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 0x9cb4c538c37d394d0aa88f361f1e971733fcebba067bbc49a94d6447b86e9c2e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6aaf284e-eb79-4f11-b660-e020ca47dc01.json and https://artists.proofprofile.net/proofs/artist/6aaf284e-eb79-4f11-b660-e020ca47dc01.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 0xd508b4834c3648b193e88134cfa7e0c299e547acfb8c16277f77a147014553d8. 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/TCAJF2551860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2545afd1942be93a6eb3fb0146c766b9f9ce454c056a99164a49a2a5337e35. 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/TCAJF2551863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36edab22e5723e1ccbdef2a4e0b8f7034f1a419b0b5d0d6a39d1822deddc8aa2. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCAJF2551892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7727faed472e5be9f5ba2b5bd2bb23b73325d9aa22993a6520c570abb63f10. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:40:23Z), 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/TCAJF2551898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6889dfc9983269a803b40f45d3b2df8a5852c6a54b667b0128bf59d0b626cd5e. 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/TCAJF2551910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705f4f807981ccd4322f214fe48c26537bf9e707f182c0dfcfffb66a68873d9e. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAJF2551918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd256cee83b304c767af1d0f08c06719da020f2615089a9ee4bdd5ed13505bd1. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T04:59:43Z), 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/TCAJF2551922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b46b6d165c83d7565e82fbeb1585e38bc12c4314c120ea9b991ee3ea78116d1. 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/TCAJF2551931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69bc77db66ed39a409e4d595164b1afda56c2cfab55a8f0896af7d36b5247bc3. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:41:19Z), 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/TCAJF2551940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4792e25e69e77835423d406723c4a3d78b7f728b9b186bd3c58c0dc7f14170. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAJF2551953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59f45d2c3e3d755cb26c28fe6a31adaa04f6c04bbf41ed3fb965ed0050ab75e. 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/TCAJF2551962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a66e9cdec7052a27d59eaafdd2f79d4c989d58a4e7718a612111751b7ab1533. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAJF2551971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43901d8bb3a9c6057b31b7e527e6f2254a3f1149be585127d4501004defc9fcc. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAJF2551978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2ff29565eabafd05a1c02fc2626df185ed39d3452444ffc17599ab03b26ed4. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCAJI2529923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16271ac72c911302cf326c6f07569dc6663f515c692a47b0b8ad12c8fa412a36. 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/TCAJH2529935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846b4c0a4205b74ad84b9cb6cb2c64f5406bba4f28c8961b7a473501691020f9. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/TCAJH2529943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0189e1e69aaf6bb427c1b76133df3c68ac69ce336a423bd5e44fb3d9d5e0da14. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAJH2529949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec84e24dd58f3fd2aa4d5369126bc8300a19d4208754e9ff086be41f4a92ba2e. 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/TCAJH2529967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8afda40613136916df2e8fbec62e1dbc21023627a5dccf60659cde1aa9a8090. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAJH2529979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e4a049674b53706271b6ef1d411b6315f6822a8aa67010cf5f5fb7174f68d8. 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/TCAJH2529989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83ddefa6c4eef4d549d0658568a968b90069c94dfe039d3423065affe21eeed. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAJH2529998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbce1badfb488d4fb937a12f429a1e80ab3749ecb27790eed41bc2feb01259d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAJH2530006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf5986dba5940253437210feb117a040c2ec4c07b838945d8cfe3fb1052234c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:10:56Z), 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/TCAJH2530017.