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 0x97243d5097b2332b2288b8968fee91724949961721963c49a8df9fdbda6d462a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9965ddfa-ad71-4dcc-9e86-46c9e7b0aa5b.json and https://artists.proofprofile.net/proofs/artist/9965ddfa-ad71-4dcc-9e86-46c9e7b0aa5b.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 0xf9ef86a6886d4e50a1c59eafdce375c437632c49d644fa7fb41eeeef93cb1add. 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/QZMEM2092234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5bb323562626392ca198e19ab22b3b8b74408d378662d161b1284c58f2b8cb. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:48:28Z), 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/QZMEM2092239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5478ed70123073f17363819777daa777a89d7e225e460d26f24b07af5c1dfc3f. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZMEM2097052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51fd8706a2e042f2b9addee9c3ffb78329798b87742affd2e7a103abdde07ff. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZMEM2097053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe2c5c7693ba0d3b3d7e0464fccc2c4f6ebf88c656c4ab27f3f2382b5af803c. 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/QZMEM2097054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779759740998b1d155d6fce735a73e54672e50663d754e86ab8dd15305bd43f0. 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/QZMEM2097055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414b47090b0b4e94ab9cb15d58645065e51f285397c1df8f940be078b91292c8. 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/QZMEM2097056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb893dded4c6c90d15584a1248c63bd0c39624806d896927a8e5b6793a11604cc. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZMEM2097057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0706c8c00bc40758c63ba6b3916865714e473e3bcc847c72a0b7b5ce1a5762. 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/QZMEM2097059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd8a90ae526c1cd02672fa30ed547d254b879b32b5e7769e33269da9efe952f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZMEM2097060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cc535360fc8133e06f6ac9a2fc4cc47032e4c05fd45b00fcbb90067e2118c1. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZMEM2097061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5e182738649b78f6cd74090668afcd4089aa9024a59eb6024dd1d21906a452. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:43:40Z), 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/QZFYZ2154334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea04c7d49994cb2b330245ebbf46169542dfed73abae4667e616206fc1e2d09. 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/QZFYZ2154335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba481f80905fadf12f364a870fcdd7baafdcc7eca34b8da53b21253698aab88. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZFYZ2154336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a92a330f56d3fe0cbd9e0f362f638c4b56d3c43700474ea07c94b2e9271095. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:03:24Z), 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/QZFYZ2154339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe016958da914d12f46463fca31f439c375e51cd343206c0cf745f5af79a15f52. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZFYZ2154341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7689a2fedb5debb8bd9354c4c9f477440937f09c9b7f713cf49a674ece6fef4. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZHN92396461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bff628ece2d7de7b2c2149a281f4aace15bcabd3fe43200c5b1533e34f4f174. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZHN92396462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6427dc14135e2ca602fcc881221cf8000c69691c21f3b25ed77ba4a3f3ba8109. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFYX2549024.