Harlem is a neighborhood in Upper Manhattan, New York City. It is bounded roughly by the Hudson River on the west; the Harlem River and 155th Street on the north; Fifth Avenue on the east; and 110th S
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 0x1bfc8801d8b08760240d637636eba0a0dc260ec3a65b6c399de422ecbe8f3a52. 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/217ddb3c-fc35-4606-8c6b-db075cb2c275.json and https://artists.proofprofile.net/proofs/artist/217ddb3c-fc35-4606-8c6b-db075cb2c275.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 0xae26a3428fa568ab845acb24d534491e4a39c1a5c6fddc06abcb281071f22265. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USTC80908612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669c43e71672d6623b6376491363797c5b0d2caa5bea30b6b047a718581bf61e. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/USMTD1000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da5dbccf91841596b10ab01b1ce65189223fb9dae05cba21bfe1352194f3801. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/USMTD1000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd681b5ab95cf07fead4fec5d67888431ec840eb6bfd6029ac7bfe3f8641529. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USMTD1000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b25393da60c1f8a63511b01b856be25ad7d9c009d047d91ca5b010e45cd3afe. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USMTD1000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde42dd7a46cab509e765170b16b0c5dec2805caa0f557cf8612186cb9ae6cb32. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USMTD1000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99cfbb58e34bf8d653573eea1efe6bac394f33afc1e2e68d8d242df3f06feac4. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USMTD1000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6bfaf59f1d7a7c3c224d5f5e552227f21bcec5a744e8f5bdb0b0ca8257cfbca. 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/USMTD1000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd948f72c8ac732efcae85edc27b4b0e16f86b69fe3dd86acc5de98abc5fd2306. 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/USMTD1000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5981f4bdb89cfc405077f530707b900b810eee2e5cf57508956455712060917b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USMTD1000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf77044730cbef05e560e66fa0567573bf9adfca10533e2ed9615f8935c0a324. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:29:15Z), 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/USMTD1000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d81cd75682409f3bbc629879347f30092ad5a6523fa4b85f5a445de7b6b0439. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USMTD1000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3ee7d1ab3879438f9db4217c847c83c20a37112ca2b3a26a7732d6f64ce570. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USMTD1000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8c9c0dcd76ea8c5e5033d61bb9a61152c38fd3ef74ab39624178c839013145. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAEB1956120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca2b0b8f9d08e8231fad2e4b3dacdf5c95b982d0dde60e5701f9228a8d65d66. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/TCAEB1956121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427e831d55cfe07709731e5e03963619fda8898daff2672ef7f16273c0f7eca1. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:09:15Z), 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/TCAEB1956122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e445c91769843b3e1e4a51cdab85eba5c608fc432c17e8e21ba83d0ba67b0c4. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:11:22Z), 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/TCAEB1956124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb6ca278b16c55ba1750ebdbc7736138eee88b7afeb53b03761e270538a8919. 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/TCAEB1956129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0ec6296b25ab37f0ab21930035734c1705122a00b170876963e427be50dd27. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAEB1956130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7971569e623a6ce050672d1de150619abbf1bd1835460e7223d2e5989849e401. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAEB1956131.