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 0xac43d6b1330126016f4c6c6feb12616dbb73e5a8ae4c983e9c70a488bb55f789. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/096fb7a4-9698-4879-98ba-aedf7d84042c.json and https://artists.proofprofile.net/proofs/artist/096fb7a4-9698-4879-98ba-aedf7d84042c.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 0x265b7d946c1d8bd126d040e30a762e6bdf8bc52512ce39d4da2569a7541952dd. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZHN92520536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf8740e7daab621ccd3fff21262f2c2134581531244954899a6a177f3a11760. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZHN92520537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848207cbe7962d8ae87f5dce52ebe57d6df59ebca48cd39391e7b163f988a4f1. 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/QZHN92520538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7321707f1be00523006f9f2a0e26174f5ff579e50e590215361d73933b530c. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:25:58Z), 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/TCAHB2381168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd95869009d09673992d5e4b0d12837d7e3e331b713fabdcdac65129ce1596a0. 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/QZHN92520540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12aae9ae05009a48d6bc39018e6f766a6275ca9b5975e0153719846ffd980cd. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZHN92520541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80890c923797d882cba0dffedf938a466f0ca66b11ef023d3afe10ae36877ff0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHN92520542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9b3c0895395c99e61283435b26042efd4bc0149e1003d25a7b1e13ca147953. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/QZHN92520543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34b4eb7f1f38b8a7a3c1fde96b8aa67be6e68c3ddaeb8f75f8b1d06b60c545b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZHN92520544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb98c779f5f1f77b7452a213a6e6987cf3fab1d9fedbc962d05d168aa6493f4. 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/QZHN92520545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80a6f2c27e973545587fb0349ef0797a7e39585af5055136fc30efa0ef852a1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:27:00Z), 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/QZHN92520546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90aab867591c57f22e2906fc782cf5c04ee30e547a417ee8b86cbeedffa8c31. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZHN92520547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a88131e29ce7cecaefe2e988fb5eacdfc6458d473e4a66b17aa75b4391983c. 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/QZHN92520548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382d34e5dc245cc67d034fe9d4d214577097b405b9893d4afaf47ab5edd700cd. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T17:31:03Z), 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/USGNV0701219.
I Take Respect (feat. Lil Flip & Mr. Silent)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ef83e967e676fb24369841779fb84abea8e347bb59fc88d3456bb832c896a5. 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/USJKM0704204.