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 0xc3c270fd97469cd5399c7d1e0bddb87ad6e4d93b3ab6816eb5cc440839362311. 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/3f22e1f9-a534-4669-b2f8-ce19391eff6f.json and https://artists.proofprofile.net/proofs/artist/3f22e1f9-a534-4669-b2f8-ce19391eff6f.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 0x3545a2601327d67e98683d48640237cababdb20fd18690e287b2762f77b15ef0. 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/QZK6G2016230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9326be6e086e373ec11bd46781389f3d9d3f03a9fd49720de469065565a7a44. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZK6G2016234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3221772823ae45b5a6e65b933d99a3a9363e50aa3f9a3e172017c733691247e3. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZK6G2016229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74724bd8f4f16ac5f16d23b8bb398bfdf96a368f657d9cc27498c50f8530ef07. 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/QZES52149014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70070a73c4b05c79a25bb85cd461adac48c97a4442a06ca1e05b84a7c813283. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:33:50Z), 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/QZHN52108291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1de8937c06071821cf5b07f59348324eaaf688793a81308fba6156244952e1. 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/QZDA82299536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38362ce9e787631db7efc9329c6de81abfa4078a53dcd4a966469eb09a191e01. 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/QM6MZ2221109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66cf748c30dde1d4b481bcd8c4e336e7ac301300135799fcdcffe033bc766db6. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-17T00:13:57Z), 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/QM6P42217685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505c6a673b139cb7af78bac706ab72d5630eef6cdd8b3e45fe4b36fc90921102. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:04:27Z), 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/QZFYY2335847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505c6a673b139cb7af78bac706ab72d5630eef6cdd8b3e45fe4b36fc90921102. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:52:08Z), 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/QZFYY2335847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8183dc38fe25e88377e70b03b80c3c96eabb39d4b9351615338762f2fd5331. 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/QZES72376994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69df97ffc68f4eee276ed6083cd754350a8b77ae37ccdff4996fc1854cad16a. 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/QMBZ92358830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1de8937c06071821cf5b07f59348324eaaf688793a81308fba6156244952e1. 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/QZDA82299536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6756995d9869261cc9412533120eef050c9fdcb0cc77c26c3ab1271ed1f1c733. 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/QZHN52528270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e12bb300d681b71e3e8c27e82fd4d3a92b075915a1d0b1100d91e7d43e2058d. 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/QZTB52527935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc70c66bb28675d101f59b217a373479b79b685e2efb41cd61a8833e17f590b5. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3EZ2577590.