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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7205887295dce194bb76208f0e336ea6a1e475f7e7fe205568ae64880ce4fc5. 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/7a20ea0c-4b74-4a35-9a4e-6130e9bcf107.json and https://artists.proofprofile.net/proofs/artist/7a20ea0c-4b74-4a35-9a4e-6130e9bcf107.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96bb021eb670aa5bb8f5cce8c332b464690a2bf49232ff4c422c99fce9eec389. 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/TCABD1225178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9eef7d61bf05d974062178e81e0d88e98d7423a213b07b7e36de563a81352f. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/TCABD1225184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe59f75312067cbf49d46f352a9c5cc1dcb02d73a78ad2b0bfbd3cecfd17b9b9. 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/UK6DQ1410001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36634b9ee01fd6a47d48fc17169cca2bad93796c40ad82fcf4aad87af0e07124. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/UK6DQ1410006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e1b0aa039f7af7ae97bbff3ff42f195258a5689dd27c309f23f5dee621b151. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/UK6DQ1410010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7389e257b47196f1286aba3cf8024b70d8b599cfc19eaf1ec13f66ff1711969b. 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/UK6DQ1410011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdb195a24eb8d1ec66c333728eb19a6575db5625338e3b3c8f3469e4409c615. 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/GB6DQ1410015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44be7d450d4add5b0d75150a2c9b8e84fa1e6ce49538deacdf10c22e35f2f11a. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/UK6DQ1410002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2bf567518e32f442dcf8c9f046b2f496e9b707a0bab3e89f1b55f04f7c35e31. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/UK6DQ1410003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb50d0e37fb8a44251c3970455399aa128e0758120e70f392c90bbcdd51580f9. 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/GBMA21311731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c50bef359d10d04b6d30e1c02ea9d7c9ef042500621eeb78f5fa4c2919ed77. 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/UK6DQ1410007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96bb021eb670aa5bb8f5cce8c332b464690a2bf49232ff4c422c99fce9eec389. 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/TCABD1225178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0ee507ae5534747c0231593983d09106e18fb66c49d0780e80b62dbc670723. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/GB6DQ0214424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95619d34d1c1fee8194d8d093e64308674baf0511e1dde78a95757a95d4bb44d. 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/GB6DQ0314424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6b011be4e33ab0bc641bc40298d2c8dee626e57f98ba3d40434330d2ba8dca. 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/GB6DQ0414424.