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 0xa14d95f28af0f69163e47af1b0ce2dd064cda3e3638045e257fc229c035fdf22. 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/dec29027-54da-4ea1-8013-26f7d1ac0d3c.json and https://artists.proofprofile.net/proofs/artist/dec29027-54da-4ea1-8013-26f7d1ac0d3c.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 0xdc7503b5a11ef54b208aecaa4ed795a9661f71420e8105f792acec1a09941079. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/ITS041900473.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca19158c776ea314d38034020d1d0746d9216ad19471a9ddf0f9f313666a26b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:17:29Z), 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/ITS041900484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fa8870ad669617f9ba0db368ccb9203ecb5a71c5580909fedd375a5b0b569d. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:10:21Z), 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/ITS041900485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa377326db1559604e4baab31985420aeb8bd96255b0520d39722d5fa0d1b37a8. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:08:08Z), 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/ITS041900845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf888925ebbca17db04063b437e95184e0dbf82413281bf4ffa1b9342b7687d5. 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/ITS041900488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc741e12e8a959ffdaf6922cbb66d503da8dc47e952b933152832080679295af. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/ITS041900476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99370ff67bea04924c12d5483cfe76fa3274cdc7cec2c32c6999a2dc62419369. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:08:15Z), 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/ITS041900474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c24694f1fe66fbcbd77b832f11f54255e32e7b2a23f9f31e7ae496af39a1ef. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:02:41Z), 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/ITS041900470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cff7ecbcc081b9f3a447cbbedf9ef6ed09f559624fd400fb6e8b8d4e0893b9d. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/ITS041900477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ded020b27fd1c2c23ad125440a7fdc744b4bed9c2925d05415650b9c9d3162. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:33:55Z), 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/ITS041900475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c1583c96793547a1ef59f560587a0e72d8f30a03c8da9bd383974cd01df64e. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:10:10Z), 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/ITS042000271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc695d07bea1fa1626f2d695a2ea8a17dc31237635a4dab3004393bf1c5af2754. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T17:24:29Z), 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/ITS042000246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee20f8317da147ff2bf562ac99104ce74802051c4052978b1c4843897206789f. 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/ITS042200115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26386d139c1af991baf576fa1209bf2543275efa68c2623e31a1c612425b83f8. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:44:33Z), 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/ITS042200001.
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