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 0x53f74b1406bc6fdcbb6ffd3dcc53bc1596250f73a680ff95052f9c7dbe7e15c9. 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/7841f4de-b064-4bd8-8756-68b2112874df.json and https://artists.proofprofile.net/proofs/artist/7841f4de-b064-4bd8-8756-68b2112874df.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 0x9fdaf7ca92cca55d2fe6ef719e5cdb776f3ff503250e620fe37d286466170a70. 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/QZWDE2429046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a729ebb2135f2f872dc0877f564ec1d7fc1c727064193b4a069dce1ecd28e1a. 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/QZWDE2429050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859af82a1c178acc8d18b713a23d12e3ed3c7d38a3f4a9296ecb3ecba771e3c0. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZWDE2429052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332e7c7b843095a5a54633ce2767bbd06de1f9035dc968aaed0b086d3f5cab66. 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/QZWDE2429053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bcf296a2693b14d1814d8d385341f787faba0d65457b722077b75aae587a649. 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/QZWDE2429055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e8b7c05a5af48ce3cf328dc248c4f1155e164f567b709f61b4d92e52b1cf60. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USWR31100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7bb0df6fd2b3efdf661a83f5577c1b809eecd7d3d53e6cdfb9c9586df71f331. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USWR31100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2d4a78e565cc250373f59601b0a5026d5acf5f4528667d39857dc52bb3b630. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USWR30200052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8302380617e7cede8ecb2b3ff4c16e1aa9073d40c8b69035dc6d5b3868bed477. 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/USWR30200053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3c3f28b7634a9e543ab715033fada8bff804bd6a0e9e1599fb84f934137d2a. 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/USWR30200054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163b3a41b7e3c3c6729c63bfb6270eca1bb1c5151a538e6984953b5f3454bc65. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USWR30200055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38b413a085a09f901c164579450a2fb5b7674e84a411d06f5ad29b41ebb2096. 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/USWR30200056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78d661805898c068aee26dd8a9c25599fb49ad772507c2df76d039282582838. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USWR30200057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01fff4aebe8e53b62c2b43c61597b8aacf4c4eb79d124bf273128ce42384ecb. 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/USWR30200058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487b71a64c36808f92f9016c5f678bfad4eedf06cfce97de168bb75531f87713. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USWR30200059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd44388e34ddac133869217fa58b358025cae96ec7ffa92d86ec52ed1fa1f9c. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USWR30200060.