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 0x2e812619a904da9682840b82f874b0a48b9b859123e99ebbde9cbad5729138e9. 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/70d27ca8-a3fb-4f48-89ed-a69133c3d7f9.json and https://artists.proofprofile.net/proofs/artist/70d27ca8-a3fb-4f48-89ed-a69133c3d7f9.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 0x518ca54919a3ec1d66eaab2b5b24468bc165f2ef51408367a765c4dbcb7e35b0. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/CAWHO2013307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf460a597c32f3dfe805fe68d0c32211a7a56241d14f0888e5e82c43361fb4b26. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:09:22Z), 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/QZDA72057675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4db89256146c9c436a9520d68986ddeced1abfe9ca586b68f170f552b96d45f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZHN32077308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238a9571b92de13d7dffa8255650cf9e73ef65694f2aeb66a58866f071f1a7e7. 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/QZHN32077309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f71c38917a4543c77521dd1116e88aa6ff34d799e46a74ea7c634c182f448a9. 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/QZHN32077311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b18854f814a5d72a1bae07e78ebd98d90375ca3e92ea83528c7c58627f19c9. 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/QZHN32077312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77085e27ae9b3f946d54ace99f431c33ebe05fa650cb35c72de31cc7c81f898. 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/QZHN32077313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29bb3769acf0c2327bb90f2c754d02969b3faa8f35c3d6d231e1432e663fd40d. 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/QZHN32077314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef31d2088501d34e69dc61c33344c223a78b39542731fba9d333c8d70378c24a. 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/QZHN32077316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b1c9f0fe7c7166e02220f82de52114071d2ca028f16795a5f8d6cd0159dc5e. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:44:47Z), 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/QZNWS2082394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be6bddc088c2a4a77c99e620bd3c2f0eebdf7b07423a4e5e18c36f9fb276dde. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZFYX2149621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4785bb5052a6634ad83cdfd8ce36dd7bf94962fdd661e34d4e9086c595839a0d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZES72102441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ea2eaf9735434e75ea0c2b90903cab10e19aabd032b848e4d2e5e13dae9767. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/QZES72102445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d0039e24551aba90cadd67f8d68e04f6e0b519fd5737b2af2982232638bc15. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZES72102448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b41d9f90b7bb09b54870f3fea3f8f10c6ed86cc186d84487e24b4ea921275fa. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/QZES72102449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b330e66bb8f567bbddc737a3b8d940f5b230bdd4033041445eeff27cf65607. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZES72102452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37f2d7107f86bb0dda836ef6453a6bd158cee9ff1291f154c9baf8fd56f99a7. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZES72102453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5021ad96db322830b826c8a789a90ef5d6eb245a3f2c0ad986841fcf69947f3. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FRX762282370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd577ba4833b0d65443752493141ed723bbf771227f4640081188ea9a79d31851. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZES52322794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1250f86df8db2acc28e1d5ed98dc738cf0e569141e23aa3d1fa44fa8356e9ac5. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:34:33Z), 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/QZTAU2320439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf166c5c691c22a772a271e6082266b57dfbb291d03774aaa1525b1d56aab39. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZK6M2478934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffe5cd3f6ce00219bc57aff3cc4d2a2b9f4e836e7234d9a71eb9b0addbdc47f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZK6M2478935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8edd8d7674fec0b6c34896ea1c60f71f8c66b1e2a7a67e48ef691338cb0807d3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6M2478938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f8259ee1f0a88232680b4890af7ae3ab8ea7dc8385fb20e287d291e79b0fd2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZK6M2478939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7e136f4469b3d6afecd7ad550ac870a6c5aa47140ab48905524b7b1cea63dc. 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/QZTBA2448901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4413b52d6deee8044efa0d53bbd6b7b4c7f5bc00d41a7bb8b768ea6cd3c6cb. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT6EA2586164.