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 0xe073f445b357e0a9aed5faf5df6a192be1d132ee1d572bc0880d8877fb371f03. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/59476e5e-31d3-4a20-807e-e8a652f412d8.json and https://artists.proofprofile.net/proofs/artist/59476e5e-31d3-4a20-807e-e8a652f412d8.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 0x3e1cca15d998a96a89a7cfcbc8abc7ce6e2072e06a9c34fd4003efa9010e78c7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMDA72429172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918448ceea4e43ae2198276a9d2a5b1f6ffd36a1eddae68a044a5e057257350d. 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/DGA0S2491615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdd3ed076bea39020b46d663e66aa5ef87167b18ea6f1471c479c897609b113. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:39:24Z), 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/DGA0T2420216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e82bd512c1cb5b2a14429a0b1ea1a13d44ee0baf8b87b0a4e7ab7a300fc369c. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QMFME2487090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc72f7eebef0e8c522ee36fff6ff8d72e9f106e85a847161d043effd27a38870. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMFME2491248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1805ed50f38fadb2122ae8113ecf056ba29694b2ad2a49edf7023e6df674ba. Chain 2 (Bitcoin): anchored in block 957544 (2026-07-11T09:08:48Z), 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/QM4TX2565575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c31c92a58a4d2c6edf9c9a9cecd1736d02085a019388a19c3a95f73714561f. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QM6P42595317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3fbeef597d858545e05b7231fa4525809421494c7551be98415b46668dfeacc. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QMDA62521590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b66206dff7340271772453d5fde9548cc0f521b18dc7524fe3fd42893449d0. 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/QMFME2508289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06713992e154af9a8f1698ed9892e3b95451d6d6992e2ef627f801210e178b7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DGA082202333.