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 0xd1db405ff452866e7828ab619daf4b6b439a3ac80adb91aa2276f97caa2e9987. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2b4c44dd-18d7-4c29-a525-3b33296314dc.json and https://artists.proofprofile.net/proofs/artist/2b4c44dd-18d7-4c29-a525-3b33296314dc.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 0x1ad8476059f733f2e2281205915f71b6ed9e6fc1062cf473d256ffa61c7c824d. 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/QZHN82530956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ecc51aa669263da4bbec8a1f82502e38fd8e6d290124281d85556a17ef15767. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZHN82529208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253d4db820218cc7e98a72409148c9f52fdff10c153fc1fd92b516e9b48c0fc1. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:01:02Z), 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/QZNWZ2501130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3faf2904fcb10468ae9f729dd623e841dc5ae915d7d029d00c29a5382da4675e. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZNWZ2501132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe287f40b9451d56ea6bb101bc1ec4bf8f2b914369a98db7e03551e45bb7b0598. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZTB32521766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b96b054ab0521df590c09683eeb7d7d49b9db1b82810df11e1ce9088c21cbe. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZTB22579418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94d1f6fd34359b32d64b6a03ddf6ae1137c1b33a52d62f23f9ee74e8b3292db. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:07:11Z), 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/QZTB82549641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96bc0d6deff76554c6ac866cd242e7b71221b9581e618efaef9aefd436c4156. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ7T2579863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead6acc9d8209e2716c339a6e829ae2ead412b8a8958998a4fcfdc0a5f34e52b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZZ7T2579864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4f2d34ff5feb2bbeac733b4fbfe1f84f7052df98c39aeb02d3c849916bc9bb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZ7T2579865.