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 0xbf175b530f17c80239d378a4bf1af3693acede053dc0d4760db4474ea08ad1fe. 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/ac1c84cf-5a54-4563-ac3c-edc6dbdb0d0c.json and https://artists.proofprofile.net/proofs/artist/ac1c84cf-5a54-4563-ac3c-edc6dbdb0d0c.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 0x1d57e226869d2e4e020a32670edc62210be18de9b18e16de5335973b940f4e1b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/HKF090900273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9821233bafe469d460f7ce1c923ba0b4dee0eae339c95a73451a7e8482e12120. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/HKJ641700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52834f57326deb28ed4f95caacfaccdba9db7e2c4fb97e1ca00c7a7021df32d7. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:44:24Z), 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/HKJ641800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7685f37e7104a60f13405a53c70edbc528104cfc8f1ff39b29d2475dde6de8. 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/TWCC32121141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba95a27c383875402d6c1d9caea929bafe3244b65ced5f969f7eecb8cf132b6. 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/TWCC32201040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea649bbf4054c40670c717aea57b9e3b40c80c551db5ba2870885f2910a539b5. 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/TWCC32201041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f47bdc50eab41016c238f9cc0127b1725a79f096e5399ed6b909e0df103fd04. 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/TWCC32201042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f321e4ecffde5eb5e073058d25c912c9345cd790b34c1b2cb3db2f37ad8234b. 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/TWCC32201044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afeb264a67f2421517448b7511cb731f7b200c47f6d4cf6ea1eca7a9dbbe3c1. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/HKC652200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f642493ec330c26a89a9f1b821483fda013907fc8682f19a8b82bcd40f6231. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:10:59Z), 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/HKC652300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afeb264a67f2421517448b7511cb731f7b200c47f6d4cf6ea1eca7a9dbbe3c1. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/HKC652200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc05b7907878433d663e59944436100946882f2e2700f0bbec045651e9ed67f8. 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/HKC652300115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f373172c2d1c7eebeef82c8c6629a14e89c2303f5bb5f5c6c06a48f5083121. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:42:04Z), 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/HKC652400188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56fea03c7b92f43bb27ff2f426e40e62896eeee8a182ef79b7daeee5df25e658. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/HKC652400266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79463da26fa1b40072548479f6eca4803947b311ee3573ec30527c6d080d2b10. 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/HKC652400137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2dab3bc8a6d0379d5e7d65b1ef6622308eb6c8bfc6d5ab178089448d936d9f. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:05:22Z), 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/HKC652500522.