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 0xc00dea24f99354fb48bd09e8d5615c3a6516673b7fc954e0457673c015f2c41c. 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/158b6606-402b-4fa4-965a-e29b12a126c6.json and https://artists.proofprofile.net/proofs/artist/158b6606-402b-4fa4-965a-e29b12a126c6.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Fire Giant - Lofi (From "Elden Ring") - 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 0x46938d58e0977cee8182cc191d11f2c7adf60c7ca5bfee10155013c18e14da22. 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/QZPJ32374474 — a six-check JSON result.
PM Rockin' - Music from the Mother Series
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733c78db7252b9ac16f1c488330044d59ad8e53d13ecbb3032d747cc4e1848ec. 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/QZPJ32390691 — a six-check JSON result.
Astral Observatory (from "The Legend of Zelda: Majora's Mask") - Lo-fi Edit
Astral Observatory (from "The Legend of Zelda: Majora's Mask") [Lo-fi Edit]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0aa47238ced450a339a0e4efe5099470c2c8c96b4f313c76fe7e1a142b7e14. 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/QZPJ32355452 — a six-check JSON result.
Moo Moo Meadows - Lofi Violin (From "Mario Kart Wii") - Cover
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0107c176c0e61a35df193a1901f4e0fe5a4b86708c3e90d32a1771c2f08bac3c. 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/QZPJ32358886 — a six-check JSON result.
Cherrygrove City (Lo-Fi music from "Pokémon Gold and Silver")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f64dfe67847178148f18f3dd57eecda7fa6c3202cc9239385566e2ea86a08e0. 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/QZPJ32326460 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7e291d320d5934aadd58b17c4575ba517c1b0982a1a767ceb00c7c8779b7b1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZPJ32315408 — a six-check JSON result.
Objection! 2001 (Lo-Fi music from "Phoenix Wright: Ace Attorney")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff44a2bf36c5ebc21c82b25df32170cbc55d209b18ba35493a82199635487be. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZPJ32315407 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731f235159088194b1d31600ec90b7f3be6fd176f9653ac2fa245b0d9751159f. 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/QMANG2227491 — a six-check JSON result.
Route 26 / 27 (From "Pokémon Gold and Silver") - Piano & Violin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac0ec34384e24367e4484f5e4415e6d6dc82784fa4bfe12798a84909a48172d. 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/QZPJ32354254 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee8c00d3612993f536e5ba5f2b15515b391c0f96574ec458ab7b87b9e6af95c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US3DF2464278 — a six-check JSON result.
Route 26 / 27 (From "Pokémon Gold and Silver") [Piano & Violin]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac0ec34384e24367e4484f5e4415e6d6dc82784fa4bfe12798a84909a48172d. 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/QZPJ32354254 — a six-check JSON result.
Kaepora Gaebora (From "Ocarina of Time") - Piano & Violin
Kaepora Gaebora (From "Ocarina of Time") [Piano & Violin]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3046f54452ee22a648d5c288f4b9c746b3739149e4af9689b65c72bc3e65b21b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZPJ32322939 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ae266e204dc50be3efb7d1910bef844be229fc91b0b59f6d7b3161763106d6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32331972 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f82ff3d3ac7f0b27617296501227672b5cb219837cd2cc8a5a9fe3fd5103e79. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32331973 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde1658b3715dfb082e82059fa256b7ca272583711645ff2a33dc3f16c8c7091. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32331990 — a six-check JSON result.