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 0x501fc70584df63e35b0b7d1121e5af032648eaadad85080d0eca2621c030fc74. 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/3840a3d8-b0fe-45b6-a0ef-5fb554b660ad.json and https://artists.proofprofile.net/proofs/artist/3840a3d8-b0fe-45b6-a0ef-5fb554b660ad.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 0xb6bb84ce38c7b61e3eaab6695830372fb822728f23edb6e007ddbb3ed43652cb. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZFZ62256603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13240d65e08aacbfd83d45b77d6721600ecfa3c98757d69c783194203dbaf2bf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CHF032201282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d0031fb2715f9ddc2c123654c5a30eeeed04e6c182453c7ab324afe4d46dda. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/CHF032201577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c13a99e58005c41db69d73e22cf2243fc8e87c9aa0daef4020a08155d770b1f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USL4Q2292618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b32f4ed7cbf4c31e90b27125ff76d10a3ffba0a3f66873354fe940a1910a90. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:55:11Z), 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/CHF032406843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50dda52170cf07edecf7e8af8e584142c4bcfbdb562c98481d226f060bc64e3. 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/CHF032407713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f145e04e4ce3fc85524c49ea7ed7b586e08b90a50fff09dd05512ade2a9234. Chain 2 (Bitcoin): anchored in block 958635 (2026-07-19T00:58:42Z), 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/CHF032407795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064c62edfc729ff22479e41eddd4df03b0e096d5ebda93458f792b13ba207d9b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CHF032408830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f0baba1337ad1e4d6a72e9a57a0b3943b22a2dc8d80bc5ce86b0147b261e28. 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/CHF032412824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713dd26384e914fc959ee7cccd119bad91ffee1afdfc0ae7801ed05dfadbabe3. 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/CHF032412825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9754a30c58553eca435493c9fa1195802464902e1b78178f3e031a0aec7948df. 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/CHF032412826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea46ece29ff99cef0b2391e4af234da1522c1c605e055d8af0ecd590faf60b8. 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/CHF032412827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe72dbf957767bbd786166dd111d39e01eae0db7840cbb0fa92cabeb9298c731. 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/CHF032412828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee53522272e05c2aac55173bcb9a589f584430d9e659f93493f832aff629b99. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CHF032414218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee53522272e05c2aac55173bcb9a589f584430d9e659f93493f832aff629b99. 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/CHF032414218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ecd31bc04a44f0b781e39226a1132d43d52a583aaef80a8a55e713c260dbd9. 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/CHF032414899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a6cd4501ed6bd2660be242c6f8df94d9f78637a5d2000815080661452cede8. 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/CHF032414900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd9df47ded97e47094946417c65eaf66a4402ae3ae16e909d4a7ab39d2b310d. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/CHF032414901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345375741237524f3fce0bd5164a7619c3aba056c35ec6daf587c161ee527f76. 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/CHF032414904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31d86d456322d757b0ec48328ec8065c77e9ee41d87db098e038c5e0bd2d6d3. 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/CHF032414903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064c62edfc729ff22479e41eddd4df03b0e096d5ebda93458f792b13ba207d9b. 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/CHF032408830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ede36031d37778465a8066d022182c0ee71695a24d9163814afa4f270df65c7. 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/CHF032418085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5704b1068c6e47661c77994fedffb0d9c54d86e7fd120b55d060273b67fb67f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CHF032418544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940abdcc703f22848c01b58bf390919cabc845b2933e0d0d53b1b1cf8799008f. 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/CHF032420189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1af6315ad54ddce124babc1d05dbea692d6a29635f8289c1763e000d51b75d. 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/CHF032403845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625d86f84e9959bfa3ae5a8d8f4e98b890670572e3d11e2d140401ff97a83f0e. 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/QZTB52264230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d20d0a6a1fd9bcae2582eca11ae1056aefa83b342a110cb769d1e0c1b272528. 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/CHF032421014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6dc74960a05784dca550ce853d5ac960fc693d976b7139d6a63f64c362ad22b. 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/CHF032409684.