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 0xba820a1b8b85561e8e7813d3201c7c7f91f1321ddd9f42cf230acca033c7056f. 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/0e744d6b-6ddc-4ad3-9c00-5b0051e77a38.json and https://artists.proofprofile.net/proofs/artist/0e744d6b-6ddc-4ad3-9c00-5b0051e77a38.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 0x8863aa5ef461d83bc3231b139045c7ca8d3cd2dc106ff52885a32241e9bf0db8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BCKZZ2400137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b96f0fb0c5a2bd843a24c928866addba9e4b8ff5d55633085577d3298a13b1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BCKZZ2400113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9b37915a9fccddf4410573af03e5690059d4bd35d1753644f9653d9ad3a3ee. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BCKZZ2400112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662e35e26dab0ac08de7b29bcb51bc16e713fcd9f4702afb223fb2c12adb1814. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMZ92361338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60fbf77064a393a206cb457baf9665f6c919e805dfe062e7ef2c1be22aa1b9d. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BCKZZ2300260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b23fd9089c1cc5908f717cb1297b67149a4b82d9ce9647b78df64d68dc8f685. 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/BCKZZ2300328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf9384b604bdd6cec22326ce4e843bc5add150bdf09a805a2e45b93ee02019e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BCKZZ2300329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10247d518500b3be204917ab8fd85c8177a582e36640a6cd3d21a17ef30ab10. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BCKZZ2300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc457b6f734b6ed706d2e1ecac9ab7ad0278c3da15b60aa782b85ba063131a240. 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/BCKZZ2300092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352b699321da9d83b99ace28f4d61ff9c290a1ebd2df640199c12ce5f6be2862. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKBE02300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5843ee0a59ecbe637516e2cd3a939d4987229bce380e5acc2b113989fb9ef9ae. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJX2314778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7391d3e9b1a3f070f3bf5cc2f2ffb560eec9fe1ea42295bfd4869ec740d29f55. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BCKZZ2400179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f8c171bf7e03da77759c605c259e2da6190c297a603e71566bf084ed70693e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BX4IU2358282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83999410b7aa677e5f979b1bbf5cd00f29ac1f67304888a4febf715395b4f809. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BCKZZ2300139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b761f6997a228a1ad90575d07afe4ffce8d1fd28890df87ceb909a22ba0b413. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BCKZZ2300141.