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 0x79e206b640ac376b09d3eff8405ac81d8ddead41c7e79b568994c7ab37a03b47. 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/7e695062-f927-4504-9d14-c15d3daf1b18.json and https://artists.proofprofile.net/proofs/artist/7e695062-f927-4504-9d14-c15d3daf1b18.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 0x43bc26c9900f82aeee3412a2c6aff6f2444dee8fa3cf52b997cd15ceaaf482d5. 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/HKG732277823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270b713a15d3b181af8d50d39e13335ad8fde6a5c89969772d5119528ae7931f. 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/HKG732277825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e56ac7124657982d4fc2cc60f7208d7225c2b9899b263f2f976f165912f1b4f. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/HKG732277843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae8dc1e0c2eaee7d77c0e0260c83f0c685a6157a510bc152c25900a71840994. 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/HKG732411798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510c61668d6af4bf3e2d21472143457598489a3ef907dd72fe07d07f4d8c2f8e. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/HKG732428180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce54b61b606dfb94935c002932c2fa2d243d030453eabd24280b70f91e61841. 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/HKG732402276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd771d5641af1396d532cea9aa2bd929f1b38a368be0118002de8d3c3d85a2fc8. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/HKG731662345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81ddf838155389a40f012a8e53f27ff8a66fa3e19ebc7156f3a1a3847f761e0. 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/HKG731662344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebac2ddafb5fde59e92dc696c7eaa283c104a70e6081d33a80c5284690c93cd7. 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/HKG732329974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3a8d8ee290c7b0fb4277910e16a33e404937e7802b16cbbc9cef42e316ba8f. 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/HKG732329975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66326edf43fc91eb21bb5fb25ac5476b25df57c17cb871867c485a8e9ff4c3ff. 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/HKG732325764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb43b4b24f1f9fbf0872984d7774a79d29a66bb7d4588b9efa572facbc6af693. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/HKG732286202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6401344210d0b445bb0d29e3466bc608be76d1dbf1631be371751a19db569df. 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/HKG732262363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f55130895a84d46332f6a0a4cd431e943cfdc995e03832b734f6bc6da7f6fb. 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/HKG732249920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3601492eb2feabb59aa3cd50d760953eaa8678a1d7259319c4461f9d211303d. 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/HKG732249921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e718ad6422538bfecfcddba7c7e09530cca5b3a16a6d8dc3e99f320d61bd2e. 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/HKG732231429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8927aeed7222880813e90510ddb6ec30f0fa7fc6ae5be21ff82df4097cd632c. 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/HKG732219741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bdd0f40d3e6c75256ce6e3ef903d6eb67a58d0ae1ac8629e00dfc2d6b9b4ab. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/HKG731750394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be841ae591d8d242b7df3df8b96a74dd478e0885ea671de04744fc6e09cbac0. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/HKG732158021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3413da3e964a770b3c87eafb5d9b664a120c88d85276bed233d4f31cb9daa19. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKG732291937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a6434f3de3a138a0d731d3178c93c265254bd9567035ec0cc8cb4e9a0c7531. 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/HKG732022486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f1282bb08f6d4ccf392367c665a9d9253299dffc1eb41c4584aec5c2a47d74. 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/HKD012269158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef4cb749fe99a314e1c0043a5bbafdf11c2ec78a83cab637213b4d31616b9d3. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/HKG732317069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d55a24a04a4070668a976355dfc44fd287303e819670c4aaed7894d8624ac47. 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/HKG732150753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705b13c6023598260bf3a0db76c4a5ad1519fb66b359ad67956e9df42b63377e. 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/HKG732152219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa647c171b0cde91b664dad864b6fdb7dafa4660ac827165f5c38f232dee8740c. 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/HKD012370035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750a413648569b20bea54c9821876935964309d615c43700a5b66179880fbad8. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/HKD012364965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55befc5af2e967b43ce44c9278cc12a629f25b9d76dedcf0e83488c6cd676e1. 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/HKD012364969.