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 0x880050c61c9c4ce7dab6f2dafa53ad16102bf46a62a9a09cb2dae5cce86b113c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/48506f99-7eaf-4d32-a8b0-9ff6228d037b.json and https://artists.proofprofile.net/proofs/artist/48506f99-7eaf-4d32-a8b0-9ff6228d037b.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 0x44728417c7f27466e32937779e5b882be88bcad0ce2ed53fe06bb90bae52aa3f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZS672148293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c77e69c1ee376bd486b91a712f0f0ac9235bd3ba328351a62cc469aecc62ab. 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/QZS632155993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55acbf7fb26a1e112733b7525ea39fbfaeec318295d1f2f8772ee603bfac6f05. 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/QZMHN2200845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5a8b27500df8e8d11cd65c1d3b55180cb6df53d84f263ecefafef94226ea0b. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZTB42238412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37bd97022e5a98f990ca171432468747a834cac55cc3b8980c214bba9192e89. 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/QZTB42238423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4248263ada91f128d7ace7f0f1a07fbc867ec5be27004a5e0e0f2f46066e65b. Chain 2 (Bitcoin): anchored in block 958677 (2026-07-19T05:47:23Z), 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/QZES92354850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228032be99f57d6e74d80f7ec069f1318a688b24a97312f319787c316d16e82a. 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/QZMER2322865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86dc4f9be22f68139ebe737853289c2665e6b519b0a9894acb785b47b9213e9b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZMER2322867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb19b59df96e0cc10babeb8300aa80040918b217002bd386a8eb3728fb661526. 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/QZMER2319220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3709d6d02ea7514b3e159c112c69dd92f6879a6e45d838c20b1cd251b4ecf3db. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZNWZ2369077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a6cd2b087c19ee82fd60a5ca8121cdaf2767ecef0f3b793a6d924e58a045e1. 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/QZPLS2320358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27184e16b525332b9c5509da0fed6929421ce24dae15a2384746824a4a28058. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZZ7S2466275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48d06b407904f7a8c0c20255ae14adc283a20818efbd42445474f54e57316f8. 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/QZZ7S2466276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f8f16577889310c33490ddbdaa50f19c8c99efea5cd4501b01efa7c224bdd1. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZZ7S2466278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09584c71754496f35c569bec81b74bfb5130c9eb7d97fcd0c082b12b59232dc. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZZ7S2466280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d99330289461d70e940167cc12482de0002e52d062a51ae5a19b7bf4a8eca85. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ7S2466281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1764100f57841e132a97b7fd367124a30e4a3a974b0d058400161624837e3da. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZZ7S2466282.