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 0xce07c2024e035e437d34766e56a7035fbded68181c3396db79e47e217307bea8. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/96220cae-65bb-47cf-b497-dc8deb6b85cd.json and https://artists.proofprofile.net/proofs/artist/96220cae-65bb-47cf-b497-dc8deb6b85cd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Pyrus - Alletiders Julemand (Musik Og Sange Fra TV2's Julekalender - første gang sendt i 1997)
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 0x243234ccbedb15eb2b0499cd8f49ecd05883278c25b8a5421c17cdc3cc7eba2c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DKAXA9784005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158bbe3ca2d41f09ffbd80e4b678cb626f8739ae3a964559e0c849359f8ef0b7. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DKAXA9784011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0f4ef974916c7b8d8d078e979870cec50439dba35d6f67b3565a6d27ad1c9b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DKAXA9784012.
Pyrus - Alletiders Nisse (Musik Og Sange Fra TV2's Julekalender - første gang sendt i 1995)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6d29c23cf5f9b019c51d6bfd95fc2fba1a2b52dad17ebb2a7d3b907ccd5d65. 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/DKAXA9589808.
Pyrus - Alletiders Jul (Musik Og Sange Fra TV2's Julekalender - første gang sendt i 1994)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2bfe2557aeff606899425a91e9fa64e452e7a69f4b87f6370a67cdfc9189c3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DKAXA9488009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4314c1b9b02b07325f2b7d26ebc22f8791cc5c85b4feceea0b74cee14a602f. 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/DKAXA9488011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e106f4e63f9d83b1c8bb1a1efcc76ed18ddc4940154623d3bbad55e634e4221. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DKAXA9488012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bdb00a1cd27357b63ca415fd627f4157b69f41406ca6e316a557e566dc5a1c0. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DKAXA9784014.
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