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 0x8c5e7c075e6788734096a3cb15f84ca433988a113f9e30215404a7d83a9f4601. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/074f7af2-d4b5-4661-8865-757cd20185ba.json and https://artists.proofprofile.net/proofs/artist/074f7af2-d4b5-4661-8865-757cd20185ba.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Die Meistersinger von Nürnberg, WWV 96 / Act 3: "Verachtet mir die Meister nicht"
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 0xcb4f823d80a8ac1eee3054f2a5af5bb4f82ff6d662c3aad454fb582dffb954e9. 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/GBF077540342.
Die Meistersinger von Nürnberg - Act 3: "Morgenlich leuchtend"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a33fe17329c217549fb7e9a61da687df45dc9283b9c910e7ceebceb149acf8. 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/GBF077540341.
Die Meistersinger von Nürnberg, WWV 96 / Act 3: "Wacht auf! Es nahet gen den Tag"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68bcae32bec264d9cccb81dc136cae6fe947e556fd97ab6ce60db3e11d4907d9. 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/GBF077540338.
Die Meistersinger von Nürnberg - Act 1: "Zu einer Freiung"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed685524c2a55ee89764a2b18a77d1fabd35597d74abcd005654b343fca63ccd. 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/GBF077540307.
Die Meistersinger von Nürnberg - Act 1: "Nicht doch, ihr Meister"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6276fa48551c1261933f2a1e10a60b65794520e901822aaddc6ec69a4aefd558. 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/GBF077540308.
Die Meistersinger von Nürnberg - Act 1: "Verzeiht, vielleicht schon ginget ihr zu weit"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03423b265e953dc442e01029d5ab745b64f41ad06650f007b0ab785e05cbecd. 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/GBF077540309.
Die Meistersinger von Nürnberg - Act 1: Wohl Meister! Zur Tagesordnung kehrt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03cc2c0cedf14ea45d8230a294410f6c36ef1405fb4303954905c05e209a97a. 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/GBF077540310.
Die Meistersinger von Nürnberg, WWV 96 / Act 1: "Fanget an!- So rief der Lenz in den Wald"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28237edb0fb00b19eb342bb2121cdaf80b24c5419de1d1ae7b747eca752b71d1. 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/GBF077540314.
Die Meistersinger von Nürnberg, WWV 96 / Act 1: "Halt Meister! Nicht so geeilt!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c04dbe3dc2a24fa40f7e7d3743800c47b494a8285396b3f30545852c03e927. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBF077540315.
Die Meistersinger von Nürnberg - Act 3: "Morgen ich leuchte"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e4fe62a11ca99b97adc6dd9984723419d129bbed8bed5fbc641a842e45b528. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBF077540340.