Graciela Susana Ambrosio (22 January 1953 – 19 November 2024), known as simply Graciela Susana (), was an Argentinian tango singer who achieved success in Japan in the 1970s. Life and career Gracie
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 0x69af5c324281cba1965bae5938a7a80011cf7a39e2e441368ddaed33c55e6c71. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/13c6ab7c-9237-44ec-a0d6-9783529b1d70.json and https://artists.proofprofile.net/proofs/artist/13c6ab7c-9237-44ec-a0d6-9783529b1d70.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
ＣＤベスト・シリーズ グラシェラ・スサーナ・ＣＤベスト
フォルクローレ／グラシェラ・スサーナ、ユパンキを歌う
カニミート／グラシェラ・スサーナ アルゼンチン・タンゴを歌う
GOLDEN☆BEST グラシェラ・スサーナ～アルゼンチンの歌姫
GOLDEN☆BEST グラシェラ・スサーナ〜アルゼンチンの歌姫
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 0xf8df4fb868c8c427404f48912e405fc50428046ddbe9244d5efa41a032d83f6c. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:31:54Z), 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/JPSR09181949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65357af40ce57d727762ae8d53dc9ed7e7f9f7bac0812c2544a4e8d4a556a05f. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/JPSR09110230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a5b69464b5ecf1ba646ba4add3d3d5b8a63d93091a7b88f23d91a08d52f20b. 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/ARF220602773.