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 0x4b8569b0236b9e358748a19995e6eef84ead2a29c62f2516956dae6a0979f95f. 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/ab8aae90-4ff3-46d4-a60b-a194c493a8e6.json and https://artists.proofprofile.net/proofs/artist/ab8aae90-4ff3-46d4-a60b-a194c493a8e6.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Fist Bump - Lofi (From "Sonic Forces") - Cover
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 0xa6ff8e0fbac22f468e86d30b531b7a4da96ac2a43ecbe3b021a46dc932c04f05. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32345797 — a six-check JSON result.
Planet Wisp Act 1 - Lofi (From "Sonic Colors") - Cover
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ef88fa0f32e0edb76608d383bca3956afdb104d401639a59d0917e27397401. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32345798 — a six-check JSON result.
Spring Yard Zone - Lofi (From "Sonic the Hedgehog") - Cover
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1357243f34587408b2443d2d4fc4d0436638f8fdad9579b8df0d1332dcd711. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32345799 — a six-check JSON result.
Aquarium Park Area - Lofi (From "Sonic Colors") - Cover
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11037cf9ac65a43890d5c9e4a222f342225d1ab0c1dc0305842f6998e68386fb. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32345800 — a six-check JSON result.
Neo Green Hill Zone Act 1 - Lofi (From "Sonic Advance") - Cover
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588ac9f139e5b514ffef069a8e0b103aaf67fbf7e12bf2979d9debaf9619dcad. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32345801 — a six-check JSON result.
Marble Zone - Lofi ( From "Sonic the Hedgehog") - Cover
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18debf74380b6bccfaff6ce4cdf24db30ef44098746fbeee2c48e7e820f9f0d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32345802 — a six-check JSON result.
Neutral Chao Garden - Lofi (From "Sonic Adventure 2") - Cover
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9eb0c925363c17c480a350bad6010b09b76a90940926bcc5465930c54925ff. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32345803 — a six-check JSON result.
Meteor Herd - Lofi (From "Sonic Adventure 2") - Cover
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d590eeb02e4708457f7e7ae99879a9026e026ccf7abee6c83ada822d11d586c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32345804 — a six-check JSON result.
Don't Speak (From "Tragic Kingdom") - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6f0e42348c0812bf5bfdb709ad80660bc1e955bf92e58a7b569d74a373ecfc. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32282511 — a six-check JSON result.
You've Got a Friend in Me (From "Toy Story") - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58dc75ec0b749401f3217b5b568f83d0451868455cebf01d6aaeda7a59fdbc97. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32282512 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5748ce9071e6bd31123d8458b23aba4953234f6b7876b844b94f38aa07f4bee8. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32282513 — a six-check JSON result.
Green Hill Zone (From "Sonic the Hedgehog") - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9412511de2c8900828a8a67b9a01ef6b9eb2edf1246e80dcacf65485ffb69460. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32282514 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f299916eb3e549947e67efa95588d68b119841c37c3551561b389571f29e1d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32282515 — a six-check JSON result.
Heart-Shaped Box (From "In Utero") - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c37553173687695ed4fb536a20fd8b5d2160feda3b20cfd38beeb76f41d778. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32282516 — a six-check JSON result.
Main Theme (From "Looney Tunes") - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153f27e33b1481234400ce3ec7affcf825ce4ba204f5da152792dbb7a2d49c09. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32282517 — a six-check JSON result.
Join Me in Death (From "Razorblade Romance") - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a057677cdeae177b58b68da86ec48ac311e74f50ab51c18618ca1e1c02c27b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32282518 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98977fb8f311f4fa5de0fef1b631d80c306a7344093b91dc4dd0fe20922f6ca2. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32282519 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6071e7c127719756da4415640bd480ffb965e1fcee63ee5c3bc6604f51104ea7. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32282520 — a six-check JSON result.
Koopa Troopa Beach (From "Mario Kart 64") - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e2a619fe668c01cb510d40879bb98f98a03d3766b4ae4ddcc3de720ba01447. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32282521 — a six-check JSON result.
Main Theme (From "The Simpsons") - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a86b514cfc524e0eb273abbf8348b5a793e872144041b52287a8c67988cd7ce. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32282522 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab33f35042c586cb819657cb8cfd897bdca5624194ab3afba033b1475dcfef2d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32282523 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f852134161d361867643d67b29e9c472eb7c41ee755aa17fe147f3e15da3c8. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32282524 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb64c66a38c3351b937a9810db312c26f5a962f3df070d0610565a8b3931101. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32282525 — a six-check JSON result.
Main Theme (From "Crash Bandicoot 3: Warped") - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3926e6f539535d7985c5cb16de75fd27f9290c4b908d7f343114911da93e5c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32282526 — a six-check JSON result.
Gerudo Valley (From "The Legend of Zelda: Ocarina of Time") - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0df3a49da387521d641e65727e8a85cab406f0582d68ac02c47b42fd06465cb. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32282527 — a six-check JSON result.
Theme Song - Lofi (From "Rugrats") - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31190b915de18bfdb5872fee682c7fd6829a3495eb251aa387e946633fd52c7. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32255818 — a six-check JSON result.
Theme Song - Lofi (From "Rocket Power") - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c537e954cc0c36af73f0211cb2b760a19af402a69026990ff9db375035f27c3. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32255819 — a six-check JSON result.