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 0xa05bbc865903245ce57cdc69c85c50f07f3809ee3c6388880d742ffe4c658018. 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/f9eb5650-c835-466c-a729-fcb29bf3b52b.json and https://artists.proofprofile.net/proofs/artist/f9eb5650-c835-466c-a729-fcb29bf3b52b.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 0x94c6a4d038cc57e4b99bc82b8ef8d189c889448f58d8b2a767e68949d94dfdfb. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/USL4Q2157402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e423b502d570b80cc5567ee496ec53e3693a778965521bbe1887e5d00c1e90. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:45:34Z), 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/USCGH2275001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32379df12fd05ebddb98e400e2eeaf4e78f63c429b152e2b1053caef503d6ac8. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USCGH2275002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8072f51ad11a2c10df496595d06ec2913acae3e4ed477e132a22b5fb2901b9. 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/USCGH2275003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c818681edd3039b0d095b8b7758726999ff8f2e2ece5697826498329098d96. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USCGH2275004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60ad4b6259cbc7b0abb7440733e0f58a0a733a0392d4a132580cfd772f70086. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:53:29Z), 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/USCGH2275006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a4fad0cb622e803c793a0ec0641c9a63f349e1d11a64b7f6dd685da5ed3bf7. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USCGH2275007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ace48a5fea168bbcca6ab28a27973bae1d5725c1d5fe83ca788385e2477e46. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:35:13Z), 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/USCGH2275008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de0ad98fc07cf38a00263882457fa3bb3c242568d526be8da784c649a8d191c. 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/USCGJ2489456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de0ad98fc07cf38a00263882457fa3bb3c242568d526be8da784c649a8d191c. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/USCGJ2489456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ed521adc8ad47b2220f51b4442c5aaead59d28ebfaa0714506776c13fee465. 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/USDY42445047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7b399a8dc6f756ce50fb12d160d0b667f837bfb48ffe38041de1403905c708. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/USDY42445048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847ea5679a38e22841ab3f5b50d66488669c8db4082662acc9629fb094373c90. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USDY42445049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1db6c6cfc1b76bcb2d9715c26c5dee17f128555f8bd0d53eed88cb5e5759c2. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:52:16Z), 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/USDY42445050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f9559a2e460d456cc9b0ddae7f058acbe39f577489e9776f6c245feaa26591. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:03:19Z), 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/USDY42445051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91172c8fca9fcf4cddd7092a8ff755192a470c88061de5ba3675664d4b347779. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USDY42445052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba544794e8a8b6fab14968d33424074f7197f4d7bd5d77e7c2f369b885e10258. 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/USDY42445053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7b361f539781d39f501a05d4cefcbf9ad83de4eaf0695c22b382d7c7af585a. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:09:58Z), 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/USDY42445054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d09821ef884897c4db5dc66299770eabaa354255286bf69124d8727b20c7e83. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T12:07:21Z), 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/USDY42445055.