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 0xda6e92d99f8ba40eff709c036733589bda922af9d9adaa173dc71fb41534fd47. 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/41351f16-dfdd-47df-8abb-65a6eb7b98ec.json and https://artists.proofprofile.net/proofs/artist/41351f16-dfdd-47df-8abb-65a6eb7b98ec.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Botanical Garden / Foliage Estate: Mountain Overlook (Yume 2kki)
Verdant Promenade: Antiquated Resthouse / Rusty Urban Complex: Operator Cyborg (Yume 2kki)
Decrepit Dwellings: Bathing Mermaid (Yume 2kki Version)
Chainlink Lees: Mechanical Heart Act (Yume 2kki Version)
Graffiti Corridor / Foliage Estate / Shield Owl World: Purple Pillars (Yume 2kki)
Forest Carnival: Lower Level (Yume 2kki)
Decrepit Dwellings: View of The Beachside City (Yume 2kki)
Tomb of Velleities: Lunar Sanctuary (Yume 2kki)
Grass World: Pupula-Toru's Room (Yume 2kki)
Fairy Tale Woods: Apple House (Yume 2kki)
Decrepit Dwellings: Lower Area (Yume 2kki)
Flying Fish World: Helmet Girl's Apartment (Yume 2kki)
Yume 2kki (Original Game Soundtrack), Pt. 1
Yume 2kki (Original Game Soundtrack), Pt. 2
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 0xcf05cc45a827dd90da780d28c99f2201e682a8589a399adb677ca3443e2115cf. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/TCAIM2466531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2541a8b6d06d35fff549513472944ccf5458ead3cebe32cc5e0aea37563162f5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAIM2406833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aebba9e53227ab23b32002e2731040f3f65b72f537836c085990b36eca26ae0. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/TCAIN2406912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1661027432ede28a44489fe45995139517cafb0d75367d5ceb4edcf5517c518d. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/TCAIM2412353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e1566002c2fb522a9b1e7dee34c615e6a0a91e2a72c480dacecf2a3ecd8d5d. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/TCAIN2407045.
Forlorn Beach House: Shadow Friend's Company
Sunset Savannah: Between Reality and Imagination
Sunset Savannah: A Gift from the Universe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8358734ff368ed8d987d28e5df6edeae6861048a0014521d250e874359d1b3c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAIM2440232.