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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e064832e49c2a5175dd71f0c1e559f07b04a9a06b658a9d3f033532b95d6a5. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af3bbffa-76f5-4f92-b9ab-6d806ae004d4.json and https://artists.proofprofile.net/proofs/artist/af3bbffa-76f5-4f92-b9ab-6d806ae004d4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Le meilleur du folklore Suisse, Vol. 4 (Die Beschti schwyzer Folklore - The Best of Swiss Folklore / Jodel, Alphorn, Akkordeon, Chör, Walzer, Marsch...)
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e63294c2c48d8f26a1ece78f9aa4e102ce69766b14b755f93fbc0d80e544bc2. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/FR6V80181452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de7524a13f126bc68d6ab84dd07a97910681980f5e8dd52bf4a082b9785102f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR6V80181455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaffb5fcc6503fa06d8cc7b861c984d0a67b7ca674903aed17c676be4b06fd301. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR6V80181457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450ed2327e61771f727b55075c7b948bf08da0e6aaec5f3f51a3c3919f1aab7d. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/FR6V80181464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60efd0f04225eeb81319c6bafaf4b62a71da578e780fe6ddf016f94c54947fbb. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:54:51Z), 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/FR6V80181467.