thumb|250px|False Heads performing at ULU, London False Heads are an English, London-based three piece rock/punk band, consisting of Luke Griffiths (vocals/guitar), Jake Elliott (bass) and Charlie Gre
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 0xc8922c94b22934596b3dd670d9fac1b9930fc603b1dd7063ae650a494bb3f341. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/979ffac9-48ac-4441-b375-c7ad1d960f95.json and https://artists.proofprofile.net/proofs/artist/979ffac9-48ac-4441-b375-c7ad1d960f95.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 0x8bdd8ca62dd35f828c120513dcd61894a4a7f1f14968e800dd22b0fa73e4e9c5. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:51:20Z), 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/UKPNM1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a40a9650736a96665cec167e8ca83bd7b865e60e482b085d3ec093471fc3c6d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USL4R1919056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb9ec5048b2c5a7cf02890ceb4f88616e07a04bf423ede339071c09196d5165. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/USGCH2019719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319d3676dfe573cb6deb71b57274c9c47f9b27a12810fc3d8f0dc618fcb71f9a. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/USHM91950753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d0bffa22037331dec363a3fffdf30f08970261611843f55b250c592d6aa7f3. 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/USGCH2019721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a46df3abbf18c8fee2a0f48e6cea125f66a7124e80e32cd401bfa9be2b3af4. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/USGCH2019722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4ef3b188d457c2e7da1ec96ef120e6ef7804113ebc6d882d2fee30fc0d0e3c. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USGCH2019729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8905ea66242553ae8a1bb71876d92ddd0f850748e36ac4fc4d0ece30894b104. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/GBKPL2035286.
From a Blackstar (Live From Blackstar Studios, London, 2021)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550c77729ed9254659dd94aca6112eae711d73f723062275684a09021cc47189. 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/FR2X42287552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b65d93e3171dae0b673fe27d79c8550ba3163da1b6dd656d6265bd83076460. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:28:11Z), 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/FR2X42233855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550c77729ed9254659dd94aca6112eae711d73f723062275684a09021cc47189. 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/FR2X42287552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d95aecf27a813c6754b709b9baa3885b0303dda1f614fd64a63c16d5f19aa1. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/FR2X42287553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd187415447ca617992a7a1342a735e0e75a05be6d4b397512f147cbd52532d5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR2X42287556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef50235d95d42da21c5cd781151a45517bb0bab3d2cb10b0b4a8acb1ec323e9e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR2X42287558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1723fe2b52cab0e71e4e7ac088019cf86ae8e5c675cf46e61ee9408733488a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DGA062345732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9404811b08820e5e0f4dc26b4ded5fb6c26070b45fa8162cf88a6d17b128f2. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QMFME2420613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321ce8e46b3cfe8e283bf38bcb9aa91e76cc82b5b9e9dbb33db7c3a0f15dd25c. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/UKNFR2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c46c2796192fc98ab6c13502d734eb49706a1b63036f7717577cf7df95e5a5e. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/UKNFR2400003.