Sissi or Sisi may refer to: People Empress Elisabeth of Austria (1837–1898), known as "Sisi" or "Sissi"; spouse of Franz Joseph I of Austria Works about Sissi Sissi film trilogy with Romy Schnei
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 0xe628d693dc18ebb9e60a0103f9153c32903186c1590beff99010d76f28014ab4. 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/4766a4a3-6990-4a8d-a35f-51dcec2bb4aa.json and https://artists.proofprofile.net/proofs/artist/4766a4a3-6990-4a8d-a35f-51dcec2bb4aa.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 0xf5ddf374c297e258f3a851f56ccdec9c6b604386a9d0ac93c7769037557f8c12. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ITZ042000059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb848f8f8d1527b9dbd6b45ea7923c708a22effbd5f24d4aef2a94c65a152715. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/ITZ042000075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a41b6f8363b047add6ddc0c88f7986305f190a1bf26d10974f7768687b0bdc6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ITZ042200121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef4f62f6cfe8304e5db9faf7fcaa7d1faf0e889e7bc6a6b18571e80146bb0f2. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/ITZ042200122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a15bb27dc609fe57ae29e82f700e6d0dea634e58c5d7b4a9771dd34f89c65a. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/ITZ042200125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec3b00d71463eee334acb7ccaf25c4dd5c9f7a56133edec30b81d701addd016. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ITZ042200126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b879522c28b50aba8546593a6c2021193a814dbe1b4706abafa16bf977f149c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ITRWL2500028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c29ff58489a2f84ef80b2a82b49cb58da6b3a391998bfc7a03b0de1f486559a. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/ITRWL2500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d8881f575db852c1b035c69d61c3e760b04b8f4a7a0698d0d904baed34c6af. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ITRWL2500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988963c57f1c97bd959f9bf323d79c5461c7f0e20c0f62c38fe7681cb7fdf942. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/ITRWL2500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555a47edcedeac69edc6d7eb9b88419e77fea6547da214546604797e1ef330da. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/ITRWL2500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143fa4a13b88c549082c0213410ab75862328bcafdb4e6364c646a3d691afa16. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T05:07:11Z), 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/ITRWL2500051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01c382ea6e1c1141d7a31e42a892e7ef474deeeed8996b25af56381608aaf70. 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/NLRD52017996.
Fa strano (Lady Marmalade) (feat. Gaia, Sissi & LA NIÑA)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec64ddc025c573453d72b94c0992e51de5e805f26ed506c37f7d9d1823576ac9. 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/ITRWL2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec64ddc025c573453d72b94c0992e51de5e805f26ed506c37f7d9d1823576ac9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ITRWL2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bda1626cef9f8dc36cb3f7be36fcc4136e97d47a8738683077dc1d38818692b. 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/ITO952300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bda1626cef9f8dc36cb3f7be36fcc4136e97d47a8738683077dc1d38818692b. 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/ITO952300007.