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 0x472133a23a9ca24315a58704587fac554872973a9ab6c045d252302bbf22e937. 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/2cf0dadf-7d04-43ee-ba6c-1cf2e1c103da.json and https://artists.proofprofile.net/proofs/artist/2cf0dadf-7d04-43ee-ba6c-1cf2e1c103da.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 0xc1f70c80243371683fe13010b2301987d7e6226415d330af83f6f3f0d9bf3f4a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CA8R81900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5401e11c4e9c5b4f1039d704f38dab3b855cb196138d011ee642bd355d92940. 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/CA8R82300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2fed2f2a61624bdf51897771218ab85d0a8cd4f9df5f847e8fc096722e4ef73. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CA8R82300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887244a99569bb5683e8272a72876fe709adb8616e81f04f0e3f2356b4d40e67. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:53:05Z), 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/CA8R82200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ea77754e4cc478aec7d0ebe8b03cac955df30742958b499fc9d8ab6196f2e2. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T07:53:51Z), 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/CA8R82300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668f5cfa53e9949ff2fe3cb281231fbfa203cca330c49ccd64740210d35f76a2. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:11:35Z), 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/CA8R82400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebb08805701e4ceb7fac8ec8cf2782bef1b832ea7b7c72c77ce4eda1b48b6a0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CA8R82400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85646b2431df2c07c39e5edd04375e8718786b3cef7c0d178615ffe6666c9312. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/CA8R82400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00bafe53587606c84f5671da8c55a6dd4d30cc5d46504a28392347f8ea0ed98c. 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/CA8R82400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0112097588f01eca2d5df41c33338174b8d7905a7e2041c1209259366b5c9c1f. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/CA8R82400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c493ed218f90f92b8566c1cca7f38e680570dc3d3e21e1ce4c61cc09491e222. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CA8R82400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa421a8913d9ec41bdc8fd762d8e5547c9c592c3c9867c46c493e00343663b0a5. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/CA8R82500004.