8629a8f6988b2bfcc98e730. 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/QZMEM2164901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4494946c5c06d8ba9c9f53eb1f1171366bdb9c1ed4d182702368e61b85b71cc8. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZMEM2164903.
WELKOM IN DE TRAPHUIS VOL 2. ECHTE TRAP SHIT
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1599d02737e7bb634d3075616690e2f62833e74b0115430d5df4b29f8299d17. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZHN32164022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723da3bedc85e172ee236c28895005e9018a9646fbfb819f836fc2deace72a15. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZK6Q2592262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1529a5c362efb8273f417c660ff0d2edde685f25cad0245bc9ac6e4b5d9456b4. 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/QZK6Q2592263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb87dcfb8b7bea34bd8ed558c13a2b5356809f130832bb522504672b805b556. 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/QZK6Q2592264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0342f4507102faf57ecdd445102309f29a231f874b6d72b68a4e790d1357ab62. 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/QZK6Q2592266.