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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1395ac783dfc411a189a4a2d8716ed364c83471c5f0fa1a6e58697095632dc5a. 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/b36a1d51-860b-4eef-a2d6-3ef1d236cd2a.json and https://artists.proofprofile.net/proofs/artist/b36a1d51-860b-4eef-a2d6-3ef1d236cd2a.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f69b3fcc5bcc0fc492399cd52613a6f8d201a08c168b57f7398c38547779a0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEPX42200560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121905ca73d1f21ce7aed798081927ad7f3531d3a5bec51b182b788d70be3031. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEPX42200562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4c2924fd6c6511e186fca184e42b1c7379d003d05dbc01f274a375c113eff3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEH742420074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3927a3c2ca8122a7a94254ab7a0b7e44260716ed38a268380ecbf8d491398b63. 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/DEH742420076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591cc1a732c2158c4e6a050eae2006dc30b68ab2ff66504cac280c8282b235ef. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKQU2451999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1190ba52d404bccc1fe8d6ba4842cf46777b28380a5b433ed064c924a91a35d0. 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/GBKQU2452000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1962aed5a6fad9a1a5ed38e6232e8b7b10768616b50524260bee0ebe83d8d51. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ITFGO2400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f84c40f3bcf7c004d83603b1ff380b2bed1eeba7323b95c866870119ff2c04. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GXCM22400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bff16c9689cda8f02dc8300c94d382ee1785f5f628db7b725cac2b6d0a742e2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BXBK62400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae889497568c032e41c884f1b0bcbe688d27fc0755f8fbfa9c271232abec72e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USA2P2356679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813e9b54a13d7142e3ab02be1bbd5e25903116c630e4e4d2d2ec19756205fe0f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR6NC2330670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981d45ae3b668a44b725356c24ba293e04a5a01bf1626168e5f1940e0ee1fbfc. 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/NL8RL2324521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3d6c89a6f0e794ad361d46eb7c58b880bafb09a8b424f09034b50273b4a07a. 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/NL8RL2324522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefcba122cda2b0acbe866270f9042b2c421c1c446f6a4fb6d6ec95a48e252e09. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/UKACT2331255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161518a7f87929c3c30ac9915107a10561730313880c1b7bd7961e9103adf785. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ITS492200602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef9baa83ec9318b631314d60a55ae5df12ef1598cff7b09105192c06c55a946. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ITS492100601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae40b719e7c0114adbc4e24afd92b46a1c4d89dfd1031918d7b5fce73268386. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEEC32000140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd3afe626c94dfddb0abe1b9202b9b0ec83f6bfb87980915088cc0a281d4cd4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEEC32000141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85c9eda6bda52a821a9cb0b5e09d50b9820a19c17815c0a0c173c4bf7b69eeb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEEC32000142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c58e85e871385863471023e5123c037140f90a027a3fd767693a1f47e4e7f7d. 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/DEEC32000143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3088939a6e10440456e2e578d875c35831cff6747d7359b8c0a39e8a4bb04801. 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/DEEC32000144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a99e7431de29f07edcf9737956fbf6587955073e34dea77ad00066b5e7ea5b4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEEC32000145.