thumb|A street in Oğuz thumb|An aerial view of the Lakalaiva interchange in the Tampere Ring Road between the Highway 3 (E12) and Highway 9 (E63) near city of Tampere A highway in the broadest sense
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 0x35593435812aba64e797d3a3cba9b6a0df48ea4c6b24f3d6b73fd96fa4a1edcc. 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/2b51ca1c-ce9d-4c21-88cc-01c0801448e2.json and https://artists.proofprofile.net/proofs/artist/2b51ca1c-ce9d-4c21-88cc-01c0801448e2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kiddy Kiddy Kiss Me (2023 Remastered Remix)
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 0x2d78a366821e24433b9e6b5d5be3840f1fabfde503720f27d845b7564f61a2b4. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/NLA241700348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4d2684af62d0a634f62ee06075c6ff964afa998c9179e2851f91ef34a7eb2d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/NLA241700349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678823eaffe914ceeea4b0a7113feabff1ef3aeece0b07ed0eb5185e81fcd90e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NLA241700354.
Sugar Sugar Baby (2023 Remastered Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dea60f566892b8fb4e0bea279b695a218dd9a1ad85e47841d69e0ba4f582205. 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/NLA639800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3963f941d7947413f83cfb5cab98d4e0d52dcd19420d859919aadf38aa9233c. Chain 2 (Bitcoin): anchored in block 957611 (2026-07-11T21:33:50Z), 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/NLA639800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2982fcd722286d9c25530cd92a6e988308f87b05fa22c72c59fc6b843612e311. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/NLA639800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78eea580995db8d4332710a5d83ffa9c54e20d5be37d1b859bc7319143a4527. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/NLA639800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d907dc0df54a43c206e79ba162e1e82148ad62ccd71e11052f7ae5132fd766. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/NLW2R1822861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3fb6c56b1ddd6ebe15d622f4454d8e96392fa511893405a37b220c972a998ea. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/NLW2R1822863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048666b53e6f3eb4b7a74997bbe8b659a2d5bfb54bc0cd315810b22112210bd7. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/NLW2R1822867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15345f2eb5d6b0ef448b67648ed68ab048eecde87a1d267449770fd08d520ea4. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/NLW2R1822872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3ed2459596e8d1e586181cfa7864636e8909f8f066d73da04ae5a855aa6dce. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/NLW2R1823688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d8f5f877013489b97b2b1f1d2faab27ea21d47bf4f2f73600d1bfbf3f8b176. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/NLW2R1825093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976cb88a16e175df91ef93058cc21cce1a66363905f39344384e89956151e248. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/NLA638383011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237b44efd3dd675e2f8f358fd83d365b74bf2d5027c63c9068bb7ce895145e79. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NLA241700346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21560e65d754f6355e83caab3437e8f008542acb0d8b1ab0227bd15674cee953. 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/NLA241800238.