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 0xaf5277584aa739a033b22e0c39e39772c5eaa765323907f621163c19dd984a06. 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/31ac3444-eeed-4060-98b3-0139ce4b8a6e.json and https://artists.proofprofile.net/proofs/artist/31ac3444-eeed-4060-98b3-0139ce4b8a6e.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 0x266055a46c221526a2a6e0daef0d67c54d58801df69bb6cfd418d3242f4a9f9f. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/FRX201629901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a524f06b2b8d78be9a5b96557e555db7eb882c79b1812ffc1c1146d5f0a26e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR2X41759773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b87ebe6c8dd4efc07955bc4c520cdd209260fd018f3b3d00e2b373bfdcd089. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:18:40Z), 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/TCAFP2174987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b5ec6ce2582922e423828789f257a187b4c261f5b1b21aca2d7871ae284e7d. 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/TCAFW2102755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d10116d85b363200dfa1abdc37e5b0702e9ae8195df0d68ee8d7d71bd1e1b0. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/TCAGF2234269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8824798242ecff890cc331527574fd273e6e2bfbac730b4601823f6fe94b48f5. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAGR2299342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c5a48bbbafa3740c3b3097c986dc4f78da59ac6f06ac5935bab9dea8f15967. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCAHJ2383803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963d52b6a814802555d739456ebd779080aa60734a59b0258e48550a22b5b1bc. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/TCAHN2360616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8780489f831b2edce90b47fd792a881e413cd7a6ea24798856a1024897e0699. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCAHP2385842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61dce12bd9f17af8cf6bcddc519651a365a80774bc69576159572994d588dc41. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAHZ2418149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87c713ce97328105a8b88f14e9eb02cade25545c01e760031cefc59954de3a9. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAHZ2418229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54c491b7d707d720b5e0fc5db8d18670d42d485a3794342576ad0caa3656f99. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:41:33Z), 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/TCAHZ2418341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76b18d36c9df62a63716942931eb94eeab0a6d937bfa98fb06a29d1d0a61348. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAHZ2418373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e42dff3e860957af71c078fff90242400dfc905785fd01369c5b93c3ea474f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAHZ2418394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd29ac836fa6735ed64fa91a9089eb85fda67add46cdd5ec00c3bde834e570d8. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/TCAHZ2418410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8bdcf0b0986bf621ab861a9bafd7f186826166a84fd42f22cf6fe084ac00883. 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/TCAHZ2418440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeeb71ffccc3525c2430a0f68d5b25914128917afdde5a2f37e04c34edaa13b9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAHZ2418451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4bd49a4e9dd1c07aee94894eaeb27eb7fbdd82d6027bad76f137fb244173f09. 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/FR2X42524898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3d19da48196b727addd22479e4754d68c83bd96fe3fc622728fd0b5cda9fb3. 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/FR2X42524899.