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 0x97a4110b197deb7ec0513e91cc15c3e00671eced01796035a47de0bed43e8ca1. 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/38874b1c-a010-4f88-b6b5-8719d5c3b2a9.json and https://artists.proofprofile.net/proofs/artist/38874b1c-a010-4f88-b6b5-8719d5c3b2a9.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 0x45b288378ce58a9345602a93afb625e138edbb692736f44b4ba18759d5c85045. 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/ES71G2335379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044a75c69189fc9655c605210ba587ca1bd7871acbc3c87d4d6c9fa233f35fa4. 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/ESUM72302371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a6d275006143857aa30c71c723d63cc6067b8b1165ffa599e641b9cd91519c. 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/ES5152100793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91be6f4ca2cab9c57c61fdba11bfce9a3305d1af150747746be1deea0421ec2f. 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/ES71G2401239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17bd9914baf29b2df173c8b68de1c789720dd9a6ef41e133d8ea377665e99e3. 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/GBLPF6691575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7046e761dfd89a5bd805b721d9149e29e076b1a6feda306e94daba955f836268. 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/ES71G2321262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327a266a35446bfc5ec45de0fa0fe8b6fa36b30bf58dfe74b3f1ce199c420cc0. 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/ES31G2100701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e2a12a62f416b84cb4c38b24d0fe2c163191d830dbf69db249c64d4f1e54ae. 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/ES5152200223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863ebe33bc639ce3531daad3024c162355ce17f0678706fdd65aec7cc0341236. 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/QM4TW2325849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e533b79e66dac94755a2b55950def3ff6f34a64fb9810511382740f85c12bb. 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/QMDA62184710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b218f587edcaf123f911d1647baa3524a733e5bc6c612b6d12bbbd79e15017b. 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/QM4TW2165197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b255ac6dc5c8ea6622d19162f09c74b0084871c4166cf2cfa8e69decfb3a3a. 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/QMFME2098746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732c4f206f569780afa8942fbf15631e7c76148d0e4dac865860b45d062330a7. 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/QMFME2008294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4d140662cd711eba4545d94790dd056154afa1030a8899e4602a623a5e8283. 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/QM4TX2129472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd852ec2c7f7d18aeef0d2697da620f0f7d17e767f42596d4aaf4dbac68b359a8. 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/QMFME2055307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f7d1653149b327e3c9a0f210001bc4a94e445854a8f5de7222f24872b0659a. 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/QMFME2055209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8731a91d7b7b47b548d8b0f81c2d6f1e9525d7f93419d9b9cce24f9d160aff98. 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/QM6P42105655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b443e8ab1c52dcc5dd0a1b20f22442545f6fa928e74368196c5124344e773d. 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/QMBZ92185434.