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 0x1ab58d30c1feb109167526062c98417adfb27cee03cce90b024c945989f821f3. 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/358a8378-fd93-4296-98dd-926c90470e20.json and https://artists.proofprofile.net/proofs/artist/358a8378-fd93-4296-98dd-926c90470e20.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 0xd942689991f4a7e07d045884278034dc35ecd84db31e04fdafc176cd3c8a0a7c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:30:40Z), 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/QZWFF2376762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c298aaef06b05e1e256981d3860d947f1a21b93abacdb755f3fdff3b52574d6. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZES62497834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8dc4893bf95311c848a818bc50483610bfde97622fcc91abcc88d7610eb1de3. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZTAS2474757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031737fbb443a5568871af6d78b8f7e35d8d9e967425729015fa5236999cb9ae. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:30:32Z), 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/QZNWZ2447533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15fe42d3f1986f725ad9bb50c785e69be9dc4691b055f0ef08f79503395d28f5. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:15:40Z), 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/QZTAS2476169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13efe55483aee574ba7169edd70bd0467cb06879c772b4f185ec239c406bd382. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZZ7U2463709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c173a327b5589ecc1c6bc0a0b972edd276ccca546217f1e82672405959ab5fa. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:43:02Z), 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/QZFZ42592226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c35679bb435550c10f2fadec4a545fa67a6bd8767cf862043815eeb5c207e8c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHN82566167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64cf81319115014b072416c67924576518ab5eec5f8a3fd931a9dd60be481dbe. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZK6H2521285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718b6987b4cfe9343d685a9ca12a85cf88a8376be532b37d1b20ef811a5bfdb7. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZTB52568074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d580ff529966bd283c8b94f9243027a551a9e230a3f1fadd148c352847f3e0. 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/QZTPX2532452.