thumb|right|200px|Tysta Mari café location in Tegelbacken in 1950 before its demolition Tysta Mari was a famous coffee shop and restaurant in Stockholm, Sweden, known to be popular with artists, inte
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 0xddb950624d092b34241711b7c5d4ed1d387a3bae06efef1b6e3086b308da2a66. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8a521d5f-fcb1-452d-bdfe-ea0b27b109e2.json and https://artists.proofprofile.net/proofs/artist/8a521d5f-fcb1-452d-bdfe-ea0b27b109e2.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd873a197d1a89fcc1add7fb3095d5416ba6a01c60e8a834be61561232f975f5. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/SEXCH0900501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10b151e42b9fa139543119a79920a20628194a94e98b87e38924ab0ee59ec79. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/SE3VF1300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb797ce01ca801b82f4a2cd10e841af273356264d9002dbd02cf6b6c7700ae224. 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/SE3VF1300102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a1a1b78f88ed235dbc3c453966ea40427f0b4c439b8ec42319e466e8a22868. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SE3VF1300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c691f652aa11aa202dc9d5ee10c2b9a850c2bb73ec93994214d4b70ab3497e9. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/SE3VF1300105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103dce42dae72a25a3be8d5268ddccae33c72f65eb7cecc5ff8ec7bd5676d771. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SE3VF1300107.