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 0x03aa0c9fa8a48dde531389de7ef78dad1901b9ed46b06eddafc3188e4e968bbd. 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/82e2d4ff-dbfd-4661-b705-c1012d65773d.json and https://artists.proofprofile.net/proofs/artist/82e2d4ff-dbfd-4661-b705-c1012d65773d.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 0x9650cd8c0b9d95835cb1f762f6fbd4255ff62f3df79a4790ce1b9cfa1d14cba0. 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/QZNWV2100813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0b956682fe9d060d546d15e44c701f578fec7463e5695ee067f5b69ba252d6. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:45:43Z), 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/QZNWV2100821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a3750dd59407eba2df1ba8467417104865c07d5bb0a05be29179cf29333bf7. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNWV2100825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062688999d28ac099f94cde5e6d759a08145ee5ea9692e9cc3b014c2f1180d0c. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZFZ32264882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be382e2f9f18241667305857a86ee1d4b239a696432b88f02499a5efb5a6eb8. 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/QZDA52200213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f669893a839bbc9ee20a26760e4aa80cbf43a14191dc90df452968c5928cace. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T14:01:20Z), 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/QZDA52200217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc3a3364bda03f9c96d6a525f42393c32e5ee4d534d4830db87249cfd6e9af4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZFZ72222054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce9a09bf083434058c8080d51b154512d12ec3329e9ffb964cd30e2b070ffd2. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZFZ72222059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d1e62ea2a3e095d4d7e464231fbc197e7cee0fdad68eb2f98e2c727da8e8cf. 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/QZK6N2201369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08a555672c25784fa933f4490371ec62babf1d1d161c32f21a6ca77f9a9f8f9. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZK6N2201370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbce8a5774574acc3918f26fc776910faef1471b7a87ffdcaa09cf10b664482c. 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/QZK6N2201372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2725dfed75ecba05b3d3659c186eb2775be124d1512c1abf099398990e7422b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6N2201373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f4459e7079af82423fdcb0ad2d62dd06cfa250d2dbf24b5e24da7768d36b8a. 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/QZK6N2201374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c17554d9d6232d8fe7d048ae09deda811fc9442e5edf7c20491e3b45c77fc01. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6N2201375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312c541802b68f8cf0bd743d7cb400a7ed8607287858cb7f5d69a8c0b72243fe. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:19:46Z), 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/QZK6N2201376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac457cd6bd6ee07e2e9d3a0ae6614f5b45fe607dd9c88a9c20e0172a07a69992. 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/QZK6N2201377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdccf041caa2b4dc70f4827a2fd91218695e373a4575a2433e935cb594a4c5a2. 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/QZK6N2201378.