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 0xc9bbcc17d8a023885f4cf6268d2769af1eec1ee281b60f1aae55f77b4e56e8d0. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cea41c9e-3898-4503-90a4-01a632424136.json and https://artists.proofprofile.net/proofs/artist/cea41c9e-3898-4503-90a4-01a632424136.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 0xf6f276a175a9d418478e709c949e478ffc12f68b947695f5accf6eb65a4d3247. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-20T00:29:17Z), 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/QZGWX2000727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05c1700f79a3e0b560e51a72a70d3757f642aa403f0590dc316f7b2a32b3304. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:05:32Z), 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/QZGWX2000728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3580bf291f54fe99bc51366867f7fd9ca7865fdb3932f8deff7345b6e372071. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZGWX2000729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3709881803fc95789fe04476411649e7863072d26d225750ce77b627674bb9. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:09:46Z), 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/QZGWX2037139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedeb095fb9adff38adc5307c2481a981b93e60cacc95991f8c26f1efed2c534e. 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/QZGWX2141879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb0c85bd25e822a83342d743abaecde1f41664ebd636ebece4ef43a417928c8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZGWX2141880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f47a4cfa20d82e833761a0b3edc2aa6367f7ee28bed5e3560a146e23531e382. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TRBPU2300396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350010b5f073d4cc98d1217fe853228f72f483a13d9a75dc7a66dc080e02da1c. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZW9K2436122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76c77e618dab435eb82231393887685b3b25d42c29f80c8224db129353434b3. 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/QZW9K2427308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0619ea8b4c3141955f75208b8e01a3b0d817a572952da0dc0c1d1687a5fe5b06. 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/QZNJX2407132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17c75035c12f1fa5919d544edb1c0522c859947605557176d3d69fa23b46721. 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/USL4Q2592697.