Xixi may refer to: People Xi Xi (西西; born 1938), Chinese novelist and poet Places Towns Xixi, Huilai County (溪西镇), town in Guangdong Xixi, Yongkang, Zhejiang (西溪镇), town Xixi, Luxi (洗溪镇), a town o
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 0xe83c9561c16f2b4265dbe5c1132abed648cd29047ec9bf1dc97c6b5c8f457cf5. 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/e0f9906d-bd05-47a2-a871-36cb8d995c15.json and https://artists.proofprofile.net/proofs/artist/e0f9906d-bd05-47a2-a871-36cb8d995c15.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 0x4dde8895a42b5fb5e45e4dda0de7b80563a26d8fa0417710ca86f8247a364813. 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/FR9W12430105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd3158b14c22d27391fca4a88ed1a3ed7e1af08e8bb875ce7dd422212cb1833. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR9W12430103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea96dafdfa8cb0c35f356d919d1adc68e8952738e9800a2d4b7476480753078. 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/FR9W12430106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62568b9ab44565f3ba4840f29cbbd14972f90f475014b9d7effacad87ce6fa04. 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/FR9W12430108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a02ed76887d49eb6230681449ed436d0d2cb395abde731350c0c68f0699984e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR9W12430110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a14dcfd2d1b442a216309f195b578dacbee87d8e9e0d98f5ad581a8ace6c711. 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/FR9W12430112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd31c19788df9913d0e04a8d42088bdd2a9cae4a15fdbe88eb3acc5b1fabd84. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR9W12430113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd31c19788df9913d0e04a8d42088bdd2a9cae4a15fdbe88eb3acc5b1fabd84. 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/FR9W12430113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd3158b14c22d27391fca4a88ed1a3ed7e1af08e8bb875ce7dd422212cb1833. 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/FR9W12430103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803458a8bcf4a4dd3d6701c97dd5f073894a3a3e548d34578bfd52119585309c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR9W12443574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a02ed76887d49eb6230681449ed436d0d2cb395abde731350c0c68f0699984e. 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/FR9W12430110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce35ea087dac3480b79b3bcdfd154757e4b77f6120a556cc88e37d7dff3e2f7. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/FR9W12417004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbcea89206edfed3399705c414ed258aac85e711a6b8b289dcd1fde42602dba. 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/FR9W12417005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835e0591a09910ddc708d9710f2814d62dd772fd781290dc7151fc32058a705d. 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/FR9W12405142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b527dadfba9c5a4b7857782929e72d261f5bb8cb145c1be14b6abebc107fb7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR9W12337799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336cd7037598cba2f9f5e96b52b48b40ff5263bec9a4bb4c6a5065fe463aef9b. 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/FR9W12337796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18864464e280af27bdda158404b3d4a35f1eadebf362107495a53d05a39cefe4. 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/FR9W12337797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21340417b76809acaddb320fa324557ef544e55961f635dc59f5778ed3eb2af. 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/FR9W12337798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2db17b020fe4b9b124171353ef2c30aadcd80197486663f19db10746db11a2. 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/FR9W12335850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee292a33be68ffcc9d5be0fcedf08ddd255f1231ca6115502ba2ac9d0b39ea5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR9W12325041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832de405a5a52c1e45f11f1340d89b130b3a5959d80a7a99b4eb92439b27e090. 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/FR9W12307939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6ec3a4b099b15270ca4fde77afa86077351d786f60f21be6406237f151b736. 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/FR9W12301895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49afa21823f8467fefd2465c0809b719882729f87c02f571c9beb3c6d845eaf1. 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/FR6F32203180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42608bdd0e705a594fc04b0ec9d3eca4b6866d36c5e59de04a13453ca082b0dc. 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/FR6F32202000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae4b584b785c909e71361c62d182324ab2e6355112937d2ce938832d0530222. 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/FR6F32201530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88088e3e716aeb9412f3fdc6a228b1fdd4995439a81cbc49c5058a1733c4e2ba. 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/FR6F32102680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47197b919f52f332209056735f9b0a909d1da771ef052acda582d2fcebb9c048. 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/FRX282064612.