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 0xc56df22c16d715d7640dc8462d60dac2fec23c6583d5a3b72ab89f4d286e6a1a. 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/87f183ab-31a2-447d-a67e-c76acaa7c585.json and https://artists.proofprofile.net/proofs/artist/87f183ab-31a2-447d-a67e-c76acaa7c585.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 0xb4ad8169eb09e580f93f48d660d852fb7fea8e42bb20a17d25543139fd34b08b. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/CH6542276586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1a5b48c27af77846eb805868cb7bf97f7f491c4eb20d2e1fbfb58d4a4b336c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CH6542290130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284d06d23edac9737418b14caf822ea61e835a54d016ac1a4f845314fac232c4. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/CH6542291261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3666918e4cb48bc37783389ca3776e4c6c25e52bf8828754ea2cb55c748a8a89. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CH6542291296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27290f5fc99bdfd710de1c822957a740ec495954aef737f2459dafcd3da9c2a. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/CH6542291259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd477b3d887458a429068f09a099091d157477ed1b1c2ed497ace7463cc1cd3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CH6542300313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f9f07d77d877d58bda2c17af5e75f9c0c0766b7a6eb31ae2f22654daa73ebd. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CH6542300314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36de8860dca219e51fafa4fee16fec7e823c4fe4836ccecc9f5bd5b3ffbb5d5. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/CH6542300315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dcd1475729883717f7d5a7f50f515dde2f7d4bde84b748d8ba65108fcc0ab6e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CH6542300316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3c9abada5f36c28084a46d18367a880e8efc1e6275f53d9bcf9088c0e28861. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CH6542300317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd600f3f80f42b398ac230f24b127ff077b6465fde3f807d1018864080986a01f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CH6542348766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca49a03716707dcc7acf9b37646235a55f862de7d35c9d597704a621fd13bb62. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/CH6542348767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a77d3e87d3f09b79a09bdfe98c98bd04d2f5577f5ee2535f6d6e3c0bc92b8e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/CH6542348768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d16c4b6394edc4c76843ada6276445f175e1edbfcfae5504287b668f4e0a40e. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/CH6542348769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120901f89e8b558dfc3c48d8b4a75e8ead5aacd99dad7c67ce5ed7629f54868f. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/CH6542348771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0ca47c04945a03ef97ff8356c3d7367239f2dbf0aea6ea60dcc135b2a77ffd. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/CH6542357390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a65a69a4c7e3a07d5ea114c542f9f1d2e89f7c3823614b7e0107e33aa056186. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/CH6542383970.