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 0x93f5e2b0de48748432f0e1a8df824e4afc0819a1f5d6486b2a576a8c1fb807a6. 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/7338327e-cc13-4981-b8a0-8a676e55a5f0.json and https://artists.proofprofile.net/proofs/artist/7338327e-cc13-4981-b8a0-8a676e55a5f0.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 0x5022ca63b34a9080ae4f59fac259cb2b684cdb2f465c1ed9794c59ce8101948b. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/FIWMA1400150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0024b0f2343d519a49861682f91f377e3b34ff1945833590af68c1b182235f9e. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/FIWMA1400164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c290a0eb072071eca0c15b5eb12a751894aa37dd41ab5648143dfc6f01745de. 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/FIWMA1400165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006c79317af67375f96f3ac47bec5a5f3b14c81cfebc0015e04fb821320fad51. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/FIWMA1400169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73660ea3dd4a7d37f434625cad4ee7b7d072681ec1abce0e4261a40171e96e9a. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/FIWMA1500096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b4c1fce79079e236c2d341a143ce5bfcf692334bbda571396d8ea2ae6fa835. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/FIWMA1500143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d4d25e34876056b5750a0d3bc6f27c55c722c1b5ec508b946ae2670e4a9fb1. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/FIWMA1500144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983c049f11f4dc5d7fff509b665bd44a0f6b972d8250ae25f63765e711a623a1. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/FIWMA1500145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9e8563c681bc7d4c2d7142c0c34b4ed951ceba388322767b2c50f5401a8680. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FIWMA1500147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920b50da911b5123a06ebc6ea97c33da1a2314efa843727ed4d150d681131f1f. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/FIWMA1500149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e0f05baec5e6aae9787e744264ed2c58c685e3b91f737a393c0db8d3f1bbb1. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/FIWMA1600364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c74326c7b5a3acadabd81835be769e8be26db9721a95e6c70b0eff70ef7ee5b. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/FIWMA1700035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074cf0388d693acb25a3bcd731125dfea000748f3041ca63f8ec96d51fb998b5. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/FIPEB1700023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6eab611f05c870a736daca09b48cb99d220ded7e7948b8fb2b6b8612dec12ac. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/FIWMA1700140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7fe2f79c174e3fa13160e1af6258ce4951a65f95b644cc995ef805b2a7a8b36. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/FIWMA1700142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1909fcc26d73450aa713f9714edc6bcb9d0b1732eab09c5c304c2653187cd221. 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/FIWMA1700143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06cd1c655fea4ef322170d17d6bc8417342232fb14a18b78c69d92739df7875e. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T13:26:15Z), 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/FIWMA1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09130931fb9744001cb54255fdcf455e614f3c80622bd5bcbaf19c3a7631b243. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T04:08:24Z), 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/FIWMA1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a869b19f7c6afcd9c5c9ecde9094a84ccd21fd72c7b8025b8a6b711bf7d6a9. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/FIWMA1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd41ce77f2bc42296c6ed7767cad7994112cf9188ab9e1384009c2791f6b6da8. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FIWMA1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec9423a03d1f6dba1337ab1f5fb20a19ff6dd445b5b59f2f81ebd676ddf89d8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FIWMA1900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426076a860238dfb570f49f06b1f310d027a9d06cf60bb3887d66d6e35dd64c5. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/FIWMA1900551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52cf7c63e68adad6315636254f431bc94deb91e6f704529ab7b5bae246772c9. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/FIWMA2000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207a31af92bf855753f5c03e78248f0cf923800c92c34d18b84c51bc00fb27f4. 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/FIWMA2300342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753586db05276ea0fc13035e26a30473dc414270562c27427c8756d3666395be. 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/FIPEB2000079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9500f9df554c8ce91c1a36b5b7569a54d5847aa5f86990c39c64551ca810bc. 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/FIBAR2300345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a4840febc19cceeffae5b90806ef4d788c8d4cea34a31607f5bb6f5319a813. 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/FIPEB1800035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5022ca63b34a9080ae4f59fac259cb2b684cdb2f465c1ed9794c59ce8101948b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FIWMA1400150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410d38d837f6d230f0b76e4a51df150220c103b9dd78400039f4365881e41b8e. 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/FIWMA1800043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbbe12b56d355aacbd56323823a9bb05b2a293deb4b3ce33b1e9141fffeb3a7. 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/FIS201900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7106fb990302cb1fe08f128fd2a7a41d69c8b65e66dff74b5b4be85f1d874c00. 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/QM6MZ2124368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a4840febc19cceeffae5b90806ef4d788c8d4cea34a31607f5bb6f5319a813. 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/FIPEB1800035.