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 0x7719db8b262a42261d52cfa1b65293b7b950d6e4614b233617998b79523a6766. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/59e45126-a7ab-4a37-beb9-f0ddf936aa97.json and https://artists.proofprofile.net/proofs/artist/59e45126-a7ab-4a37-beb9-f0ddf936aa97.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 0x6eeed1a831fe5ea91ca70d8fb3641dbf08553725bc8a046a55d9cbbbb936b898. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:49:30Z), 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/QM4TW1857226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120890e820fc4a5e28801bc8fe62808fc115fdf96448049d206ef6044da0417d. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QM4TW1857228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7831f3c89b70c1ccde2169729f44c89bac8ae9a4601cd61f0cb666a5ae03c75b. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/QM4TW1857235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc0ab20d333d5eff56012233b296891d584eb3254bd932711c9346e633e7f20. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QM4TW1824457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1e32402ce511c033a3c0f7d513e9e000427fe11a71f32b763528781fd54238. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QM4TW1824460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a269d8c13f8421f51329c7bc9465a39d0b1d7ec7467355007495deefb87fdab. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QM4TW1857248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f3229bcc79cc915251a3174489fd52a511bde7c49effebb8583b401a4a67fb. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QM4TW1857249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f38c849ca60bd754c6f92fc1fd05d5e1cc65eaad252be0f8f12ae1c38799a2d. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QM4TW1857287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc974627d1514034ba4eb42f855e1fe3d20c1e4dc08a58571678265a67f9d7c53. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/QM4TW1857289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa642fbe44fa05e9415625b2c5c101791b327045034eb8009f31d97fd7d811fae. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QM4TW1857162.