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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fbe9b2f31c1dfacad17798a24d82252694215f71e0689955ee2683cecf13343. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec37ef91-8020-48fa-b8b6-882d17352b20.json and https://artists.proofprofile.net/proofs/artist/ec37ef91-8020-48fa-b8b6-882d17352b20.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Veni creator spiritus (Gregorianischer Pfingsthymnus)
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c997cd3f6600c2d0652b506c40a1e6957f5edfac431e0791ac82db68c08ea8. 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/DEE861902105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3de284268fd015a9588e21fcb57a82a440a79ad50bebc3e930df778f19ef3a. 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/DEE861902107.
Schaffe in mir, Gott, ein rein Herz, Op. 29, No. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401e8f3da1e009cfdf3711ea10172731810fab001479410ba7dc7a9faea1c2c7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEE861902108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf688bface9fbdd4d704cfcbb57b81dae6410e9233e38354629e3b015095f49cc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEE861902109.
In deine Hände befehle ich meinen Geist (Psalm 31 für vierstimmigen Männerchor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde87ee5ee8ed29e99aa64a1b3e5644aade0afbd62105414a9d543c4125915d7b. 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/DEE861902111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ddf72e51712dccbc974572741afd8b7c5a0f6cf9b23c0ceab38edee9a026c5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEE861902112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e747f50fe36e703eff99d5405bb4a98d6656ef88dfbb9ba4bfe1ba1a8734ea. 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/DEE861902117.
Weihnachtsoratorium, BWV 248: No. 41, Ich will nur dir zu Ehren leben
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426a889dd48fb23c714dd256d86b62399a3c9ae83e40b1cc87cc92b068a47dbf. 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/DEE861500917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8cbd8f09a0f401dc92597d1820c306f999364fac6f1325627a216ce09e6700. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEE861902103.
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
Der Geist hilft unser Schwachheit auf, BWV 226
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ea45d861b1bac32d6ff57eea3727e0e41a0dab9ea32b74d575308c97aa790f. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEE861902104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f02fe11f662f74fee8913de4492869dd2d7adf65085f4df740544cbbffcd1e. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEE861902113.
Jesus und Nikodemus (Evangelien-Motette)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b86508571e1fb94ed40e41a070eafe0bef2dc7d95622463ff04949e7ff7021a. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DEE861902115.
Weihnachtsoratorium, BWV 248: No. 36, Fallt mit Danken, fallt mit Loben
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfc83607ecbf78214e93eafa25239c6e55b31a7aa04402425a0e0c18bbe5f90. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/DEE861500912.
Weihnachtsoratorium, BWV 248: No. 39, Flößt mein Heiland
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac8f3ad8270a24ce34deeb84b0c78dab2d50c06e4c3a12a543e3cb5053a88f3. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEE861500915.