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 0xab85b73cb735a811f19daeb33a330943652e0a6b66cd52b33795014d571ec201. 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/e39aa923-281a-4803-ace2-76f67b61e4ae.json and https://artists.proofprofile.net/proofs/artist/e39aa923-281a-4803-ace2-76f67b61e4ae.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 0x3263bf79d5944d473ce5c3b912e8edb49209d2497796368036332d21a2bc6be4. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USKC61923209.
Atli Heimir Sveinsson – The Complete String Quartets
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f57a3e88abcd657f751b7308080c141f2a3e069170c0b7993a613f1cb6bb563. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEN962030802.
Útdautt lag (feat. Magnús Jóhann, Siggi String Quartet)
あなたの骨が、オパールにかわる頃
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dead9b57840c716e47583956787b121bcc0ea4ce0492178623571c8779b3043. 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/JPZ922308879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269e58755756782ec06feb406f2db265a7b352afd78639d0822b53053e9daead. 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/DEN962030814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076cb0a22082d9e333a0c0be4c0f2958f423438864ce00a390b3449d71c5d945. 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/DEN962030812.
胎盤 (feat. Salyu, Magnús Jóhann, Siggi String Quartet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d793414701485a7bcd79c4cdce802df7c10cd1cab7f2509ff916bd55265f17c. 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/JPZ922306266.
あなたの骨が、オパールにかわる頃 (feat. Siggi String Quartet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597b14d5464e813b75fdda248ad28ca50ce9e0e8e6f59ebefc9301a20f1b97dd. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/JPZ922302936.
残照 (feat. Magnús Jóhann, Siggi String Quartet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef09c57d18b7769ca53c9983e3ed50aaf762c1a6e197b6b485418d2178c81c9. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/JPPC02312063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f57a3e88abcd657f751b7308080c141f2a3e069170c0b7993a613f1cb6bb563. 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/DEN962030802.
Glassworks: Opening - Reworked By Christian Badzura
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23bc005621f63d27efeca4450605fdf74eb290490cc21a0f1ece65edfadbb2b9. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961631313.
Études: No. 2 - Reworked By Christian Badzura
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e9d4ac26ec4ac21f332d315a6b4296c197efff136012dd6db4002d3a33ec66. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961631307.
Études: No. 5 - Reworked By Christian Badzura
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1bea7677a3a8c1cbbda79ed34874631a5b7b3c1e65335849b1998574acc78cd. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961631314.