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 0xbfcc866df2002ebf39ab04bf710fc1fc3ef8d9ed660350fa481299b289faa5bb. Chain 2 (Bitcoin): anchored in block 953915 (2026-06-16T08:36:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/19f8c10a-1bcb-4b59-97ba-b05969d57486.json and https://artists.proofprofile.net/proofs/artist/19f8c10a-1bcb-4b59-97ba-b05969d57486.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Speech: A State of War - Neville Chamberlain
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 0x36d48065b8ef244d7dd5de91b27806ad6e3640d56f6c9c99600811520a16b6e6. 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/GBAJC0304325.
We're Going to Hang Out the Washing On the Siegfried Line
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5075338bab2104d7e86156f4c3889a2a6a72c2619aff68fafc7e227d5f44242d. 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/GBAJC0304328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7a7590d6dc58a86a4f862d5b21715b630a0d2a95b5c4728df496afb50bab0c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBAJC0304329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee0fa065681163cad8d6a64f425e568c159e3833b5a04bd510c1913eabb44dc. 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/GBAJC0304332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ae7b97fb0ae41d4ae1de20c3d67c05ff8922c9b6bad071f564987fbfd3a1ff. 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/GBAJC0304333.
The City of Prague Philharmonic Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24d5ed15a1dc16b5a157920ab546b588733aebebd6da15300ba16090e90d6b4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBAJC0304334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171616b20e811087cdbb9941c972df15cc17ed421115de346a076a2d9b0b7719. 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/GBAJC0304335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1cb5a2df9df1f1b35ad53a05bc29177a58e7b60d1225a8a421f0879dedf0cdf. 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/GBAJC0304337.
Warsaw Aftermath - From "The World at War"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a74fb5548623693c0af04f661e0b49da12e181fcdd5093a42b95540c58888fb. 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/GBAJC0304342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cbe78e8412b9f58a9289ed0ebc89c40aa9a8b50f3b5ff7a4f8fddb77e482796. 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/GBAJC0304347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709d4af65bbdec0950ad9f37fae894618389984eec39fdae3276d4079dfeb86c. 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/GBAJC0304350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20aaf09bf2f84ab056fc87ac26bf9cde6fde4c56211140fdeb78a6a884aa4626. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBAJC0304351.