Choir and Orchestra of the Budapest State Opera
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 0xc37b595a8d94fbbee5f57b9074e657c75169e24c105d0f862741a8d13f421562. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/209f345c-0027-47e3-aaa2-e280df82d72c.json and https://artists.proofprofile.net/proofs/artist/209f345c-0027-47e3-aaa2-e280df82d72c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Richard Wagner: The Best Loved Opera Melodies
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 0x40964a60ae06a85eb8bdfc19d8e798a93750b911fe1382454296a022d3a286d4. 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/QMBZ91350974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074359820e798b91197ee3594bdd3aaffa15063038e623f2fee05a2a643d2aea. 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/AUV401448308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c9560123860c4b0a0405afd7d241db562cee89d24d627f246f059cd1bb8aae. 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/AUV401448309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fafba8ddd1bb98ec8a6c8d5043068deac67935fdc422bb47b2f4f8af2b31ff6. 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/AUV401448310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c713db796438275582c53dcbbb7b399f98fed0980a8a71f15add357d56ea838. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/AUV401448311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24b02569e1ba97a17f5579f5e5549bcc80b90d286f34d8c35e6b14fc6f52504. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/AUV401448312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30170ee8a99e93b9d1768dc1dddd7dde03d5fe897488e0c95c2e8e50849eead3. 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/AUV401448313.
Pheasants' Chorus (Cavalleria Rusticana)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40fe223c8ed85458acce42500a1afecd63c56b72342893bb9f7d515d2b4ae92. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/AUV401448314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1561ff40748d7021429219f1c907de3a0ed814310bb552b48bf2d27a1e31ea. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/AUV401448315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8719141e3c57803120be5a121234bdb3f1407e9551f2cf8bddbb57a170aac28. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/AUV401448316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c75ecbac53dbdef89de106dc6c6fece987ea3879eaaac15edfb345794ae3b0f. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/AUV401448317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc88958eb4ade3bc32410a26afd7a0232cc2d26535afab8cc4147afa43fcf908. 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/AUV401448318.