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 0x059d33f9360945193d6b189409d3afc8ffe9433c78080e285668cf21fd2ada02. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/92bbd156-07a9-4f96-bc10-a023b51e0598.json and https://artists.proofprofile.net/proofs/artist/92bbd156-07a9-4f96-bc10-a023b51e0598.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 0x3ed557ff2090d6fcd0e4fa40004f1893f94a924cd6564249cad45c0f9ab518bc. 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/QZTAS2397506.
The Collective Deja Vu of Being Cynical - Ippotsk Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c7e56f086f17ed8d8ad4e7cf718596e49547aa7ded6ebd51630a95e4916f52. 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/QZFZ22456426.
The Collective Deja Vu of Being Cynical - bad narrator Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4cd69bf9f1517dd810b50e389f1b68b81a15be697ba82b8ec2611c54e038f3. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZFZ22456427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f0e885d75ed1569e3e1a2af44af3ef34bd45f9a9c30e1fe61d58f80d1ffab2. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZFZ22456428.
The Collective Deja Vu of Being Cynical - Vedra Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d49907aaeff0e82d8fa142b0e40a8f60b048d14981ece7c9a4daf8faab9114f. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZFZ22456429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00699649d12bdb92c40e3eefc6a199591dfdfd0f866d42b0e446b652f04afd0c. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZFZ22456430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d749dda259c0cfe4ac37e8470e72efd4506bbeda5ff078d64853c426ae285b6. 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/QZFZ22456431.
The Collective Deja Vu of Being Cynical - XxCHALKEYFANCLUBxX Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a2c77befe0348a05481784602b1dfa15c39c2b1ebe8ec86580368665d124a8. 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/QZFZ22456432.
purple sunset - Midnight City Music Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e684eb26ab871a3a2a3b1f064ce893741cdaac771566b92d4ab8db1efe81c2. 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/QZFZ22456433.
A World in Stop Motion - Aquoferne & Viznode Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d9f73d39a7b3f553af69bd07a5e7b79726d4951ba030aea2a98ce3cadc9ff1. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZFZ22456434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d7de2157d5e5fc3452dacdf0bc94dbf5c303ec578796cd9a56b3f781edcfb5. 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/QZWFE2462196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1814ca427b67cbc2103fa59fd510ac7e196eec4b08cf9d9173068a5b2c18bf. 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/QZWFU2448829.