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 0x4ad5d2150aafa21a76f533399ec9b7cee5d33d857ce346f9721ccabd54989f01. 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/5700078b-0a44-4cbd-8691-1e5812d75874.json and https://artists.proofprofile.net/proofs/artist/5700078b-0a44-4cbd-8691-1e5812d75874.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 0x15011b297acf809f0b56c790f33b5c9db5db759e001386f00f4145da192faa5d. Chain 2 (Bitcoin): anchored in block 957737 (2026-07-12T18:02:09Z), 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/QZGLS2040920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a78779d4d6e024433be3e4691627005c1b82707e0707597167a51ae04e9fc63. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZGLS2040925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef9c45dd37ad9c68127c97a381e138c4e7b600d161089f060cfec354a0e21c6. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZGLS2040930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0fb1b03e8ebe5016f433099d054d91790d1f46dcd06fb8ba8b57f228c7529a. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZGLS2040932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b327c3333fb8b7c50ed554734b7ab8648341506d6fc9c75323f73e1d175db9. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QZ5AB2131614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b48bb7f5e0920b063c3cc1de41f0841d93f3c8ddd7ad1176215fb328ab74ca. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZ5AB2131615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9f458b136af02692d35ad590789e3076a13928a5b6426323ce01ae6f7b8a92. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/QZ5AB2131618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95b06d56308ad7d29b36aa48d70b2a845ade6cbdf899bfd4b930f602fd21f9c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZ5AB2131620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14f464242f58bc616b3b06e53e86cfc064172263a420328f7ab4cc2c60525a8. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/QZ5AB2131621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c201dd76bcf9172f95510d56dd722d1ce03bbcb900f3c5a996a63b268671f20. 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/QZGLS2176153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3674759e856485912d1ab58454e4afcfa3dc62fc287baabef75fdffb34a473e8. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZGLS2176154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831737260ec259a373bc1882c893f4181458a8fd8317f1edc7638a897a45e26d. 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/QZGLS2176155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe892494eae639903672c6e422b7ec3742a370dc66bfc8aac4a84778615c6053b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZGLS2176156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fbf5259a492432c80df25b6d71a666ea1fd62565a0f358b00a2c2ae23025b62. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZGLS2176157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63293983f30f5379ee078d144065bc189efdb0832f9d38bc8fa5cfa9f893b5f. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZGLS2176158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0db6b0014fcc1caeee65a21128fba26812dea0424f630c9d3cbf1d11cc501bb. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/QZGLS2176159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c091da2b0619c018b02a8a88ad2e217fc84f6e33e842fb8b914ec1bf8469f8b. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZGLS2176160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60c253e4646601a4d707d5c4555f4b88f9b02e41ecb07b7f22d384e2b3d6488. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZHZ52147681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3cc612b186b4c4402d940b0d769b6ebb7d4a34407b25cf5b0be709080290f3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNJY2133457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33bdc4af67142092924c110d87d80302c44e15e36c23d0cc1048d1522ead521. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/QZNJY2133458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e7b69e7071d844b1073338044cf1bd76d9203209429ffe95771792faa37c2d. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QZNJY2133462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc926ac1b03c4b3ed2c6c17837349e125b4b466d628505244a6de11561b1337e8. 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/QZ5AB2216517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d1aac4ccb7167f94fe4a45b0054417238b2c48a09f3510eee2f386d1e7d8bb. 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/QZ5AB2216518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463958d5e58c797e53cf0ac4bb1c80427562d4b070d01ebd79cf95f751cba2ce. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZ5AB2216519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a15c88b185261b29c10acda580cf368ee808738a744f4caa3ee047e4faf68c0. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZ5AB2216520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e49601c89d8fa601273da07060cc20a45b42539a53c3edce62c2aa11fc4e71. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZW9L2210545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8bca496d9f7ff880c6dab4d1b7ed39efa5b76ed378cc510dda7a277768a7eea. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZW9L2210547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe640589bb5675890e928741b45a2d4209d57861cba26630d50e9fc3e1303f9. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/QZW9L2210548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37c8e959ecbd271905dba4327022c1c262fc2899a3bc4e973ae2b1d6d632a3c. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZW9L2210549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982b342626b6e3dc5c1110c0fa686a706b6fe507a59d6918ddf3f06149d3bc01. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZW9L2210552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd766604c7cbf0b17abefc4d0549a9c205d982bbd91add503767deefd9d2ce5. 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/QZGLM2360514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc83f162b930c1d3879bfbf723a814367f43c2ee849d4adf33b500d19c7dc31d. 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/QZNJX2363909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c418eacf325846e6b35d638821cd482088e108a16168bf5a7afc417712c241a. 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/QZNJX2363910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fffa99cdf280b09fca0c04794156959a08fe4219fadddd45ede4b4440003490. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QZ5AB2424825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569286f9f79481ad936a832359c9919c310159ecc3e6e0fc7e26597faddcecc9. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/QZNJY2587113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf1b41b9cb0aedc7fa8348134890bca345fb032d5fe3faf29f8eafd457338ba. 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/QZNJY2587114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f28c72aa7d3d6f4d23568f52ff76b694e3db5108021f3bf4b419d27d139c92. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZNJY2587115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c51ba53dfbeebcf4a85f0ce0e2c7537027e9fe740018ec4523afb59d2d055e. 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/QZNJY2587116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb6bc331301d924f8d0ffbbd1004da7f7fc26024ccf7141d36ccc2b19581198. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZNJY2587117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46cef653ba6bf68c13caa53181ccaa4e980e3878c0ac8ba7c76c95a137ebdc68. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/QZNJY2587118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e11362a051d649366e90bea790e3998eae42ffa910f90c0d796d18394a7084. 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/QZNJY2587119.