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 0x70b7fc850906cecc3fa931ffdf8cbd407a7b2a5616d1164bb7fa943cfd88cf1c. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4c373cd-6658-41a6-9241-f3637fb27011.json and https://artists.proofprofile.net/proofs/artist/e4c373cd-6658-41a6-9241-f3637fb27011.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 0xdcef34239d87a49c3512522bec5484199cbc0d641fd3e1359283f9d559ce45e5. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/FISRK1800056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bfa795b3a3041fd8a2b8cacef6ca085608e55a7159c6f20dcaad7b246c90b07. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FISRK1800062.
Tontun puuhat (Tonttupa öin alla lattian)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af7d78a71bd80a4c81c8cd0f6ffca8a7efe38416c77dd84bfeea022eaafbdd7. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FISRK1800065.
Tonttuarmeija (Tervepä teille, tervepä meille)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4637a319fa394c5064a04943bf41b53d27fb3fda4ba6c22b55184c069c041eac. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FISRK1800068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf124946939c8f8fae34cbdfa5b59541b8062e94e05cd17582e4b6445e0d99028. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/FISRK1800069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c5496c8b76081ca6a08199263a02968047a92cdd99b160f898c28f07285ad3. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FISRK1800070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a3463fa117f4e199d3b9b49820217660a28fc62ea99e3c18830a5e60c00548. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FISRK1800071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952077e21e33d0741496a02a9e7a4fbbdc415b9ba7834bf3077c170797d966b7. 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/FISRK1800072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08da74ef78b9d5b509bfc494ef9546c6d8187336d8b017f17a086a30708bd5f. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FISRK1800074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d0d4c37057bf00039ee905e9f7e8ed1abd241a2a6290ab448ea26c78ded8af. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FISRK1800079.