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 0xa17c6fbe67001102b223e1d339ca8ad838fae4cb827ccfa1bf9a894de59a1e89. 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/936b8664-2d31-447e-b5d0-a5bda23a672b.json and https://artists.proofprofile.net/proofs/artist/936b8664-2d31-447e-b5d0-a5bda23a672b.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 0x19cdbc31a57d777309f8ea84c1c97a62cdff664afd88e178f0d79d1304447e9a. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZES62078111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208af5451ad9cfaf86270581211b9edb54c96fdd38b2f72b167a1f3660c5fb33. 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/QZHN32383710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722a0c65957ef2e968b23ff5455bc85096902bb2cd24dc1991011b294c6c0614. 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/QZK6P2326544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123cb93f75fc364ed666df24b39010cd6f9494d46c5c7805f73b7a0e976cf1c8. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/GB2LD2320151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d408d10cb389b046d4bda3c2506cb26ac19d9407ca526f9e8782c8831f32199. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:09:26Z), 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/ZAC012301020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b15ec0d628b5ddcd3eddb87786c9f4000ed469a8019b83c5000a82c84f175a0. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZK6J2484292.
Without You (Precision Productions & Samman Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921e0ed59defc0414b40990e35281cd73b3fe8f7b783111df9b4dbc667477cfb. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T15:56:42Z), 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/QZTB32464526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618f040a42f836cf25f8f61ba0951f822ef7002a5017b866be3dbf274ea771ed. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZZ7N2438402.
Drill Ne Ngoma, Vol. 2 (Freedom Fighters)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b613c13362a4c03fec5f006470d3f9206f2701f1a507479368c94931b7ceff. 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/QZZ7U2428925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd50e3546db20d5a34cd009191f6277b3db2e2923e1c69ecc6278ed2cbec2828. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T19:56:11Z), 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/QZZ7U2428929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0119b73aac5912d5324b2f8bf6b44c1c72b0f3a1913def07a7ec5e20d9500f8. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZZ7U2428930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d59df0908653abe05fccaf2b840ba56ab2774c16ce9b8cccd77f66f5e26f6c. 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/QZES62539420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1109f74ea7393107cd1e98f6bbe32c6039fbce298b960d489ab3c0f26c7963dd. 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/QZES72592897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1190a9faf04ded08c4d2857138ed297b562e44b760e7c1bfd1196a2a7be68dce. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:27:39Z), 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/QZTAU2511854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b384bb21d390ceb06663339299c9ed641b3fe45947ac3549b63d10b1bc21a32. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:25:34Z), 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/QZWFX2562707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a62d177edf06152689d49fadecba58f28e1d693923955c8fb73b4eb1fc5d0b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6H2485335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399c4754dcfae06f6240e58f8a29aa05d9ed0679f52d77a334cb49acf9b0a593. 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/QZTB92368275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58956230460089429853beb516d8736a271b12f2a576e39d22e70dad15b7d734. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US38Y2426729.