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 0xd35181c53a4b769584113bdaa3f8d73ced31da34c6b049e5c12092d13fd7634d. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4183ff89-247e-41de-b12e-35cdfd5be4d8.json and https://artists.proofprofile.net/proofs/artist/4183ff89-247e-41de-b12e-35cdfd5be4d8.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 0x38201dc907b758c932823ab1e3b8f7271a3f501f0d1cd2d24c0c4df1d46db510. 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/QZHNC1916875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9958f2f37a74ac5ea028497b621bf152ad4c1a0a48791df908ce71d661aa66. 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/QZHN32123200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca187905dc1becf43ff767560000736d35529c465f4642fc1a589a90596bfd76. 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/QZHN72121218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40458bfe8cffcf5d50292a200f8c82b56fd307edbf8209c1f6b2979473c6120. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QZHN72121219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19973a5a8805fc0dba2369e09bb5901174dc901dd9b0e1bf4594e6415a503367. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:44:13Z), 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/QZHN72121221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55aa178376361cbdb004b26304c8f9b6c70b550292f7a762f8d8c27a9126927. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZHN72121222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cebec23dd309e4af6ada81b30592b82459380999dff4078231c17fc162d145c. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:26:09Z), 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/QZHN72121224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44be59fbb9c12948c2156be070cbceada5c936e6cd0590b6ec15b14ef62865a4. 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/QZHN72121225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e78dc4d12deebd2988e81c687ce9aa0a3ddd73f92150265ba7940bcac3cb4e. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:21:16Z), 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/QZHN72121226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b09392179ea72c23aeaf137948b2266422b0939ed7d5799e1833f3c192e4d0. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZHN72121227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7ace0161b7643591c6f122270e3665a8b0e2675c4eb8902ee7bc2c940b0bfd. 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/QZHN72121228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230547a18d08ef2d15104dffbcdf7bf29f0d171b6341c15670f1aaa8ba9e914a. 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/QZHN72121229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85d185ae72e1bbbdee500001176c24240a1cca6cdb47b96fbfdeb0a28866d68. 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/QZHN72121231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67fc60e486f0e1b246235911d5f3be733e586a30f8af543d4954164f21d3f7e3. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:34:52Z), 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/QZHN72121232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83c7cb58ca14befefe7753398eb13a3388b80ca9958569f956f9dadd970748d. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:40:06Z), 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/QZHN72121233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909e9aa0c49bcacf92ab092f33fb41ef4c1a5cceb6141f63f1e2e609e8776375. 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/QZK6L2192106.