Artists United Against Apartheid was a 1985 protest group founded by activist and performer Steven Van Zandt and record producer Arthur Baker to protest against apartheid in South Africa. The group pr
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 0x8dabffe5b1600a1e91ed15d3406221c431e22a609e25ae8e28a55bbe605fa0c1. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/10526ecd-3246-4975-8c47-cd7506173809.json and https://artists.proofprofile.net/proofs/artist/10526ecd-3246-4975-8c47-cd7506173809.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sun City: Artists United Against Apartheid (Deluxe Edition)
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 0x0450b2b49484aea489ce0f60e88664f2aeafad0ef6e1eabcc3cb6e25b5779cab. 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/USEM38900298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1124a7cd45d1ab2da08549608db3ef76af60219e2a5e626275797856de0568. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USEM38900299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8a5e8c3d953ef0e9a12ae03fc7c0fc6bc7bc6d7a9a2020001fe51bf5397863. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USEM38900301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39308ebb5bdd85475d5aa6beba8564e8ddb2a0bed736abf63b31188281c80680. 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/USEM38900302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0d226228523ee66745118e9320996a5a6ff143c58fad893ee1c4bd50db04d5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USEM38900303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0240436a27eb99d81b52f21d16559a526d5feb84bd7572a4776127ee8f59c0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USEM38900304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444328cea42fa55c414b52412b27cd084d1f4cf9ec2476dbc1a78b8a1be08f8c. 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/USUG11903010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0450b2b49484aea489ce0f60e88664f2aeafad0ef6e1eabcc3cb6e25b5779cab. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USEM38900298.