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 0xb749d0eb9ef22c4788f50649e6594a78a40fff549c44c2c5767a208160d2956d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/79bf5746-2aff-4d8a-9a83-aed201e61fed.json and https://artists.proofprofile.net/proofs/artist/79bf5746-2aff-4d8a-9a83-aed201e61fed.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 0xb4fc13d49e9c5154cc22b5b908cb4f5360297211d2ece4a686f63c23b96a8af2. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:30:24Z), 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/QZZ7Q2581412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4407ab81a8b3d1814d9033b8c6bde5f501fbaa48c3665ce09c7eb00078175c51. 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/QZZ7Q2586837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d9dcd2b855fb9d47796181c1f6e4883d6b8db9855741de8554f2b1337c3acc. 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/QZZ7R2500384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57cfb41091b45fcc8d4aa9ec57f28a8bb15d94df79e27908f1721b3984c7af3. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZZ7Q2579813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149d72c23de204fd25121e8ce0cee66e40fe1b63921b6546030567e9926f6263. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZZ7Q2581393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc818495e75f73404abba022e0da5e9f8a8495e72de6b2da0a548620b9d4fb88. 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/QZZ7R2503218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe390676d3e7aeeca6dca9ac52b10e7e1cf3be4475be25d402b2c96e9dcde129b. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZZ7R2503219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6891306d0b40cc42cd0232b9a6a6b70934acf7c1c46d6d7bb113960f4f4f1d. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZZ7R2503221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85663dbd133d97a0bb2e3ab697a0f63ebbf09d066f577ab784e57185209b4a9b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZZ7R2535160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb301a392edffda1fbb9381d4a9552331b90c8ef33acb227e4c0abba307d1060. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZZ7R2554754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfcef4dc2bf3bd518c6e84ac9331e80d0fa8fdafe549a324f2884c5d484ea554. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZZ7R2533339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f55db2f4b47f1657a46a4a26baed2b168b927c8d4d2f420657b451e44cfabd. 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/QZZ7R2535156.