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 0x06dd8b7358fe5d537f637e2804a91e72a89756be9bb7cd14af025c60009b2578. 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/c4b4a879-787a-42ca-955d-f9e1dfccccbc.json and https://artists.proofprofile.net/proofs/artist/c4b4a879-787a-42ca-955d-f9e1dfccccbc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
On A Star (feat. FendiDa Rappa & Raiche)
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 0x956f13a732bb307dbdd6b1eaa8e9de8035305f0134435261fbb1d4662ea5d88f. 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/USAT22202091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c5000326983e7b69b2344195dd098f0a592ab430c2fe4308d3b0f5ec089f2d. 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/USAT22201338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ef3c71d7464a7932f83b25de57f54ecb1ec735b9b0386f145b04376b8526d6. 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/USAT22200304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa644bb478a78c6ffcdc812eaeedf86483e100f4fcbb51223e20e5a3320a5aeb1. 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/USAT22202092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d5cb9e3832ba5cbc278561ca883958be1748667b895277c5053844b40ae485. 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/USAT22101506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ac496bb7105fc1e466b208c3866b549bbf94f564d7a60ccb7d4ea9956a0ebe. 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/USAT22101509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407908407c53010cf745e1d83b111e9d866d328e30bfc0476d3b0e5807366f10. 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/USAT22101513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe3f56fcc84403ced7f4e6a6f6af867558d892425a9e2af6ca2988e8d7da3e7. 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/USAT22100486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76352e1a58ce832bca09237888e2aa5dc4a0f8ea0fade8a55733a05dd77c60a. 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/USAT22101525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26539a1dc47e19a2d1c76a86c3e4609c08c723621971feca2d8495e957be20ba. 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/USAT22100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cbe9de7737937ec351ecfd4c8003dba93bf14b4c98c807cc8754d98c4322d9b. 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/USAT22007110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2cc48ca10d0a431a91e0ab9f410f802fa62fded28815c6182034db208d948f1. 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/USAT22007112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47644f742d1e794ac3a09ebd8767740954345e1e5a59637de6296b874031f5b. 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/USAT22006813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd29556165741de50614bb8347bd7d6d0627859c08c4947146ea92462dc27179. 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/USAT22007114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54724861c247aead2766d212e97f24f795b3e00b4afff5fe6c996e4bb73f8b6d. 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/USAT22007116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73caf1eefd8ef07ebc17f39706edf218b3405f6660abf8d8a047abb7e4cddd13. 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/USAT22007118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173b90523aa63c5f22d37e91975ae626910442383886bb84c13ba2f75d80ee1e. 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/USAT22219651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ef3c71d7464a7932f83b25de57f54ecb1ec735b9b0386f145b04376b8526d6. 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/USAT22200304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe3f56fcc84403ced7f4e6a6f6af867558d892425a9e2af6ca2988e8d7da3e7. 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/USAT22100486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2cc48ca10d0a431a91e0ab9f410f802fa62fded28815c6182034db208d948f1. 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/USAT22007112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47644f742d1e794ac3a09ebd8767740954345e1e5a59637de6296b874031f5b. 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/USAT22006813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9dcc9fa4a4aec4abf97e68def53ce4c4767649d5baef2e345305ef53781547. 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/USAT22006589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79be61765a00c1156cd219bd0a6f62a0bb12c9861b76edd168d61a723914c5e6. 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/QZFYZ2044391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02bf020ee28fd2ff55131cc4535f8c5d82af1c1cc03d90defc4d4c84138037ac. 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/USAT22101038.