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 0x5a31876c84e2438ce16dea36c358cda59fb6edcd32240bf6892e97220b469532. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e62b2d1-7c0e-4116-b53c-71b3adf1058d.json and https://artists.proofprofile.net/proofs/artist/1e62b2d1-7c0e-4116-b53c-71b3adf1058d.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 0x18675a45eb1b720f2ad1fc590beb5758778a308b01d4f7cb6d30601115334247. 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/QZES81807714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd126a359b5869ce4fee23c6fb3b95564a116162c685dafb233b27e51e96dd635. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZES81807718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07955d73ac1a3800ad933847d1c34d6567089b64eddfba411a79b4993072fc6a. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZES81807723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d28bf6ab9dfedffbb8133c31a7e26632641d6c297cd7f6dddaa2cbc9a025a54. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZES81807724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061da44d757a736a044f5c5fe294824981117440607c6a5345a38b370269d1b9. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZES81978554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9957b3516ed6efc101e782833cfa6b92b7d8902c94f1ca7d3bd7c7895a204a96. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:46:51Z), 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/SE6A92026242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a736da84f32dacf54b788301099e46a0c12d228ef1f3624ff6f5056b2f56f07. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/SE6A92026243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343166e3228980a2572a230a22d21eb17439bfc9e92ea569c33ba5997db4d1da. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/SE6A92026245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3e108d1345b111b4a1f6eddcecef40ac944350015e64e81dd16db0f01cc063. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/SE6A92026246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4615a5dd995ee02aae53e5fb82a9222fa0e786c5b80c8ceed2680c428b16c94b. 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/SE6A92026247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14364ad169039ccd4d8909f94f09de6cb327d8d4580cbbb31d776171e2b5c5c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/SE6A92026248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ceea2f050134c428bec53f6a52d064642256001b6969c8e4f0715678ac64253. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/SE6A92026250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb47f63de62c8d12d64d9da0710e43d651674d27f71bdac5ccb612df126c0fd6. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/SE6HN2258136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9349d757aaf7f2269640680d344b3dd1a22146d6f93b638bcfd85c99282c1e31. 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/ZAQ652401242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad149879fff00e8515fbfb7d034277d63a604902c21b1b9af2fd0d4a50baf5c. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/ZAQ652401243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f364738a68befa9b48805b9b5dd306d4ecbfcfc14ea2c44b04d5d0fe39f9a3e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ZAQ652401244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38a4493ad029e76c004be9535851a7bde1d64d41b38d1f8fb939cddbf8143b1. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:31:17Z), 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/QM4TX2587721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735db9f4b59a519acb4a3240ca0425e1f770e22a604a87084903593958c424d9. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/QM4TX2587722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbef57bd096ea1eb0cb1f81b27f9a9ca0dc4d4af195ba722fd89661b4da4f6d. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QM4TX2587724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ab95af261a7a3386ab6b2aec4e850eb84e4639ebc7b34a7c6d8634c2596628. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/QM4TX2587725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047db26aa41f89da3bd4340df5c4dadf9087683ac1c50397c4bdfa8caf43e5a2. 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/QM4TX2587726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7e3fc6baec39345291ab0250331fc3db6bd7ee2f3a883df39412d896d3ae1e. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QM4TX2587727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefab4df2596b92ba924baec731de6f7cc98ec92e00a75669731be0047d46b33. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QM4TX2587728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5730999d1ee6e1bd823880e2f1917bf52fead2b29cb1692c0819ffc09046cc. 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/ZA40S2500599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6403cd4fb0255863b50381abc22064267a88af54d526a7dcbfbf7b1de7f1c799. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/ZA40S2500600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20214d0d59cf1316bee615a105ad64e974463c948f3e17dd7eb245188c15b77f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ZA40S2500602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fc93b29994e78c1f3420ffbf08b44ae231f8a967a4ce9e362796a058439baf. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ZA40S2500603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ac8e40d214d2b1bbaf005d543174e821dbdb477d01af9ab991b448359b880d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ZA40S2500604.