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 0x1410c7f5645a4f7d099594d48ee374466f0118fb63f53fb46c2c5bd53c9291f2. 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/63207f2a-8a5f-4a8d-af1a-90496bc7554e.json and https://artists.proofprofile.net/proofs/artist/63207f2a-8a5f-4a8d-af1a-90496bc7554e.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 0xabe7173b257819dc4fa39c87e5204d5452f0b15ef01c89af1ef4a655389ec264. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/INT102400769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc321f2e74e55386e2c45e9db4c1455d0ddbae4efd09817bbba2b0fce1f82d1. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/INT132300370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384ce32b70eded3e2b96ff6f2052d2f6e25a1b69d33c2c46e06c89c209753d3d. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/INT132300371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014309783be30d72a49a1217a283e9ca243be577b6e92b233db2d8bc2f987054. 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/QMDA62468717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781038ee935ad344a6adaca810bce02b8128084c0239f2e280a0960080efad8d. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/INS932401009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4261e788f5aced655a7b6ba7895825338e9f7525745a3f8491e9631a71e92d. 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/IND292217374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252c8c51fc889a60d23c92cc668c2f3d7001fe90cb9e479b2dae13bea54ca2be. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TCAIM2467284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe79bc66237f2148b6ea53c61ef7fe3882623834caddd57d8cc3153737756a07. 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/INL232451222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1940ee70af6b4d391ac32af6da86d6fa495657bdda8da097735c2bc736eae999. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/TCAHZ2469322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7620e96bd9735568e051ba060051246c5a27c7286482b04adf4d78c68913a5fc. 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/TCAHY2452782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec9d883c21dfb2a0d09e6eb489b36f916369d6ed07914fde084098e80843694. 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/TCAHX2408174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a9abaec71de5cfd9b69063a09ac3e0f5905fb680410966ad2efb579de8f287. 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/INE182325462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2158a7745068918496de1facb56dd6a3be9ea04f7c0846156b7cebc953d7c705. 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/INE182325461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee2adfb3eb0aef8458768497e110ad35a96162cbc4183bec0abf3f296faaa87. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/INT132300662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d484d6a90754c44397cc0630de2601a0a4faecf72185f029acc184466cee5a. 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/DGA082367953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e97796e004de8d3262d741e710132be1de9698335830ad0391784c50d6881a. 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/INS172302448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb9d67af90beebf9d5bef8ec1eaf43d50ba339be8a4fe802c96bec291ae971b. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/INH102304817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91037aea5cd408abf38db91a8aa9fb13652a6dcebaa69f7ad3c0da1251c81b16. 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/INH102500583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff4e2cdad65b7616775074160cfa30f0177f2ce3ef48e917cb04fb3e42eab4d. 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/INH102502009.