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 0x7eff6ee82bcafb1964ee16d4a00b0922c55e99f65133fddc075c10eefecdbab2. 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/c60bfe8f-90c1-4b98-88e6-65fac1b9aa9a.json and https://artists.proofprofile.net/proofs/artist/c60bfe8f-90c1-4b98-88e6-65fac1b9aa9a.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 0x950dac9ba1e71b9be00f7ec5a0150f8dd1d0dc005e258dbf37d4da1c618df962. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GBAKW0201033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2eba7e2ee995a633876ac123149c489ad2803bad2fee740a8b97dbccd87fe8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBAKW7101030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f2e9ca9c1d75bb1e4b106c5bf364c06ebdd5e6d2194cbf11ce52e4720cbd09. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/GBAKW7101028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5672fe5553faca61d758639ba135554db39e65f62555917ce946b277377c8c. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GBAKW0201034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3d0514a03c307ed8b898704d12ef163388206de20752ef3dc6411064a097fa. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/GBAKW0201030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d1e016c61de6b176a9f5386aae8a7f40f40eaa92eeb43dedc88673b88c53f5. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/GBAKW7101023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2bf60d78b9da5155c3df832c5077ac36b29e71aca93902175fd0542ace1c69. 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/GBAKW0201031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66ceccd6baac99315840e149a1d7cea584abadaae164245c910dc7186c29105. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/GBAKW7201020.
Live At The Roundhouse/Previously Unreleased/Do It EP
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713823cdfb9ca9d6bf96782087a344d56d04331432b11731fbf1f1f5ff184b9e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GBAKW7301019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae6e5ecc138274fc372506d107681e57896912e485387c32871edc8961644a7. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GBAKW0201045.
Live at the Roundhouse / Previously Unreleased / Do It EP
Live At The Roundhouse/Previously Unreleased/Do It
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6ae30211734b1ec48f20779123e0f43507e9fb75a128c84815d26b32d26a12. 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/QMBZ91344978.
Lucille (1970 BBC Top Gear Radio Broadcast)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d9842d67ef9684dd33c1030bc7f9ff38effd3f98fbde01f57229d47dea2e32. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QMBZ91344979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce4ca420b838a2144eeaf134c3df8da6c8f3957e7356df01349b4afdf87580d. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/GBAHW0500626.