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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fe11d33851975646c43ce322cb06817e60d2572f8902ba894b1af9f2f279bd. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/695f3994-da52-497d-821d-55b485950fdf.json and https://artists.proofprofile.net/proofs/artist/695f3994-da52-497d-821d-55b485950fdf.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4d786280e5b14b5293a8c1958f5600d8c6db18eca9a54051ae376b993c2111. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ARQIW2502556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487f5d36da6a017d06a07d18207f07ece83d53792653aa3c028ee073044b5e82. 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/ARQIW2502559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d1da27f0a68992a8afdef6a6c88411f58ac4511ce1c97510a4f509f8f946dc. 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/ARQIW2502555.
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 0x06129810156ee1610f175634cc455b7daaf93a54a9d97e30fc7c0ed68a926fbf. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ARQIW2502557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43259393fe07c9e46cdc7b6f8f8c30b65789e2fffeddef88d502a8e02dbfa08e. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ARQIW2502558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4bb98de4c51ab4d2d4a2cd77c1e0ea492239ab504acf4db5336faccfdca7a1. 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/ARQIW2501776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6487e27de8d75b8835aa4dd05079667a5816801b556f8e77a58658a5f01bac9b. 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/ARQIW2501778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc26ae04487942c261d51dd3e358ff62b51ec11ae20b12c4c1af001da0c4397. 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/ARQIW2501779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2fbf9e184eba2ff6680d329a25594e9ab7dfe5e350151f39de6406bb38ee06. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:47:19Z), 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/ARQIW2501777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed69583f9c7ea7ee0d0dfdd9052b49230bdbb4e82e1ecfd5bb385b61541ff0c5. 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/ARQIW2501780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f7deab4cb5432cfa2b6b41740e62f4fdd31dc7692289d75c5daf44215ba2b1. 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/ARQIW2501781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf519c43df4630445a7f1f0f26eb89016ebdab6cb141eadcce9591334ee5d05e9. 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/ARQIW2501782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6246b27bc954586baa710f0407a5c4fa5c06dc2f4299622f098d4fa9ccdc8a33. 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/ARQIW2501783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81df2083493a4c10f7f7419733e9b52cd7ee58257174cdc18f4da72c60251db. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ARQIW2500357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261f14a4c5fb016788600249cc5cc59654fadd359f25669866a8130045972de1. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/ARQIW2500358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bfc46ba313f50c13f811f2863299f0ced28991aead4b09adab2517aa980334. 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/ARQIW2500359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff70e2e6d87781697d5d19efd708f3a6af20bd730bced8b1881ce0bec90b1af. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/ARQIW2500360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8cb7c9f7f841d46ba5d1250ce5cc6765e7bb7af926d3ef05b25c2314c4b494. 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/ARQIW2500361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139682d7a9fe6e33ae6022d2869ed079e2da95777bd88e3e4079d759b3df9ffa. 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/ARQIW2416525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1b9f351ab3e9bff1faf8853a955f1e925bbc235ee53ff243f47713360e9454. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ARQIW2416311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57986d7c2f987bba6409917297f508f85c1b4b505e6171052c68ea54182b8e71. 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/DGA0T2421186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03096e753f546458c8cfd8d4b1e4012a9d4f12cc38d0ffebd59b280b91d0b86. 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/DGA0T2421183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9489f6c75e106d5c017baf83f349585af3a61ab2e5f774905c2e2e3ca938583. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/DGA0T2421184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2929a17aa49b55d6658dc89a738f9c7679f7cb8b64ba4bfdf0002bc02a79bc71. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DGA0T2421185.