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 0x05b346942620bf23e541de4456ec612604f527573fbf906d3c49d01826e4a74a. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/536b9d01-b89b-426e-8455-b3491954b846.json and https://artists.proofprofile.net/proofs/artist/536b9d01-b89b-426e-8455-b3491954b846.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 0x3271a8326b93ac459e31bbf4c22ea40ce8caca8832fc36dd9c4a1c19d951c217. 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/DEAF40900311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39356dd19d345b44c760452e1cbad9b8c2b911f6a23348010df36adb2b5c8a4. 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/DEAF40900312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe56bdfb447e1ec1d7c2656c4e85ea0f6145916b3e9d4fcf176bfd7fc748fc21. 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/DEAF40900313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac3e42fa7d667a65304a679d871c0d9ddd4beb2e03aead946d7ccaea98bdabd. 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/DEAF40900314.
Paraphrase (Großer Gott, wir loben dich)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e681c562f6650661b081178f0233e91ad39d90c5b199fa377857072be831f9a. 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/DEAF40900315.
Lobe den Herren, den mächtigen König der Ehren (Choral)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b184b25d19db517a6f2c8f9d2faf9ea109ab293a1eb377d1edfaae001fa0a7. 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/DEAF40900316.
Lobe den Herren, den mächtigen König der Ehren (Fantasie)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f06a24fcdc446d596d2314a5314aa07e578887326900c00964aefae605bd75a. 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/DEAF40900317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a3b06967d1e54301206bb24eca22aef0bb0afc8734694da63bc85202decc14. 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/DEAF40900318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc968821a72ab4af10f1a5d0a9537b5cec7bc9c5ac7459b8cb10bd7934fed0fdb. 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/DEAF40900319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65014c42cd5fd6a6e75c2dad78f78844fd38d11b69941bb41e76d9d8f8fc8292. 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/DEAF40900320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a073c987d3c5c08acdef829bbbc9766714793c08008169ef6f3e7cf313d661. 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/DEAF40900321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01631a67c2e0ce7dfe2514d9f8c31541d8521dd7f62e745eb277960f29723d35. 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/DEAF40900322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2741bf679c3e100972f9fdca0c5689dddb21cb1a5543d7d33d78063fa4e02911. 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/DEAF40900323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c4ddf515e6d1ca6a2511001e33ce6cd7a76c267a047cacb1ef5305d4de0b7e. 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/DEAF40900324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df950ee9dea7d7a77da4d211695c830e17922883234618b550d1ff6312ebcb4. 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/DEAF40900325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa27285fa6d96070b8032a1cbcd3c1eff119543c66949138a467d3d544ec4ee4. 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/DEAF40900326.
Hymnus (Lobe den Herren, alle, die ihn ehren)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a555e58c5c42ed2c3f1bc4821264078f6d2bf411d404e52ef3ea47a3b75bef. 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/DEAF40900327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f95f43fe7361aca7a4c250db4018fa3a0efe3ef2542690407c4e271714fd75b. 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/DEAF40900328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfdebd3fd9263cdd11abca564b65c3d83746f77a293abf43d9827cb0b6f6a7df. 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/USB8U1013586.
Wach auf, mein Herz, und singe (arr. for brass ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffedc93611816c9ab863b27997bcbf8b967c5edc7caf9a843ff6a3e1f5c40adf. 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/USB8U1013587.