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 0xf2b09929dd2dbc00b65652094f58d34bad84ac8ea7fa9f0ad9bf18950eac80f3. 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/5f92a20c-5527-4ed8-b9de-f70c97d53d29.json and https://artists.proofprofile.net/proofs/artist/5f92a20c-5527-4ed8-b9de-f70c97d53d29.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 0x13e6122abc2baf41d2773f915b9e5ac49285b27e4f937ea066a376704205a9e8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCACD1529535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae86304d2012871aa4c072b75fa4d6aa16939fc1f9d540a3a81e1a8bd801ad72. 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/TCACD1529536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946a8ec215b45f894c0c15d0974e9e7bf6f855f8fa29e8021c473e093c6d4ff3. 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/TCACD1529544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a34a09e8a42bbada5c5d82dd330c7d67062e8cc9d7fc798078decb1cb59e7f2. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/TCACD1529552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4bfe1c16129306786a5b3f4e92854bbdc8ab7cee2581531f57710532e37ad38. 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/TCACD1529572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f11fd8f1258388341d68e3f65a9f62790cb41f1401030e9fae9dbde7afe4b8. 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/TCACD1528914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2400b5adb1c9752311bc344da75bcebe4dba8f41d906805020fdacb7563b8c9c. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/TCACD1528917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd856887ba2be0da35f7c5256b450e5bbcd0fac1b8c3b30c180680690c2185a61. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/TCACD1528935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe969ffac8b7d07a8b44e82b2d19dbea402a5d950031d6d0b0bdbda435d7711c3. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/TCACD1528950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a004d8d8865eb26bc0b27dd1722b14e7de6d8446a9b45a530ce062ec9712184. 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/TCACD1528962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4d196bcc44d8cebf34636a301f2d8db5ad2ed3c56325ae93f701cd42f5f06f. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/TCACD1528964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a2a25eb07fbcee9ffc5fa5a635f49dae348493fc697a5dc8ec728baa73bec2. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCACD1528995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33dc87f090b45f9e657aed3281e39d9459b1711982e67ac84db368f9200a249a. 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/TCACD1528998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79ca4c608fab0b029e7f835236f2c67163275285dc9e74b3976ed43c67c0425. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCACD1529003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501242bb819e2bb8e82891beb8224862988b36ab7222ed7ab943fa7168470ba5. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/TCACD1529005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba37a31687e2c9f47a07fc8068edaf18928fc5cbbf63ed78df3446bb42786bc4. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCACD1529011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb772a568f5c9bc310d780312dd65e0cf0eaf49b2be691db2e016f0dc9ec32afb. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/TCACD1529013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f0a92e0b751442d9c121fc025f58ac83319551ec1d9c1f4a8ae5a24952ac3b. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/TCACD1529017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ede92e781fbca2ad93d0753e45bbe64019301bedf0c392f4576b5fd533e98a. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCACD1529039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db46e59cc1a8c332b3ba183d21b26e952627b89cc6a73d39c8503293329d706. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/TCACD1529047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb88a29e52f8bc8c630ce97f2ad934f1c97db75669d84792185dfa3c00284b9a. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCACD1529075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab0a77e18b463947470cafc02cdbe0bbd1d424ec45e74c0fe4421677e181b0d. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TCACD1529076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57a9aadc4a17d23961742148dfc4c64eaf3dcb5cfb0165629a5bba1db3aeeef. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/TCACD1529077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0e0996aec420d6929f74525669fa1f4aebeb4d1d795a123a5c18f51012063c. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/TCACD1529094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e25d39d999a34ed3b74ae6dbc0011fe38fc798917842d169e0defa9a8eaa8f5. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCACK1554755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a34de671feb130c895ae06ccb99dab823299f59ca1ccee7b3a6ccedd398511f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCACK1554762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4abcf01edb992ab8663031776211048dc5867d5fac9cef434a99c8c357e85e. 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/TCACK1554809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c6006e2cef4d74cb856d6bc2f2f20b96e8ea7ad8a0f65cf351c51a345abe6f. 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/TCACK1554848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a740283f4ca4158f1ba3f1026ccd8724490097dcccac50a9d1d3b62c7ef382. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCACK1554856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab77c3a5549671328e08e426c5eb62c177b4532503dcda4aaaadf190851684d. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCACQ1678097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975b3453dc2b2049169d6de225a740d09b23929e11ea3a8aba73aa9603efd274. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCACQ1678103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd824c93b53895b57e93eeb0f7703aa6a67c8b4f88a42335f913cae8b3834ebf. 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/TCACQ1678105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d268ecc652b983fb40d403140116416c9aa454b6174af3739a197ddabacbe3. 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/TCACQ1678106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1bc2f83876ef96b93e0b793c3ff545cddfb6647fca87e505d3fb6b49310337e. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCACQ1679326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587d856aab7401a45e89ee01af621b21df94c84b5ee3421fb03ee3192b53b281. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TCACQ1679413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2667c21bee5577ea2487595a5e274f8e5a73a533c11e31465a62a4b9f741ad. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCACQ1679511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4ab15384340afebb9c2df753c3883c0b852028defa66df360caa0d0a99e8e9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCADM1846225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2f2a1cfa44b1f68a71eddf533088fbbf1ff2469967947ed1058aeeeb54919c. 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/USCGJ2059227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bcb22683e98279f00b80152986f2979e91e32381db49eb26048a73864bb61b3. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USCGJ2193591.