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 0x67ef4161cbb3bbab0a7fc25d4a6901f94311f30ee5162f86f7c88c76f9282cc6. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b9543dce-2bfa-4dfc-9da8-14ca91ede107.json and https://artists.proofprofile.net/proofs/artist/b9543dce-2bfa-4dfc-9da8-14ca91ede107.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 0xfca58ded88652913f29abe2cacf873c5462342984fc012b9d197067d597bc9fb. 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/QZMHL2099827.
Darling, It Wouldn't Be a Party Without You...
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103728a375ea30886872340cf2d6649527ef70f5d90498709ea87f59077589eb. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:29:16Z), 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/QZS632308027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d17538ebf73e69fe85f92abd03c51513ff9ef6825a849a48d60d72781e70b9c. 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/QZMHM2470238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0c53bd7c0a76449e9eb26c0cbf5532d776bb0d695ecdf769e52dbf40760566. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZH5E2434618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f8b966d4fe85e10430e9af50ec3e243791bd2b86204939f2bd4e52a5bb4b45. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QM42K2598159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809cd71ebdf968d0796f4a7f7e79e9ff496755013768e3a4ecc8622f2653ca02. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:36:44Z), 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/QZMEQ2519134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fefa050a451f61fb3cbc11db302eac37eeffa9fdc7a5ff5961719c6f68441f. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:54:20Z), 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/QZMEQ2519135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed39ffde82711c4ad0b77ec4e6bdeb72da86c56d5c2e9b6e5d1570d13c4612db. 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/QZMEQ2519136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d4c0cf0e99e7d572e3744d8e6ace26cff106026ac8dee5451448a5588754fe. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:48:53Z), 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/QZMEQ2519137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e9ab2f1c16991099ae7139cb604c6ec41632b54648fe4189a53b2cba688d9d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZMEQ2519138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e435543f71a90447cd946dfd57a98a5627aa3c3abf3be78b8b2850e2fce070. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZMEQ2519139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2d3087fd90aba6b2ac582b5a7eab4ec26fd34f62fabf37812e5f1be366dcb7. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QMDA62593222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd57fc5a8a19a142aeaf0b47d81408bec0bc3e541102c06cf4f5d7938eb81f8d. 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/QMDA62593223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808963c25eea91ffc4730d7b140d42dae3235319174405d64e1b4f25ad0447ec. 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/QMDA62593224.