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 0x6f707d6b5da2c5cc050cfba1311258a46c26e9903682fbc972f051c9ef9e6f72. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2e987e9d-fd22-47e3-8928-4d3b27f8b6c7.json and https://artists.proofprofile.net/proofs/artist/2e987e9d-fd22-47e3-8928-4d3b27f8b6c7.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 0x23ccf8b6ed7817b9c3eda80b4a5ddcf818e313fcc53caa7af9740a0110950144. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAFI2002680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8078a6cbed697501b13b38a7483cefda6ca6fef5437b5f02057e12aa020bb72. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMEQ2193498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8339ecd82300b962073e19bbcbdc295b3fef9c77af1838bade31eb5f72c54e. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAFW2148488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e77faac1a90c2c8bd40c912b0846275b11d65206b90a54019746ec172baeca. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCAGM2265382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dbe2e1b399f1d39eeeaf86b8cb8fecaf25681a3ef57ca89757b70d9b1f36285. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZNWR2367830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3323af8ce940da05baddc89fbab853e5fc894db424964440716acb3f07fbef. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZWFK2382180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc984aeb98eaef3e12855bf0b019d69c3cdd866bcb7265b21b1281fbf01ae5354. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:26:33Z), 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/QZDA82439906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8726f1ccd9350e20b4866dcef90090bd429aff4c51096e6d8292fc53f7c1d9. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/QZTAS2468643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d50d0fa723e8fc4d581b89e380dc1a5cdded8dc08942487420d336220ce1bd. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZN882226077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548e325854e89594685fa3f5533bc42c6c5a6418ea312dd97a41dc2d5ea6a0f8. 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/UKZGC2305357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee04c60e8b7ef071b84c2d8ba7f3d9f79b655de3c96a3674258f6f96b752da0. 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/UKZGC2201527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f382cd36b3b554a7707acb377ff5154dea2678983f1cf5ba82a6165c749d28b. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/UKZGC2201528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0de0ce63cf97b1faf5a26e78bd500fc5e062286a3e8208d6ca4453798696e2b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZN882158137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927ae8a91ff2ca5d352c9701efbc033198a114aaa5d1641368aa6e4b45e95b64. 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/QZN882158142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548e325854e89594685fa3f5533bc42c6c5a6418ea312dd97a41dc2d5ea6a0f8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKZGC2305357.