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 0x8f2c2556b2970125380303da59d644907b80ebb57ce22c63e66459e9ad165c7e. 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/91bb2e4d-82e4-4df4-8ed9-2ed064a046d6.json and https://artists.proofprofile.net/proofs/artist/91bb2e4d-82e4-4df4-8ed9-2ed064a046d6.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 0x32bea62a21a05b66e72eaaee5e39e680736400d13b3b410b9721f109436ef750. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:45:58Z), 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/TCAFT2161323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab764a67391432533134e19232939740915da3d30669d5359915cd031d9c7784. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZFZ22196036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48546a89b19e3f5b21fb97fe1c036167649e3a5dd83ade930b6532e594d3d385. 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/QZFZ22196039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30a11609ee4da00e9b92705f6736a70d2cf912872e3d1a5bafcd027798e7c2d. 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/SE6SA2153624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfadabbceb05bae9b66556b4062f8461c9554142737feab84773ed0d51f26eac9. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAFT2161396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079fcaa497ee935a1399f672ce685ef1ceeb093f7e0af251422fc9118a4a9298. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T10:50:00Z), 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/TCAGK2249714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d07f1c154eafd8abbafc499025400856d94b0c02e44169858d27fd86055ad54. 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/TCAGK2249740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b95ccd3a91fdf3c4d5fd07c15d1e2d5ac02d2ffd97b4f4d60d8da0625d4e5f4. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAGK2249805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05425def758a48b7fe5465b5793195248b25f4d33042508c52a069a4fc2b2060. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/TCAHH2343454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e3dd5921bd7550f850017eff5d4c1ddbe341577ca28bcb288f3d72bb1a3d9d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAIK2495255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783d53dbcdefec3c881153dbd11227002a1fa6581774a4b727498561b32c379f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAIK2495331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2851cb4c9d80c1717794e26b10cc109ff386b97989eb1f862a04b6e0cd9de2. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/TCAIK2495354.