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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a518c675756007b03f29b3968cbc7a0f3a85b114713ca766fc2d2e3bda61785. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/04489c9a-1a65-45f8-9976-4294dae6c32e.json and https://artists.proofprofile.net/proofs/artist/04489c9a-1a65-45f8-9976-4294dae6c32e.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5304543f9e5d1bab3558b4c03d8be34d0d3f8b056a0e658993760db35fc5ce47. 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/TCAAT1021135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4110c18ba20358dbe29cb26412627b743ee0682032b83f8dca1af5b633ab28d. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/TCAAT1021826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b4694f48da2d393dba294613403df3a2ea52b2655f0843dce08d4867a2d031. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/TCAAT1021829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f34c3de0f8e53fde15d662a11bcbc11d2eadeb7cca952eceed69ba9830cba59. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TCAAT1021836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e97811467bfd3522c3594a3caf878ed8b1ec7dcee18ee8221697a2fe162216d. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:36:45Z), 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/TCAAT1021837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8724d59b8b1967098416278dc9407e861ba26e70b0bf249178bf36c006ad7854. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/TCAAT1021846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584abe44379e4a148ab4fdf45ff4ca28b9efbfd2851433c1c6cf41c056145487. 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/TCAAT1021850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b003a78ddb3568bb86e166419e013e5833ce696b7333b368ad46e3a44f9f466. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAAT1021873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4d262842104e06e56a1f9b005beee9a50dec718bec534eb1f863e2721adc37. 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/USUR41736701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb713917499d53820b9a16a2e5da0844a2774fe91d491a276e551d0c50e3ea1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USUR41938617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9ef22b6198023e2dd76d4f71c63d99a55a1bfc7859bb57b478379d233536c9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB8KE1952012.
DJ Hybrid presents Welcome To The Jungle (DJ MIX)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48f1b7a66575c6d04758fa40cb874b80fbdf7f220dbfaea9bc1e49a11a727a8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBFG92200235.