Sister2Sister or S2S are an Australian music duo comprising the Muscat sisters, Christine and Sharon, who are pop singers, songwriters and television presenters. Their debut album, One (June 2000), pe
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 0xc2ac6da6fe94a57a3e59d5ba9eee730d0647d2b387ce1b6f9192feca2e643a8a. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7fe2699-f9a9-42f3-a2d3-746e482dea5f.json and https://artists.proofprofile.net/proofs/artist/e7fe2699-f9a9-42f3-a2d3-746e482dea5f.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 0x61a4cdbd2e7568fedd14faa32d7123e4d9d8df7db3cf53c5fc3bf3c1d1b47815. 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/GBBUF0000701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754fe80bde4f844f3253acc643651e886899618c39decfc33bf38b3adf4094ea. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GBBUF0000761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d31f8cdbda58d3d1a2728a76a9dbfa9c4b72a996a67d9d898d358cec022345. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/AUBEC2341680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1a61cd975c21b84d12594a3eed1d8e3087c3bd139ec06dfb4b2b0faabd2a61. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/AUBEC2235028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b6b34d0b11846cd4f100224d76d0f0b7976df8d6dd22dc81053c11a55a2d5a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/AUBEC2205863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efd61327c273ad1733fccc9bd527139c667fb748ec8cae151a4a987f05c8ae0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/AUMU00000056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51da1225292aad72c8cf5fa65b10fe0536c35048cd3cde6e7a3ebf0daebf391. 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/AUMU00000057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b94c2732a415ce3d88626cbcd65a72ec35073decd1f58341a1c8b53a9be2df. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/AUMU00000058.
What's a Girl to Do? - Live on the Panel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe7a3fe4a4e49053483a2feac715060e8433c5be3029a14ad55cf4b092cd9e3. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/AUMU00000757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3ad7cbba5a3710ffdce9600f074ab352b10b7bd11ffda99fcf83e0ba0aeafd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/AUMU00000340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa9f057a4e8004f0ebe95875e985974677b6c06bc7316be5e57df785004489e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/AUMU09900249.
Bring It On - Music From The Motion Picture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd11d48239c8aae82eb77db55b1e18ab0f1435f3fb371e94b7c0f4bfd2e0867e. 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/USSM10011168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1af6730c971195a35a67982066db667aeb566f3d730ee1c8beb8a9ecde0c8f5. 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/GBAAA0000066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc798361c2b4104b44e3a987dd4558679e0a2b6fdafdf7ee8b146c65c3bff35d5. 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/GBBBM0002081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8366124d15d8ba0fc69d285cd47feb3f3e1c34584aea4fae6a8745578945b0d1. 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/USSM19927092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107ea7eda29d3d714de637fd9085411299987c1a6530cb92a1a4d20cf68fc185. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/USSM10011269.
Bring It All to Me (feat. 50 Cent) - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b3cc00bdd61e6553d66aa73d683ba44c56c5614084516d1b6491e1c632750b. 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/USSM19927958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5150eb6f435c83e84a1c97edfbd481181a95f2cc40981a44dab9b13c210fb8e. 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/USSM10010275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d18dd94d02a462f747836f76230706ffc88b6847b822ec7ca980e0915574fd8. 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/USSM10012376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051814a8274a9816ef1dcc2707a58c05bc942b3ca4b4174f9222b519fe8ed493. 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/USSM10011461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd11d48239c8aae82eb77db55b1e18ab0f1435f3fb371e94b7c0f4bfd2e0867e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USSM10011168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc798361c2b4104b44e3a987dd4558679e0a2b6fdafdf7ee8b146c65c3bff35d5. 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/GBBBM0002081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8366124d15d8ba0fc69d285cd47feb3f3e1c34584aea4fae6a8745578945b0d1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USSM19927092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b9b5f040df49e49a5b3d85929f8a62989d7e42673e308899daf0ae150af808. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/AUWA00413580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2734fbe6dd0af1fd14f30dfa5acff87000bb0dc171afa402289713fd4933bea1. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/AUMU00000652.