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 0x2618497f93c8b500ff31cbb0d7c019ba4f0aed95604ba795460f702587644ae4. 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/9d4a912b-5fb0-4b1f-b7b2-14124a00c628.json and https://artists.proofprofile.net/proofs/artist/9d4a912b-5fb0-4b1f-b7b2-14124a00c628.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 0xfc4951de48fb681c6e89eb2a52b43e98a3165d26159e15630d487b7b131cc5e3. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZNWW2194842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684d8a0736ced68a2c997bb84f5a43490b89774604300fa91521fc5eef76810d. 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/QZNWW2194843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d38bb246313e207b921e176914dad59cbe352e00211b361e17e00eef10f5054. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/QZNWW2194844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa392793e8dee729fa708dc070070258eb0443bdf92ce62d5cea4b4b4072246b3. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZNWW2194845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8478877198ba6d9fef4638337205720541f560d5b181a11f3e0b50ccc6445d63. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZNWW2194847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ea8f54e1f80243b397fc985a7b9f50690bcece3b7736d8989393fe28450284. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNWW2194848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd0e7429869f5f07e6286ec0367e615994452f6e32cb6ea2f692b0a757339dc. 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/QZNWW2194849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a9e29185346b06c4ced0e0fd6ef98bf50fc775c2ff056d19ef9025f06bd1ac. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZES52267067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21407b0ad09b189cf0aa2fb726b6cd107fd1d0e5f2e59139e06740a665f08299. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZES52267069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21407b0ad09b189cf0aa2fb726b6cd107fd1d0e5f2e59139e06740a665f08299. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZES52267069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d27283ff390ef77a206f06c29f2ddaa186ac6bf8057d646764e8d99375b740. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FRX452466057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186627b9641b358efda1540e26097638b43a37054a3d21c6369f0063df62a0de. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:07:53Z), 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/DGA052428721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdacbfe0c8611f3454237921b1e2f0201b15d7b750f515d558564ee6ed9ce1b8f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZMHL2425667.