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 0xfad65bb1f6f2050120287d7ea93c26b7ff5ebb2abdeb624083b2957c4e7460b2. 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/695c7e56-9e35-41b3-a0ce-403aab2ded59.json and https://artists.proofprofile.net/proofs/artist/695c7e56-9e35-41b3-a0ce-403aab2ded59.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 0x700dedf42a04e3382075535e05426672fbb348e01d14d76511f49badadaa603f. 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/US6R21304783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c137e6715e9d44f8bbf42dab3ec96d1fe5752377c72a0a22cf6e0b7e5b7334. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/US6R21304784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f66a5661bff9f540385c7dfe802b35a05da0a1fa09be5781eb7feedb520fde. 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/US6R21304786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e726cec87f4bb6dcceb95f1d300a2ce80c193412822c19461c8dc3df6ea42e. 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/US6R21304788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebfc92dc0787a0428211f58f6c10ca317f58834942a38e31302b6ea180ad4f9f. 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/QM7282494028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33da1a655c0c2cadf1345627d4ae87f5ddc9b9e8c990ca8a3e2f095499704af7. 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/QM7282494029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60dc2da5f08b1434d55fdc87760c4a1e2c18282d3031cfbbd0475c8eb5ab287. 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/QM7282494030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f683ab9f8c0431aec541fd976f3509ff62e5905c82eee4c09b3eb4912de802. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QM7282494031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174bd5b165c4c279aa78516174b28b629aa830eda5c73958245f8abb63f85419. 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/QM7282494032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f095a5af808be49fc1f38edcd117cf9d6347f7f653b58852ccc337f12d247a. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QM7282494033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc751cdde95de67494417b359e8bbe0fa9c769749f142f42d7062acb5ddcfe5. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QM7282494034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c4701367e36f34e8ae182224c9bdce27a35523972f5694c7557e01b4a43774. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM7282494035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c6ac946f28de3a4944b5f8f58375927a213f07107c90f4547f8a93651ef008. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QM7282494036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6cb7cdda24d651f1cb734eb10863a3899d3c97d14cb20fba484fe79e9ae4a3. 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/QM7282494037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a0b85963e6395e27e0059842ab261f3111f963dedd8247c379e053fb39c6aa. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QM7282494038.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53da406e171421550d44d15d917d0f70749d11910ed07f72a8573b0c29145550. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM6XS1704792.