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 0xc6a4fcca25297a3bfb38ee43355eccad3ed440255ae5e10ecd8585259395dafe. 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/11e45189-9a85-4685-b83c-00b88badb149.json and https://artists.proofprofile.net/proofs/artist/11e45189-9a85-4685-b83c-00b88badb149.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 0xb862366c71075d097b9b9a0e5c97e2268f0b66e96bb4442ccccf3c4564d2c2dd. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QM2PV1803332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836d1e4dd5792b336f78fa655d4c56c702e094efa100244ad29aa5455099d491. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZES51826260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f1b666c7d3fa8cc75a632a30d36aa9965e1d47d2d22dace94fe2e8bc4c5757. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/QZES51826263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f62cb42b359ad3ab3443404372be29dd93d9d5aae2518874da84251d73315a. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZES51826264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ae5664ff76cf8faabc38533d21c97c02b40e5542e7a2ad2566c7a221b939b9. 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/QZES51826267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b96f50d00b9eb290bff3e0d7a268038608f078c13a345ab8075b1142e3eb344. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZES51826268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebe0ece893e8298f400c7c2cdbc16e9cb146a5d0d34e6c6b87e27480839b2c2. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZES51826269.
Linia Ta De Bronz (Live at Diud, Where's My Tune?)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe91ca056dfdfa19d9b99dab7c50cb0bbafcd526403d3ae08edc1011562cd32. 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/ROROT2200300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52a0914f10d02a6475514c4c7f8ca55fcb81d47e7a102c8b9e74042f1c544e7. 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/QZTAZ2242884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15552eb321f2c938c96cfa4a2255ca83dd6597296b5f248a5e19f0b285331e32. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/ROCRP2306073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865d90cabffcbd043ba3e9e38488491b849f1355fea32faceb1ab9943051bdc5. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/ROCRP2306085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a463ffea75e3ef7ea59e213b95077f8a4c9289e3f39c324e800b7290c1a4039. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/ROCRP2306118.
Marea Parada (Live at Control Club Bucharest)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb86c5b60a1c6e1153dc9c11964423f68f19e68490b624856e7f767cbd913c34. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZTAU2529811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62844da2ec89af3d4b925cd6c11cd45a20c027b91ad9bd56059a7cb620cb6a0f. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-15T21:33:28Z), 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/QMFME2582916.