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 0xe56a5b0fb876150818c36e667d58954dfe5e6d32d6d4303bf7346279f663f2ec. 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/a74fa574-0c76-4fb0-a851-7e190eca5319.json and https://artists.proofprofile.net/proofs/artist/a74fa574-0c76-4fb0-a851-7e190eca5319.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 0x050453bdbb206b5872a83bffdeac24f307eb656fcc1b3b4af8f998cc3db0bf16. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:22:52Z), 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/AEA0D1866064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2d41f6f0379d37e894127f40a76da2b049c3f426dcd9376fddc32ae3a27027. 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/AEA0D1866065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2d41f6f0379d37e894127f40a76da2b049c3f426dcd9376fddc32ae3a27027. 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/AEA0D1866065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb29893c4044132ca57567948cda5bea21d6c4f88b17f1fe447ff2d860b1dc63. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFZ72047539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb29893c4044132ca57567948cda5bea21d6c4f88b17f1fe447ff2d860b1dc63. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZFZ72047539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a501d8cdeeb1c398b9d94fd5ab59b724710f656094cd5b995ba505b5808aac. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:07:59Z), 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/TRAHZ2000033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba6c12b830b912a292d4c04f8c5c0e03096ea77cb3c217c8d6b2b83b878af1f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TRAHZ2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982a83fb25d220a61e4a5064dac79205e45e5f21ac6ea6296d53bae90e566e9b. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/TRAHZ2000034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8987919908190cf713d2736d005b48d1dd9be14dc026b34c078c934959e56d7b. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T16:57:26Z), 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/TRAHZ2000036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfbdd20eef1d42e4885463342d901008db8ff4f82f73d0f7556380fbc08e605f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TRAHZ2500182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857499c43046fef4a6e953703258e0b64bcdef35fb78b6823a45e15c501db751. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/TRAHZ2500214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7cf1bf539a4dd5441430019b4b59f72e21ba54fb33c501d32396e784a78fdb. 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/TRAHZ2500258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea38f90a9e884eadb74f637e36de5632796246e8c193acc674fcc33225742b5d. 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/TRAHZ2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc742dc9b6bc40210eef4dd4e2f5a6a67322d31a37da5560f275ad0dfa9ea4d7f. 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/TRAHZ2200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5a3e6315ffdc8d61afb051c699968e3b40054af3a66dd58d4fff44359b96b5. 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/TRA162300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1fe1d3ed529964ccc44054114afb3ebe6214bce400800ab28f4bbd529bb954. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TRA162300231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55232f1855ca10be94654a3656e917a20b0910966a723baf3a6213761594327f. 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/TRA162300504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97573d6ab32f0c74999543ce3662e377ac7a95ae0a7d2fb0fef8fbc9abeb9f1d. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TR0062500013.