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 0xd05890a8381d4893d6fac8dc0a03b7d7ff260aaba64f8c4442ff4d16513f8ab3. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1a7b6e61-d611-4ff0-acb1-48ef8cfb3d8f.json and https://artists.proofprofile.net/proofs/artist/1a7b6e61-d611-4ff0-acb1-48ef8cfb3d8f.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 0xdd9a283213d6f02fa24a51b654475708edeeb610bb8794ef69dd2e4172e8455f. 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/TCABS1383545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cdd6eebb7e3fb337de5610965ffed91c21e5fe9093d39d86bc33fa22caa829c. 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/QZ9Y21702608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00c9d730144eabeb94ac6b46b3a4e385c7991cd934c990b3b73cf7eaec5f770. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZ9Y21702613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86eeb201b41e69fdb43a18ec5ba3a09b88dabc777026ee9c700a7f7fe0c3fea. 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/QM4TX1746879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea25448e0f3fbf09d4987be672e2044d2cb1962d8db2767f07f6e1efc73c99a. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/QZTAS2326940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b76db32425daa009f19d69405fda37a17d05a680f03d6e35b98b07f550b2eb0. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZTAS2326941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24fcece12aabbe98977841faf5ad92f46e71dd674d09df20b2efaa2bf776d05. 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/QZTAS2326943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293fe59081d68b09118b9f3e921c77435b1d5c7b2cf5e07acba054787d6b889d. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/QZTAS2326945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05b747fd8664d39a2ab4a6174e16bd9debe4ac11af23a59a7fe10bdacde1472. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZTAS2327210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18c94106813b11daacda05097604faaf7e293c280142ebe95d67ab19794a330. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZTAS2327211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4180057507be749dc4f5afb747fa28b238fab38d58052a6c37750841d8adf0. 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/QZTAS2327212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0111ec4b9939e304c54706e25b8f82d8df470340e22235fa8e6cd053671c2146. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/QZTAS2327213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572563b4147a2f6c5aa0a3cd7881a70d3f7540ed85bb01ac59ed7e02c6dc65ea. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QZTAS2327215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e11a5368f18b6898a21a76afa3acd97dffd0d19b75c08a080f87bcdf6225c79. 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/JPB671301958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f7d7dda5ba022199d4fe85ff98785b6217cad9363d1e249af0f99d6b15da74. Chain 2 (Bitcoin): anchored in block 960306 (2026-07-30T20:23:53Z), 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/JPB671301960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956dc7dce7f2e79a3a7b3955627a3bc1b93653bc69b5b6d7063aca5150c02b94. 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/QZTAS2300312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8be3f01ab85158e3cd9577b636fc23e00b2998b8fc922dbaad4f77aecffd47. 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/TCABT1488031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5d98cabb5c8bc4e92c9f7c65d60224f916ab146fa08375be9562488af10d4c. 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/TCABT1488032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86193ad4af19fea081b7fc6d1e436650dc579912968717ec2b10bc60bb36444. 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/TCABT1494339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efdb582a74cce32c66c484f8ab8dc3df5ba1651a6e4b2590d42a746e5f75823. 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/TCABT1494348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31506e78ce9364b70de55cd66cd1a28bda7e0067cab7e6d801890ae90998353. 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/TCABT1494350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa48a4e2a6453757ad90f6d69ca1af7d941db906e0300126dab377d05b81a97. 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/TCABT1494351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0814daa1bd09860c3e75408b9158365e52655869046c8078fb039201846178. 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/TCABT1494352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc21288dfe99e68552080c73a5b0ca2990f0e6ed3932f85eb5933ec6c34b889. 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/TCABT1494353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098e6881e300a3b1f257684757204f0fcd1448b3877390d04ca8e0d7fba97cfb. 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/TCABT1494354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da6a46d00cc34a19e8022ac5531f754f8fe91833fffaa5a58dfef321098cece. 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/TCABT1494355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8fe27ce2292375a32271417c2749816c919efc027203eb8219f11ed2389a5d. 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/TCABT1494387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c87edb6cf872dbd698cc7536336488b720704bd2d8b39f90159214f88bd371. 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/TCABT1494388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8185789628a674953c04547a261360b4611a0a7e859eeb6909879173a86f738. 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/DEG931951019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa2d4864464cdc6c6620315ad94743514851e888565b585bfebb512df3f08b7. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DEG931951023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70dba302b087b5df553e18b12052b0c722d77918530a9b5dd17d6aac285e714a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEG931951025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3731da221ef9c8798158d09949d868680e6b683c2d894d2141810e0ae057bc3. 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/DEG931951026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa521ae8f857b17a7ed42bce3ca9ccf09b54e6de51fc710d4e54d4e0e4c697e75. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/US83Z1766900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec3ace713fe621ef92f4e925dff844b5d48e6734bca17a1be87227fa09e2273. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/US83Z1766901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10fca0b1d6e7845bbde4f7c147a584f8d8e5205b95a3743637877822ee578b0c. 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/US83Z1766902.