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 0xe79d93a4bd0e30ff74bc30dca00f5f849a8e1c704c41b001dac855b68ab1040e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7cd7c937-67ea-4d85-b2d9-acb26b779ddd.json and https://artists.proofprofile.net/proofs/artist/7cd7c937-67ea-4d85-b2d9-acb26b779ddd.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 0x43af1e23e43daeec2598ca0618d22510c5072dc9bed39586ef38e9087903d737. 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/BE5KW2300382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300091a2ac98c8f11c7d94dfa14fd2ece869462c9a938fc4974fb9aac3b83b41. 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/NLE712500224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a691c10c460f3d954742e808b9eadcc757dc2c1588f29e09d64bb55b8aa82e. 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/QZK6J2287810.
The Reflection of Love Singles - Brasil 2023
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43af1e23e43daeec2598ca0618d22510c5072dc9bed39586ef38e9087903d737. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BE5KW2300382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300091a2ac98c8f11c7d94dfa14fd2ece869462c9a938fc4974fb9aac3b83b41. 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/NLE712500224.
Now We Are Free - B Jones Extended Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e430f6b055ef2cf9ad2b6f7198bf007ed4b04671648607858cff962ba9d7e0b. 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/NLE712500223.
Tomorrowland Music - The Adscendo Singles
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be5a47e968c86609c2ab388f37dcae8b9a9b7cea50a7a37fc426ea718c504a0. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BE5KW2300237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd5161196d876bd220095cdb1b0945aeee3f913b367192106e6d5dcfc72f420. 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/GX3Q92542374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62c5c3666d4685eee2ffaee1c8b7e7155a476de4dcba0d4cc9563a0c5b1ae44. 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/GX53U2357701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb8817846fe0973d11aded0f9cbaf216a9ded486c07bfb22b1ec33e5a32513b. 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/BE5KW2400470.