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 0xe19fb5f6bc22400be3668feb5c3de26218b323854fada450595e9c8f93632893. 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/032bafd5-ad47-47d2-9c50-3f653f582f36.json and https://artists.proofprofile.net/proofs/artist/032bafd5-ad47-47d2-9c50-3f653f582f36.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 0x0bd904dae7a1c32dc554564bd6712367f408a4fd539a9aaa81b6e61d328e0bad. 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/DETB41500763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9ce3de33f13afa41c10035a41c3f10c0630251f1a79daca984d12529ef7c2d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DETB41500746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3da1ef24b662405a2c0e6c0c06db27b5c821a58ee5a9f7d89467269b94295c. 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/DETB41500766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81c59aa74c439119de818f3794076f12bf2e1a38385357617f943c9c3fcbc1a. 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/DETB41500769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7358528e80dd1f6b551e73a3e5595a3455955196b35b918cc907450193a955. 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/DETB41500772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c014629078c8ae2cf9404c847d6bed6358b6d3bbd77d1662c80d35081141117. 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/DETB41500773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a795d5e89f6cdfd08b8bf69a24f4c9ee931613dc1aed99a1075a1cbce79a3e0. Chain 2 (Bitcoin): anchored in block 960223 (2026-07-30T07:51:46Z), 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/DETB41500764.
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 0x68ac18d421e336489cedd2ab3f1cb8f5ee35acd1d6044de4bbd32751aeb30b81. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DETB41500765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc1ccdc1175267209b1bcb709b54938fe57ae0cbe5d3c3b5a8f5afc88f6e930. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DETB41500767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfb3d2960a1afa5c518610d985713d4cb7d4f42abd209eed2a036c2d24dfbd0. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/DETB41500768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc757a5233a7674c7f01db4fe4dac5fe518a5e067ba9317da12f968f62a9b89ac. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DETB41500770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994dfed4dbb99cb96ef2f81415f52a5ecbe9794ac9f7d728d47049f896871181. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DETB41500771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed90e8e16330026f8ff0dc49e8ef562689a250c4de534b2849130fc093620a63. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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/DETB41500774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400afc811fd642b146f75876abf0d60eb400d04d9a77f08e8a07b9de8f9f7113. 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/TCADW1858713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc78e69ff0f71343012bc8114a667768885b93aafd1aff87031faa2cde579ea7. 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/TCADW1858718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10c203f258111bf3642105719b7750ab7d3f2d1888fc2cc175a5df5e3d84806. 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/TCADW1858720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ea80939738e93c26c8ae9909636ae0341f181f9d8f372527a86c4ae46f5523. 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/TCADW1858721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a471e0c847f2904169e1e73ea626e1a36ee7cb42341c083bcf5802c8d6fb765. 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/TCADW1858722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6db8033d108ce0daed1c7aa064f35b30f6b0e4613d271208547ac11b5ffbe3. 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/TCADW1858724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696a4cd0abc02adc147e0fe6d3471143a8db748c6d44ca0fbf739432f629cf44. 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/TCADW1858728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18f62d55abaabab9301066ac780ae984318f40cf82543ea151c16c2f34cbe02. 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/TCADW1858730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0252fc5df6db75fdacb80ab1670930e88f5bd02ddcfb86dabe8754bdd4993374. 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/TCADW1858731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50f6dfc1a8d216a410647180317f23b10d6d696f59671143a2d4561cd962bb3. 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/TCADW1858733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b13cd69a157156da4961b9bf2e18aa85e330c665522e18cf4d6eaea93d0361. 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/TCADW1858726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c27d3c20db9e9f1dd23bf444ba9312662d00274ab3c2e488aab4469eba3feb0. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/TCADW1858735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39551851eac3a60ed49899a167393b5137d32e9b04a0f23b941d3f2170da800a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAHT2304476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518a2b280649f4eb72d599837271455925c6300f4f6ec90c27be45c1fab815f1. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/TCAHT2304480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9647b5badd01142ce73853fa39ed7692318c447315faf24dc92ec39ca312eae3. 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/TCAHT2304467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b20df028af9e4b573c0fb57b8359b45f6e0f6a77255a27d8b85567772203cb9. 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/TCAHT2304486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311afdfbddf5cf45600fc3b62aedab6a20cd044e3c8167a60afd284359b590dc. 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/TCAHG2333961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb63f10720d452f21b09ca1dac19164173171af7ab8aee8dacebc636f3c546cd. 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/TCAEN1904691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cef8172b353fe94606e84fff586a1a6247d604fce60c1084befd59e7462fa9. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/TCAEN1904697.