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 0xb8d79760c7b903f0a7a26ce53bb4e018e83500b9dc1331247ae2263c6ebf919e. 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/fd698422-9373-4f75-b077-06a505d9025e.json and https://artists.proofprofile.net/proofs/artist/fd698422-9373-4f75-b077-06a505d9025e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tri boje zvuka (Live at RTS Studio 8, 2016)
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 0xf4a1c8e1a36294088d8fecb0b73c94c7c066e77e561b3631bf62f208ca471a8d. 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/RSA3Z2400190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ed6f218387b38fcb4669b6158cdc0c44b4f83fcd87f01a69bcea641439cab1. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/RSA3Z2500314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e95ec324e25a64ec6d933f6b5cd7906c3b93f1b2958c4e6f0658cb83b6cf331. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/RSA3Z2500313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1987fad87933f81b079f3959de5dd8177a134be5a9cd86b89ee56c6af983acc. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:10:58Z), 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/RSA3Z2500304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9048d9a80bde5535c25262edcc066906d4e9e6b550c214b6d93242b09cc7ef0. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/RSA3Z2500306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf77dd46b88885a1d1670355f351370e4f4c8b5f984480679509ef930c9250a. 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/RSA3Z2500315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42784dd0a8fd040ea6cbe78137e5a033ebdaf7d280ff2b18bcacbb9bbada483. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/RSA4T2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690cdbefd1a56c4d8d65a332447747c4d026604d337bd994dc7b2ff6abd003df. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/RSA4T2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42784dd0a8fd040ea6cbe78137e5a033ebdaf7d280ff2b18bcacbb9bbada483. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/RSA4T2500003.