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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8a9aa3238bd00baf836410a074837314d3b5191c7578fef471dfce203c7680. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USYLM2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1501ea27cb2f29b759ace472a2791c7e50fa653d32838f16c7476af36ae6c19b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKACT2230432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57bd7450d02aabf58d413bf0aba3335c5a0d12893c05ce90aea34e556a0a2d8. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/UKACT2230433.
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 0xd8a1635c8543d1482063c41c1adc4c2cf65359ebd7d96d10deda429d154d3fa4. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/UKACT2230434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b73657435e41ab751d4fd9e0fb71656bb782912d3169fe406b0cf25a4eae68. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/UKACT2230435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f69b3fcc5bcc0fc492399cd52613a6f8d201a08c168b57f7398c38547779a0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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 0x4df9de628eec7a0e3f50bc14ca4bcafa3c00235c99259a73237b01cf37bc3a85. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEH742420075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591cc1a732c2158c4e6a050eae2006dc30b68ab2ff66504cac280c8282b235ef. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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 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/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 953528 (2026-06-13T15:41:10Z), 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 0xdd301a7e2c6f08a377ebdc57cfa3ccf717c0a0d7e5a106380c8204440d9c6ed4. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GXCM22400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe21a4edab940a2a56e12be1ff028298a9a0deba927cd376fcf3882382452398. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GXCM22400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bff16c9689cda8f02dc8300c94d382ee1785f5f628db7b725cac2b6d0a742e2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/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 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/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 0x389dbb19a729db29083d046d3a6966569259c2194be1fa2ff348edd6c56cfcf5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NL8RL2324523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0dba87220bce734044780406cabbb61389cf26990aba5d70c4227856f8f64a. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/NL8RL2324524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefcba122cda2b0acbe866270f9042b2c421c1c446f6a4fb6d6ec95a48e252e09. 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/UKACT2331255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546a3a35f3df98f30356799e8305cbd637dd7e233be267f045150721aaebd4f5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UKACT2331256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd691dd473716c4221bb0996fc0b26f33f6902fc4a12fe6465b26ce1caac82478. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/UKACT2331257.
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 0xdbc666b962d155aedac75c1485db14016bc690a77b38c3d2180a666905428aad. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEPI82201042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45dabd9727034d9854d0ca09830086a26033ec7c8b01cace4998a743f8b00ea1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEPI82201043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e54dc6e4a8fbff98c8cd04fee616f96ffa47171ad3f3a420d867452add1e4e. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEPI82201041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef9baa83ec9318b631314d60a55ae5df12ef1598cff7b09105192c06c55a946. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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 953528 (2026-06-13T15:41:10Z), 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.