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 0xc56ab7f57623dd786086276cc0263cd69ee2b705b532ec019c714e8b5c17e34d. 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/f0ff00e4-2153-4839-963d-c5bfedb6568c.json and https://artists.proofprofile.net/proofs/artist/f0ff00e4-2153-4839-963d-c5bfedb6568c.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 0x12eb90b9d8f3bc45a43c782323b3794c5a82d34b90183593f19b51ba718c6bdc. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/ES71G1725533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0beeb3b643cf5196110431590161f7092e12f5e50533530e4d600eb5f0574958. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ES71G1757553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261551d973caca90dbca7da8ebcf3e57ec47379dbceffcabe8c75c272c267adb. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZGLS1968962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbe6c6f04846dcf31b660bb066b13745f6af4b9968e5795c6e5a0f2c380bbf0. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:35:25Z), 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/QZGLS2096972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd6167f7d6835109126f4f55781a70a12909cc200cd0454bfb72e082170fd11. 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/QZ7362300155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a1913bc070fa05e070b10d3c6078af292454391765941ea3a03c271d02ac68. 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/ES71G2416010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30318a22ffbd82050e86ad0ccd50578a22ed472ca11ccaa3bb0facd7bec2f3f9. 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/ES71G2329991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a1913bc070fa05e070b10d3c6078af292454391765941ea3a03c271d02ac68. 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/ES71G2416010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3d3b29e554305899afa95c20047c867f1d9be4ab678e75e3efb6656fe16cc4. 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/QZWDW2343795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e07cfb3a4d3a70ff7c8a0425f072aa5be595959df506537b764b6c65f4f1aa. 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/QZN882347664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd6167f7d6835109126f4f55781a70a12909cc200cd0454bfb72e082170fd11. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZ7362300155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4574ce7777bfc3cd9447ada6ef64c96655ba0b0b97281829fe363e198d869a0. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/ES71G2424618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d0bef04b693520eb66e02b6df12efdc9e61ba6a49cf34b3f7996b8c4af45f4. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/ES71G2424581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb52b4d5911008614375277f4d3e20f41bdce00db79d1310e58a4bbf5c08da9b. 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/QMBZ92595746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fcf6e21fca2c4a75edd5a4ac89ed1a35bb86412ff805fb7b22e477a72d38857. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:04:35Z), 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/QMFME2517527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe388f720ea2dddec4b9ae253c2411c66231395c63525fc8cc739c1d3c51e7eac. 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/ES71G2215215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7711f62cded1e5496ab971f69341c7879a08a2cc61667605b19658aaf9fda6. 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/USANG2019952.