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 0x7332949830ddf83b3b1407b2f7a9c5883ea3a174c673695007625124ed3cd7af. 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/47085d72-d594-444e-a16b-84b896561fa3.json and https://artists.proofprofile.net/proofs/artist/47085d72-d594-444e-a16b-84b896561fa3.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 0x59fad1be03587c1467526df832fc30fab3f5cf2b4d46c6d383f58ea2a7fcd41f. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZHN32095738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ddc484d77263d1b98f260c92fdc50805beb5fc787cbcf011e2bdad774e8507d. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZHN52058495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36d98b6de55bcdcbee5ce8167823b8d529b87b3f53cba8fe1ad7c8c01156422. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZHN72006525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78547c274560a73b1505d0fef0352b4fc68c34c7664bd619d1e4a528c25de1f5. 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/QZHN72055539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef79d9abd94dd34245d2041150f6306eb2fb351d2d594ccaf8659b1f61d3a8cc. 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/QZHN82076806.
Children of the Night (Violent Cases 19)
Deep Inside You Know (Cult Collective 28)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5d31360bfef6ddb400094e76194c7f332080c884f3dbdede53eb432cfd6c74. 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/QZK6M2011277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde74d589af9b8460ae0212ccfd1e78525036507e4181eb210ac909904e8a913f. 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/QZMEN2097585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc115659a3be54e9eca466ff9eda8044c924e0ce33bc8fdfe1f67929499cfd4. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZNWX2004748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbabc6786d0bb957968aeafa45b5ea9bda51132b700921803a601de8e7b27355. 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/QZNWY2064116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3329f5887c43d8c5025c87b574f48f31b3d6f715054fccf345c58b5ea309490. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZK6L2149874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe447e665c0ccb53a1d9fd8e160484365b655fc0580d4f1c629f970b80273d2ec. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZNWY2140888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022d9f711393cfca316a23249b67d98c1df46bf02e28f39d15978acef5d84af5. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZPLR2206120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bead8023a2966360c5c36adf5076105e51d167469a1e53aeed7cffb59fcadd. 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/QZK6J2300860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef89a107b8571d1731c6b6fa8ac0c5942d051f8ac1ae6e8d99422d73d398d3c9. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QZFZ72560192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0dda228748fc1f7aed211613eb10dfa6e19f89b4e9249d9b395d252ffc52a47. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZHN82584298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870a61e8b24f0185a18bf68ad5a83ed2b1e633209214869016e1eb98ac355ce9. 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/QZZ792546373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea7e52c93551160082dbde69f8b85ff71acac8166fa376f1104f66f6476a91f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT3F62509506.