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 0x6d9e9cbca3a57017316eca0a1a768b807308894ceb53478826eb810936c61398. 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/4ea433ec-3006-4472-9217-4fe0a41f96a6.json and https://artists.proofprofile.net/proofs/artist/4ea433ec-3006-4472-9217-4fe0a41f96a6.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 0x16d1089e02ee4219b9e9c0c17a89a88e7038be5244f5a8a017493a45cc7f6743. 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/QZNJW2359723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798817ca6517446392a96b83b988011ee6733f56f5e9f65ce1cd814109bca145. 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/QZNJW2359724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfbda3e2727be25c25c0b5311c74c2c7f7f4b630e0287c53e875ed71e29d0c24. 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/QZNJW2359725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed41eb4d232ccc34e6a3e551985635ac387f80e6d5c25ec14642ddf80d41a4dd. 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/QZNJW2359726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eaf8933a62369f50038e128526aae3749492d65cfdac5c9f0e126377550b50c. 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/QZNJW2359727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67eee586369194426824f4dd09f66f0939413bbe6a07c0b915a20bf8ba8240df. 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/QZNJW2359728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e03b0c50dec8502e391d073381fe7d9f9c79756e49e870c82f0e5dd1136b708. 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/QZNJW2359729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff44b901b074971307f728625fc20a2812f94ca3fb08411f7edcdbca04e49915. 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/QZNJW2359730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f57248f15a5ba8aafa9c31ad4eb00dab447a529249e9a72bf8c07b488e250f7. 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/QZNJW2359731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7d752aa88d8e3ec4a0b77b0f44604c4d7955e799e9a940309c7a153953489e. 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/QZNJW2359732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dcbd47ba46d3e20a0a10433616678c46a32e93c9ec4761ba176dafb109f56b2. 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/ES71G2412999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf052f302d836e49bb60e57ef1f9bfd0d12078d55e536dac5ac93c79af1f491ae. 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/ES71G2412978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde1208fdc137e11219be869344c83d69f04bf66ea15433cee5ff892b5be3844. 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/ES71G2412973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda9fc5e2da93fd9f64b6d65fbd90a1dfbab687d6ac9a8a6bad5356985efea18. 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/QZHN82460796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe9d1d64be1ea1fc474c1d0f51ed0fdc989a8b232fd53a1c3c1ddac40b4eee1. 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/ES71G2418884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29cedfe74e6edd6cf9723d1a25fef1ff5b332a50c509a411a98603d0bbfe1f5. 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/ES71G2418885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e984379c6e12a795693ae31364f922c1fcc86999f45c63c015cd387173ff1a7. 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/ES71G2419514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4f0456850684f90903dbb1b98e54f7af6830244f4bd2205cce7a8057f58ed3. 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/ES71G2419515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b2ca1959fe6127b41a845b57b12b9a163cf1bc5fb5a086d54933772a9a4ef5. 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/ES71G2419513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542da7302537ff197d96785344105ec46c213f2601d859836065a29f8604adfd. 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/ES71G2418891.