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 0x9f4f96c126ed2c3563482656031027f4f4d063722161a0b1be60a9be5e9a3225. 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/1986d788-acae-408e-ad93-2cf242c92f2f.json and https://artists.proofprofile.net/proofs/artist/1986d788-acae-408e-ad93-2cf242c92f2f.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 0x3948e64a899877f04ca958a350eecba29bdb2f76001e96bf6a746de5900c52fb. 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/NLT2H2301228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358a90a93846e11c64739cc11eb225b6427c30764ec7f4504173f9fc9f047b78. 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/NLT2H2301230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da2f7d89807f43e090a1bb9e078e27f3c2e4e492ea18ec2a7bb716642a1fa27. 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/NLT2H2301232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6dc05574c1a35c3aa073c6eba275abd270bbd0628022cb415bf0398c7b5aca7. 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/NLT2H2400580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d571fa62a85db71911afd09042831393bcd68385a7d095f1828b4f87072894. 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/NLT2H2400644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23db845f9559829df0a592d6204e28ed204499953973d31bf799b7514eb47bee. 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/NLT2H2301154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ff9fea05b869c484997010d7e3148bda8ba78e22c0f9f421d7222e6f0d5cb2. 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/NLT2H2301226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624f66c69ad6eeeee9451cd35c112319d23bd621b0031c67f941422ca111147e. 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/NLT2H2400282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1884e86390dce3a1755bb3e664975bba4a8ad8beed7179102e71b3c4ace38e. 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/NLT2H2400262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6626af8419324b9b20ca3ddcd2a4d9feaa6e1684f8cf331050758b851ea302fa. 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/NLT2H2400150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde569b306da9ce5abda1b65146e61597a86116c27737d7a0590039d13477e17. 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/NLT2H2400210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf591a39c2e89436adebc4f7ba0a06b6123a25a6446c732558838360b0b59273a. 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/NLT2H2500238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb9a1c0ffc0d62fd2374c7d6f4960e300552237979ffe0f638af22084f1fa3c. 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/NLT2H2500175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9efa82f2f063544073d84261f7dc92e9d9d64da84d267968075ea8b976bbd2. 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/NLT2H2401249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98df09fbc738d1d3c381ae16f95def520d79038d9b6a2b7bcc7d9c49f425ccd2. 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/NLT2H2401151.