WhoCares was a supergroup formed by Ian Gillan of Deep Purple and Tony Iommi of Black Sabbath in 2011 with the participation of a great number of rock artists as a charity project to raise money to re
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 0x226a048bd431ee457df8cb67d8b60757aba1445046bcf179785324e06520a8c6. 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/f65c913a-ca33-48b0-b106-46f3c2413003.json and https://artists.proofprofile.net/proofs/artist/f65c913a-ca33-48b0-b106-46f3c2413003.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 0xc45f03a37fcd4fc5e61278b51179d0d794be025438abb9aa2c85eb57b4cb4d75. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2100051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f126bedabe983209d1a21ef61064808c66bac50c71b04eb2e7a6108e65fd75d. 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/NLT2H2100340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf955e2c5c28c0b19e0a0256f9ee2ff8c6c15148a5b4fc8deaf76d1592b4a0bf4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2100453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e9415469ef5b0e7eddca1cb5aaf01d0c301edca4aa6b9da0ea5e0bb194de67. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMFME2172416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797dcf850889c71524f56b3d7c8acaf9f10bd375281fa7fe4b4eed0a0f759156. 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/NLT2H2100727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c3b0e6cc532c51731efc3d781a892f56cb700e9e24cd048c13fb26ad5973fa. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NLT2H2100903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e50ce629751ec290eff214fc7d37a9683884bfe3cb81953e7a3fee879109249. 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/NLT2H2300746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd667aaecceb507455414aed659b256de46d9be74a10463425f461e66c454ecfa. 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/NLT2H2300853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd5f6f3f089198f3839a52b364481d3c2501d39ea390178db43462ec7791a1e. 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/NLT2H2300999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde60fb5db8af6e3c4d0c1459784dd035f63dd167cef6129b440dcde5099b219. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/NLT2H2301237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c63bab812ad5284d7c12944fa453d4285e8a6f58d1e6a3fec9f7379c57bf5c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GX89G2485929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa8d46b64b500805ca7e4bd6d78a72d57c2341c30e59d1e4a06b5641a17a570. 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/GX8KD2429485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864356885f379cf9a54592c35fbb2602cbbc5cd501a8fb4cce7d2e4267a12f32. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLT2H2400311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15715cf729434b13f188a5e8e526df43b7153b8cba11030d3a8bf677719ef017. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UKRVV1900104.