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 0x53bce478d9a9c6755f53cb32055e203956eb45186f588e38bcdf8b86a0eb3a35. 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/46501479-d931-49ae-8d01-7438d45a94a7.json and https://artists.proofprofile.net/proofs/artist/46501479-d931-49ae-8d01-7438d45a94a7.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 0x411273eed900e437ead8295276985216e4f41eb74aa2e755527e0e3650b7a512. 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/US7VG2367149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8801f948cb5f1853a80dd07c1f11fd40c5c1c64fe4407385b7921912a05f8b4. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZNJX2471250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9915b2b04c3a5670bc079b1c3eddc5783c300c3fb77874bed56332e63e290ba0. 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/UYB282311004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9531271776f28bddb6d345d5442329d125195ba6785abd0998baad29d73dbdbf. 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/QMFMF2130706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23887b2c033e14e4e7a1fea5c4e9dbfddd2c1a531bd4976de4b7817dc3965e1e. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QMDA61810886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52db0548fbf3f2c96b073bd720166f24dec125285f14bb4ef574135ea8d5ad89. 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/QMDA61810887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e140ae2c8d58ab67ff9abf533a417fd60a3772d470fe8ec925cd81460c261ff. 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/QMDA61810888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e6d034bca786d857cfe9960b43800ba7e197d36fe5f7c3a8594c80063b1093. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QMDA61810889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80771860638af7375ea1a835d6c557647a17963aa0e5fe4bf13c6843ee00decd. 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/QMDA61810890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc498922ece848f36f47809797e70136395bd94f84f4373878d1bc8a1153222e8. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QMDA61810891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3684c680e1735806b5441c23750646ec46daf1bd6bdb7986e5eb0910d73aa6cd. 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/QMDA61810892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a54c678f3427ba48879d862aa9031a2de0ae997e8814884701c26c91ed5d4e4. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QMDA61810893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabdd0c419dde9f8d76e0ab7e040676d10a5b31dc74fa4eac7f1a3ceec46c91b3. 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/QMDA61810894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45541d933ad0ffa202f2f4c3d9deb824a3a1e78cd38c3c071df9366a4c4267f1. 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/QMDA61810895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46cda7eb7b50ae378cbf4dd0b3875085c9d28914e6e76be8eea1ac5acb692909. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QMDA61810896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de5af1fe404cd909220408b27b8be72fafa630aded789dfc7d728c67e3a6ee4. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/QMDA61810897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d55a532952f0bde7a1ea43c9556dc9976d9e715e194c0818457a38d9544fb8. 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/QMDA61810898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c8ad4f1abb76e74ff77b57f6d6b4aa65902e4db95acb505b95ddaa5f3110c6. 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/QMDA61810899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9531271776f28bddb6d345d5442329d125195ba6785abd0998baad29d73dbdbf. 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/QMFMF2130706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6853a1f0e2883d6b838d04cb0fac6d6deb182cd5bb52ae3b9a42aea73faee150. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QMDA61811146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c145253d617071154fe08e2a8d174b12bbfcde813cd29e3bf94aa01708dbe31. 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/QZW9K2215209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8cda10d89966a422da7833d4126b4b5470258434356c26edfa6f5971bf7a118. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/QZW9K2215213.