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 0x24e84086cf9fa56645f2ce99a1d4098a1112456e4b1b59c1cf027a87b53c4849. 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/6d7e1f51-143c-4e59-8bb0-ef50b0c1a297.json and https://artists.proofprofile.net/proofs/artist/6d7e1f51-143c-4e59-8bb0-ef50b0c1a297.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ethereal (Incl. David Broaders, Referna Remixes)
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 0xceec443d45ee8cf91333ad76c8c94784fe714451cfede9663f98179d21d3f03d. 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/GBKQU2054145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec4a9f7001daad1da201a6569e9f22913cee1318ed6e226acb90473ea6188e6. 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/GBKQU2054153.
Ethereal (ASOT 904) - David Broaders Remix
ASOT 904 - A State Of Trance Episode 904
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110c084bf964310ea881b06f160f4561e3758430d90985071fb02df923abb650. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NLF711902505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4e5e99e8c84b02d4d2bbe1fc1d2bf620b62c58fe5242384d2b45faf79677ca. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBLV62033301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeed977948ebe7a9276a47673715d66c4a094b921c949967e806bb5ba8eb4aba. 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/CA6D22200528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ee52b885cf1227df3c2cc33fc6a0887efa5cef8228279bf0254032ea2eae2f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CA6D22100630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8c7bd96c6f6e530e48e5e74f6c2b2c13d1770d8d1721e66b3cfc4c55a87221. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA6D22100633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7515fa8a06c6e9be8f514e006df8c4f38fce2b1c5a36aa7f12201cd5d01653. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBLV62121906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a70023bc7308e9b908efde863528f7b4824de073ccabe413ecd48c5f57a074b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/US83Z1908543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7beff10f586a426f81f74bdc6eb9140207a9d088236442e094d692628774437f. 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/US83Z1908528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a41446edb9af2e73adc6a628ba30db5e126d4c13b87e541fabab54e9b8131f. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/US83Z1908534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a7370ea79cc0feb6ba2f5ca5f2341d41b85d5fcd86914eab645450b05bc2a7. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/US83Z1908537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec93af3f47f96d0ba530c4aafb8600a54e1513e5b1f7ba5b4f5cc8b56f857896. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBKQU2189305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8a296ccc61004dcd70e004d735b554c0757c156a820b12406b6555f7cdec78. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/NLD682004444.