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 0x025f99e506de8eb70c5ee06743af7163e33affd661c5eacd7f19f9a615a0da0d. 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/1bf1e16e-a693-42f2-a3ed-638125dcae1d.json and https://artists.proofprofile.net/proofs/artist/1bf1e16e-a693-42f2-a3ed-638125dcae1d.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 0x5c094e0279115d3a1661c2175dc9a8d8be2d095825d7cafa5f9b7f4be7351764. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:30:54Z), 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/DEP961200056.
Charles Webster / Paskal & Urban Absolutes Remixes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24821bd35af40c09ab5235522bf65707cf27c9f7a8048a92fe9dd5d3b25b7255. 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/DEPX51500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45c3db8f1bc80c11be66905e5fdd576276067220397746138b34887b3b82ec3. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DEPX52000032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede0845022bf0b5d21150244fa2ed914b1c0ef19c79dbcf002c5b96819b7d81a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEPX51220006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c5d112473d45449b212c5e7484fed5defdf74edc7c5582c691862c9873926b. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QMDA62400833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27300077eddbdab606ecd602650447c96dfa34887578857514cc7ae8b9d441c. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QMDA62400834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96465db7c0a8454d5508ec5b46b072b2673169784d433b66ebe3b9e43217f62a. 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/QMDA62400837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a83c03452ed79cc4ba08828e0ec7ef2bfa925674e362dd6dab4c9d6c89498b8. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:43:58Z), 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/QMDA72597336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c409eef48efd63d75244698ea4498ae7d20c83115ba25fdeca3e216f5e10a7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEA891700359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725ee3c12ba0d681898bda2c1cadea1392fc3f04bc3c4a6e5cb822dadfa3d321. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEA891700358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db7c700f20eecac1256de912cd7d3e9d855f472290dc2bbf605c8d9966097b8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEA891700360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd426be90e96a08413fef023a469e8c39cdaa53f4a33c8d166ef1a03bf6523ceb. 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/DEA891700364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0515f9211e459ec3591efbfa1435b5c5c1adbbc6b9d7ff66507b6c9502fbb0e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEA891700355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a301e0d4067f2d28a7c6276e50a2a77bcd17092863040291ca8f290c3991d0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEA891700357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e56be34ee4520c7bdbbeb3dc8c6627d7ad4ddf9ab804ece80e6b3b0ebe6dd3. 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/DEA891700362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f5d4b7e08a5e0d762f688838556f582d90218db7b8eca12868c23ea4b6b734. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEA891700356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2da3aeba56a943a169a467189a2f347e15753cf02ee3eb4d25ba9e2f3fb0df5. 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/DEA891700366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5c2e6239184c6e70deae94fa754c387b3873c7edb01bfbb91d11a7599a8b1c. 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/DEA891700367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b9148d5d7deafd51a2f7e7d57670912e27468c7b9581301c520c59aeb1e069. 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/DEA891700361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9c97f39a68964f4f5f9ffbde93bab2191f022a0ef0657724f2e034c73646ae. 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/DEA892000055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e73b2f1aa4ce954d7073adb76d1ede4fa09cb5756e13c0793afe8990972ea5. 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/DEA892000059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0472d32633ba040ac91bfe33cc53ecf355e061f79581adff74ffcc41d51b066a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEA892000060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b9791c18890453d2b14c1bb41e7172464de0c38aeb2b685a9f14b75f75cb11. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEA892000062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa8142417b02aaba30f0916a73933fbccee48d4348f2d39f6e1c008a08d3a3d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEA891700363.
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 0xc07decc8afd6a24f95a8a47789dea438927abd3693382c5a21a92c1da40acac7. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEA891700365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e6ce3ca995a1547dcf6159cb2aff3244fe4a0ef4057a11e41c12fa3264c4e7. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEA891300373.