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 0x6f2130a11edbd80fb9c823a8c01803ef92ef25eed9533357104da0fb7f613343. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/df5086f7-b09b-48fe-b708-6308a12ad377.json and https://artists.proofprofile.net/proofs/artist/df5086f7-b09b-48fe-b708-6308a12ad377.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 0x7b5110ea3a76270164408f1532ae815d13b01e6957483c094a8409e9e2ec91a0. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZMEM2505909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2185b78fd95b75a92f5edaea2521fccaf4ecf812ec352f341bbb60498a57ab72. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZMEM2507977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6732b71f511ada529936202fdfd87f7e20ea08f7b413c1e5a070acce50b81f. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:37:01Z), 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/QZMEM2507992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f7cc860268c7431e521243d56689a18fecd46cfd9ab119e607ecf0fd081bb5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZMEM2507983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d7ed7556737af84d2a1efaebb9535b7899a30f491313eb1a8005fe58fe53c6. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZMEM2507980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6e269f6402c51fdec58edc277307e5f3b908abcd96b76e1fe69136db8d0402. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZMEM2507993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad8da9a0255582f415c1e2d814e68f898691331617db374a8654721c23cbeb5. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZMEM2508001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9113087bee62d2f9d74433ce8a8b9582c517436ce90adb0790b17ac8bc2da6d1. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZMEM2507999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebef72ca51f8e7da3228a1bd7a45600ec85b3d755be22c0511e24aa08b78af90. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:10:13Z), 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/QZMEM2508011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4a6f8d2d3287e39e8d2a1a51842d633918a78e802296258ee87b807def777c. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZMEM2507968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a000ccdb0c20f5c35c87d7c74de3810e3d688fb6d0868e6471f36a8b36ca2f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:50:24Z), 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/QZMEM2507952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28563c9311d0bd276fa224cd1e3929d79026c023d9a120b9816267132685435. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZMEM2507967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658f5cc6c07ed7bea39c9d82a26807f2c307a4fe75c611ff9576a4fa5a76db0c. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7S2528507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d65ee2045cebbe1fe6917546995d67f56a1bffe27b38939b84d163d2fe1196b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZZ7S2528476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ce6640f4f092534a57bac7e8bf283a63e48f1ecd360bc9da98fc44c588299e. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7S2528545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfffccfc79c9ee11036f653eb3653083ef7d36c69f5c0b0a034d0521bac4801c5. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZZ7S2528485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983cedc1a36814169fd6f58c59705b5713ae4e4b0656f19acbe4a6709476709c. 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/QZZ7S2525654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52554ca192a2a4ce21191d985afd13b6e44c08873fbb871e799069ab3b88eae. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZZ7T2503119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b2f578285e7c7fce636f933d43aba51d665b3d45277a0fb91256b44577e543. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7T2503109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b8b3354f996bcbd8c071b4a280566a377ab10312eadf832a74519f48832ab5. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZZ7T2519245.