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 0x4a989fa881b73c62591272cdcb69f96597230da253cf57826fb677a8295e2c15. 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/8b1947a0-5a65-4b62-a7f2-c2c774f6256c.json and https://artists.proofprofile.net/proofs/artist/8b1947a0-5a65-4b62-a7f2-c2c774f6256c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cadillac / No Response / Farmer John / Bald Headed Woman
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 0xa94ad490a4b16cc309afc474207b081958951ac943bd369eab80272225f7dd02. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USJ3V1262022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46cf01dd5b0d4cd3659c081a2a43ef8e6f3826093c18b8e994f49083511f269. 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/SEXCH1500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc055bc510aea5613d76a62543e0ed26072ac2aac235a7edba32c209901dcbcab. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/SEXCH1500202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f45da78dcd5fd22209a044b76b18f9fded625d1b1bf40874bdc9a2453a0afaa. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SEXCH1500204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370175136510c985224ac113fb9e64c9d6dff5619d22a2c0e5e677b72ca14ffb. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/SEXCH1500205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb940ca476d3a4be8af32b829f3800e6fec2362453748aaa3500db9d45ef973cc. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SEXCH1500212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64672979155adfc6cd0364560749613e66ccaae055a85ad8ada47d54e1d5f357. 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/SEXCH1700409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64672979155adfc6cd0364560749613e66ccaae055a85ad8ada47d54e1d5f357. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SEXCH1700409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0deb3b735524903888be09094b117b44dfb0d8f99587fced2faec5dcd1bf3121. 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/QM4TW2165140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57409feb3eb5f1c2f83a4e3e9f84a8efaf0a459e4add322c8608725b9a36a01. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/SEWFK2101001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41039584ac59bc734a0e6f6c53305098be523c6630d2d2a4cfdebdfb81b7163. 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/SEWFK2101002.