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 0x39c0f2ced5ed9b6fcfa51d946454f3f5f01e84bf3a8e7d42ae90b3d896e36847. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b75d95fc-ffa0-497e-890d-74bc473bb219.json and https://artists.proofprofile.net/proofs/artist/b75d95fc-ffa0-497e-890d-74bc473bb219.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 0x402059313f843fb8fe59723339e97201fb46d736c5ca248b75258a115a546014. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/JPKI00400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851709515909e399c99fe005c79702443c819c104a82dedeb18629f89d7c50f9. 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/JPKI09851100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ec9b32dca8cf7a9e70bf2beeb1025f1b30f3923b702be57b8cce2f852b0667. 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/JPA302400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e46d57115ede6abc4bd74b66d7d86e30093130fd043881ace54acd489b4f2e2. 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/JPA302400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0ef6b2a9c423e1cf2b1ffc5fa924b82dfd9b5412d90bbb18cb2744cf1fd362. 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/JPA302400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3721758cbce575d0f390152cbbd6e01b0b0aa9b8039d13064912bab0f8789085. 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/JPA302400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3b1937e434637fd39464d34e2b460a821d9a7ac32d49037b9fbd565bb6004c. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/JPA302400021.
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 0x03f05d31102000249d2bbe9fbc28fdee42c96e360f8627391f6e72d0bad0dd7c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/JPA302400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4557300668f22c90329c680d3de3709c66a5c5b847c0ae22b7b220e42bd65c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/JPA302400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e76c0919055b0feb67048ea6a63cebfb79e4ca9ff618f9cfddde818e0f4ccc. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/JPA302400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86186661d58d0fef72933ae3625f0b874866c62d9f9a0bf8a07b1348f9cb7eab. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/JPA302400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f3b3656901d37354bc4199e292316857e82b89ebf66785b9e36a8768db6650. 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/JPA302400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9edd0a8be21e7cf55f413f23aeb03d877caa32706860a59cbe57a2645d837d01. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/JPA302400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f26ca3e1cd92bcb082a7d4356eb54c13828ee53798fd539fa35e079be10e3b6. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/JPA302400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31af1f10aa6ea17f5ac642a6d240cf776846654700f1ec560bf59312fcaf4986. 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/JPCR09215500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f2c565f7077fd6ec706ae5be5efc391fc272f1f7e0647c9f26d17860c81a86. 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/JPCR09215510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2625848f196188ffeb68f90e38bf90b3987ea5c5b0e1a3818b2df2fb0616e505. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/JPCR09215530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46087beb344bb98df237b935a805cdbfc846263034ff2e90922690765e34c34. 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/JPCR09215540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b33eceb577edff00732bb254318fb30a5d4ba0338ce8b82f9f29cde247f77a. 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/JPCR09215560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92990d38a4309f19127906f790572c4c95ec3d27cf4a023d681f9c011d91c721. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/JPCR09215550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a8fbdd83c5078db0b2ecf7522688f86bffa5f460c2507279349af2f725762d. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/JPCR09215520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a892c112f46aee88a32fbe18f94568bb5159ac8ccf6774e92144a62b6b5eaa. 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/JPCR09215570.