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 0xde3f1f3d0ec139a6fae8b522cbe42a2ae9038244d1d836a11b1def1fb17dfc6c. 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/24e07ff1-de2a-45b5-be73-52923e75f5ed.json and https://artists.proofprofile.net/proofs/artist/24e07ff1-de2a-45b5-be73-52923e75f5ed.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 0xb1ca83f7ed698231ae71db9a8af68fd09d73509213beabdeb049592ab9d60a3c. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCAGA2254013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46a7abb7b96c30db454165bca3b66a4782151561d7d9ae6fe015c9915bf1dbc. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAGA2254017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090a172e52215b7e5aba0884658d4cd14febc161ad0363029e9ff2ee63cfa266. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:53:45Z), 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/TCAGA2254029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d976e119548f8a7aa1c64e8081900b03b86fd03408108301fb83f26882aa3f3. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FRX762245684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0322a1c2194b1a2021913dafe6cd3b16680d0dda2bee912af1f7b8f0695c21af. 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/FRX762245685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b4aacee5e856788a80b3fc64665fb78de76ecc6eda4ec776e52fcab4a6676d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FRX762245686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc19e2279cdedd209435ba149d94b816a4d8cc5db770151241dffa56620bc2b2. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/FRX762245687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015d178afda2cd037a9f8b645bf27fa17895377b46956352e7d3d8a5052afdd7. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:31:46Z), 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/FRX762245690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210f593c94322ace456b67190f95ed1f911bb04f09fc45ef3ea7d5c58c1fe5f2. 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/FRX762245691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e07e6f5853655f5ad2fc4be92815ae06826b743375695cb5f1231403b6ff242. 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/FRX762245692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443cb83923de64a9615cdf6d54f9416cd81205dc9ad23f0c1634bb11ad54b0d2. 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/FRX762386118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41174eba594b39f49d00350351cf5b3803576a39020e49940cc53ed5b459798. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FRX762386120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b37ed4bb52f100b9db896263ae37337c9c18052ecf7a8605688e533faadc29. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/FRX762386122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21542e6dc4a8b149f2b7cee6048454145c4978b24ca4413eff1c91f2d7f950b0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FRX762386124.