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 0xd406624abc85677bd38ea1e39af3eedaa0fa715cbc7fdb0abe61cbdc97ab4830. 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/5d2c43e7-4fa3-49e4-ae63-67e89dc93655.json and https://artists.proofprofile.net/proofs/artist/5d2c43e7-4fa3-49e4-ae63-67e89dc93655.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 0xbad16ff28eb5b7b33780016a4b3780a52ac5dc48d76aeab27643ce9e47af738b. 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/UST8K1810835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad1bee5d7f872f5cdce4298f948a71b75b5da9ca5a6618f493c9d3317bbdb07. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:20:30Z), 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/UST8K1810837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15fca0cb36eb94fe42534552e6f6c75343ac23a67cdba782961b8ce1718e543e. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZHNA1929784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1420e8c2cf986e7bb9bbe6ac31cf4d17037b8dac7b320998f6c18e60d500fb. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/QZ4JJ1956669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc6710d2a8b5ca7015af49ab80635575b84879385796e88474e78019260196f. 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/QZ4JJ1977899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf477f67f95324efe8183858c45440679766d936beebef3556c73126154ff6900. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZ4JJ1977904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23e4f1aab6ee65154e78da9ae5d1d3aa39646c130512e2700d3de9379878415. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHN61943629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83484b152e4f237782f7f0d125deb11a4c01b58d2836834f874157200a7b2c42. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6M2002610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3811b91395834f3a21fd54ac56c2521a9aa8919a88c6333aaa31d94477119c. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZFZ32109536.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a21c4679c6a58fd5aec8c9af3622430b684c83734e62a1cacd064268752438. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWV2183047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47596a2013c90ada41a0365362da69c12f7a577ef7e21a08f0af24ab4579ba4. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZHN72228507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c27744fd9562fe93d4cdb80e700f4e6e7486e204c61da0f94c4a07f560374c6. 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/QZWFR2323115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdc9b7fbf6c4fc8a03bf9c6820cf13f9fa324d133a229762aa673851a871dd8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFZ72583268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49457b88eaeb10f27b75cfb786bcf41fd7879cc22e336f2d620a6766cbba371. 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/QM8DG1600531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158feba2d60626c3f430a69e5ed50f91414062cd8b1ea0c04dce11c5fbc2edf2. 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/QM8DG1600597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c9fc7b917e9db3624ed53b424419dfed7b2e5b22c84a7d85474b82962db377. 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/TCACI1557763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9651fd00306250f2e53858444dfbc763cb2e0da2315fdf2e524352ac38e253a. 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/TCACL1684193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c47735056719a4c6972d943fcfd697c0d6f0a8f7b7b881b48d7c45b06c05e7a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TCAJP2519928.