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 0xbadbcff4f85a054168db2f1a6922c01ad48a7d3f840273412ebb2285d4f687a2. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/efa932a7-ece9-4dfc-a831-f84f8a64ece8.json and https://artists.proofprofile.net/proofs/artist/efa932a7-ece9-4dfc-a831-f84f8a64ece8.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 0xec2775807df9559f8ef4eafd5b77242f108f0e380dddf5af617481c35ea9532c. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:06:08Z), 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/QZS662412298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d9017a9cb417565da9760184955f70f9a0c72119437ea344e3fc01cd641b7e. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZMHL2430264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593fd8768ad2d2bd42cd42dc859f8d70966936307471235af221daf45f26efb3. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:51:35Z), 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/QZMHM2411411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85445c34719acfde5fc3e90538d0eccefcc4b863590060d5b159543dd30c95eb. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QM42K2418638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d1548660914a1951168ab7394ec748e2a42140b83ec308aa3091c3ff6ef116. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZS652412924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af3382cad7c1bb1d024b611cb48f575509722633f3865e66acab218efc46d26. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZMHM2488306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3792e9db89cb571f8d0d27a45d8640653af33160ecadbbe7277712bdf5f54ae. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZS662487178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd1658386187ef242ca80ea6b3513445d5f99ece0e7df1af005522434b53d6e. 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/QZMHP2444375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a29c80567cec9535e2bdc11e6f03a77e4bf783edbd7b40384dfb6198b83aede. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZMHM2478646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4b19e1f02e4742a2c97e8b8b0ff096f736c915a199a408fc420c95ea9ac112. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZS642402322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05571500faf8169c6c5ad8bce4a6090aa6094c3221c3ae86a140febbb97d97b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMHL2455175.