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 0x9041f9017aad7ab27aad3af4fafbe2ad784379ed66f59cf2f6c64e57fe3ac7cd. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7f97d50-0581-408a-9e8a-af1c86bfc835.json and https://artists.proofprofile.net/proofs/artist/a7f97d50-0581-408a-9e8a-af1c86bfc835.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 0x6cae80bdb9ce2b4cc2ff42e23e4a56f23b968f7744a2378d37516ce1d7f3ae83. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEB112101303.
Grün, grün, grün sind alle meine Kleider
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cbaf591dab2a0f2f7a1490f317b0bcc73be696ea21e1ecc5af185a2efe4a300. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEB112101308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2fd8dde3fb5597d2e7cd9d652fbb984d4323ac20bcf574192b4be7fef32908. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/DEB112101312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8631358c44572d1d0fcb3ce083cbb565b4fb58f0e3b6d1c656aa8ab1974c1ac6. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/DEB112101328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885ea322cb774de2a1a212d85594f3dd9b4de536f909627e1c2a021867ab7db3. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/DEB112101359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4bfed756d35e77e0c62e63c096ee24a0ad15b80b125cb6f6929c2934ba84067. 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/DEB112101362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8eb25928a365fdd26115684ac1eaba6637a66caffe47286912cbeaf2ed1d4c9. 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/DEB112000704.
Kinderleicht. Lieder und mehr für viele bunte Tage
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b031626523661ce98710aa48ea822ebf4e733db88d90facfc7384c22bd7c1a. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/DEB111101310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ccaf7652d07dc7d7e115930b4ff04fc4936b3ad6d328b4d4baa54364cb5034. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/DEB111104021.
SingsalaSing, Ensemble der Landesakademie, Ochsenhausen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdaaf57543c43b22b7d9a355dc31924a042ffe88e1cbc04c38a111e1d322b6b2. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEB111103902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad2f7572e8942f3bd70ed7c158bf7f3e1ad842d9bcbf48e618d9ee8e4bd5b27. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEB111103910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68390e2f0785bc1c76a6b7975d64e972de0ca8c7de1c58fc03fd99aa258e6d26. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DEB112000701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ccaf7652d07dc7d7e115930b4ff04fc4936b3ad6d328b4d4baa54364cb5034. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/DEB111104021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2cc61c8bcd17f26bf4038756332872030a7ba20270d22b9ddca59825effe2ed. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEB112000702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9d41e91f97d1705341186c46780e76cfba8690391fda57144dcd899a8fab3e. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/DEB112000703.