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 0x146a32a49a2064ba5cad0cad86be17ba683e480713ba4007fe317a8db65e55a2. Chain 2 (Bitcoin): anchored in block 954580 (2026-06-20T17:48:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b60e5bc7-3395-434b-90cd-d7aa4b22f0c5.json and https://artists.proofprofile.net/proofs/artist/b60e5bc7-3395-434b-90cd-d7aa4b22f0c5.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 0x7f354baf121375a91b79e0c2ede5796b28f3f650240b4eb4fbcd673c8b3406d7. 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/NZFV12501330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b1e33bcb79590abbfbf126405fdd07612745552e534328be828874bc74e7a0. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/NZFV12501332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbbb7d524c2dc1db62bae3925f35ca6e363646fa98cf0018f00afb5fb21e74ce. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/NZFV12501336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3001b9722de251d6560e8bf19f23fc06bcce68033637a41f70c84f948200c375. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NZFV12501338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2c5cd60624089cdc2c7d1b8a9e4b9c7a73a114592374794e45ccb316bde262. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/NZFV12501355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43357d6c9a8a74c776dcae0b05c71efc58acdc7700f926a12287462f45dc7148. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/NZFV12501354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbcc6c1c35d423ba868dd8fbd49b37c7364db5d86bd08c3c03ca0d58e4311b8a. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/NZFV12501425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b130d306073939ba83295ba86d49c16097d6e3c9bfe3d4aa594b7cda131989b. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/NZFV12501427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6e26f59501b546134e13b15af20a11f86c76ddad044afe26f08930c0b686d8. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:56:05Z), 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/NZFV12501428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f2710477cc83c025de5eb26379f4b53a7506cc2ffd0099ee0231cb2475bbae. 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/NZFV12501429.