Harlem Spartans, often abbreviated to HS, also known as Harlem O or simply Harlem, is a British hip-hop collective based in Kennington, London. Members of Harlem Spartans have acquired over 100 millio
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 0x560259167430ea1aea067e8e988be3e15454529a9a5469ad365700fffe14097d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4b3b520-27fb-4395-a314-bd18e716a716.json and https://artists.proofprofile.net/proofs/artist/e4b3b520-27fb-4395-a314-bd18e716a716.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 0xbabdf2b42416933e6069a001057b1956d50c4a25f0631fcd2837971cfc673497. 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/QZGLS1932660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4644ed62f7f0a8df22eb27834fa8f3d795eaae0fb73cefa786cae4c8d45e0e9. 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/QZDA71994531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7afeb862f93dc818b40a2406e318e3669fabe70cb906cee4c426b080353cb5. 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/TCADZ1810206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92aa0e86b5f66368a02f24d792de31ca35aa7a47b5ade02f038f5342357942e4. 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/QZ8251856986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09cac2512c83dcd592f273af1cf6a17f72a9373a8452ea02ea0079cce3ead02b. 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/QZ7D91738037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5214707da02797f2b141a91679f690c548f4e6051c26e83a614714fa3fee8fa. 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/TCADT1882644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2669eb3c1df14a7d5b6efa5b116b6e318b66b022e07475b8ebf20f01dabd57. 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/QZAHP1717990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59eda3c3ae2658c1bc3199365e8d3c086e923084cff109dfed1a7bd508538616. 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/QZ8251812081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e25e49eea396a058f5e924e73c59501a74bb6e9bbda8bb6c1ea0b3f5f0c6a8. 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/GBKPL1793729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8f68165f93880f6323a53684ea39e3c275922c730591401b5a51f6ca5875ba. 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/TCADE1760285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01c703c01825d7e0f38d39d3c3b27bc6cc68b07c3f47935097ba7eaee7ce0a7. 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/GBLFP1752252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3c58fa95758b52ed2afaf13ec3c0af862978fb15931ffacf676118071091f8. 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/TCADE1760294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e73525c717deaf579ad7f64cb3b641e4c505d9ca9fffaeb54d29a88fe9d7ae. 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/TCADD1767296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bb320879884cde58bbda146872a9a2be16a4a90b740254f7d5e023597084ac. 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/GBLFP1706933.