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 0xf577f888192e12a4f926c7c9ec4843e503037a719705e8504b514283e1770867. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/33cc82d3-bce0-44a1-a62e-bbe540b93e1c.json and https://artists.proofprofile.net/proofs/artist/33cc82d3-bce0-44a1-a62e-bbe540b93e1c.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 0x2444550dd8d8de0ca91f2aa7eb410f6ab9dff500d5dcd8e37b4d99c766c52972. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/KRMIM1921840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379104864b6188f7c46c2a210ed3959910eeadd5d246118c7676de817a3d7cbc. 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/KRMIM1921843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c8d8185c76c03e310c47a4bf1abd83e75589d006a96c16f834110a45c89a5c. 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/KRMIM1921847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94d073c5a61cd42d8f3bfd9717915a91aa83e93a5516576b12f3d699b23d902. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/KRMIM2017390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb744ad866077f424712a1241d5889c0151d52e8d02a57df1bb6de132d189ca57. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/KRNAR2204349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31d16cf2e271954e3259b4138349ccf2c9fdfd400bdf768b6dd8d5126825400. 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/QMFME2332306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f96d6d4383e37d020cf7ff65fd97c165b32fe92f512f65d5339b51acf163b3. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QMFME2361229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2b8b8091ae5c6a04422d011ae28210b49a337620775415284e876792d8b296. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QMFME2361231.
Dingo X Dejavu Group 'Wrote This Tomorrow'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31759e9fbc54e6ceb19a08e1e5a4c0159b25fd2d59a1572034b70fe2bbb78341. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/KSA012120791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa177f10fc0950c60f1190383e3191b9e2d970b2c0ed162a7fab24038acf71582. 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/KSA012120786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fdf10c048291851f8daf2635d73951db0e11d650ff74c512cb72add70ee2b3c. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/KSA012120783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3069dd4263094611645bde3d41bb48195097bb81ac4f4a1aeef9d4453c527f71. 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/KSA012120784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0eef6e1f7a7374b3b29b23172d84ff4317c9360de839492798e4d158348e4a. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/KSA012120789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058bbade6d67e48ba79ec1b33b5b30df56d6fff5f0d38424fe68777ece1ce2d5. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/KSA012120787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c684e5499fe83150a34ec94abccc273cfdd039ec823bc3dc8dceec1e704a3a5. 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/KSA012120788.