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 0x2c8c6a37155576559211f09ed329a5725f5efecc0e00447e917282768224abc0. 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/374f87da-4aaa-4dc0-8732-bb968cb6838e.json and https://artists.proofprofile.net/proofs/artist/374f87da-4aaa-4dc0-8732-bb968cb6838e.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfab1523b28c53dc554701c9a79c2505935d53f70294570f1117e16207e10e06. 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/DEN961204750.
Bewahre uns Gott - EG 171 - Arranged By Michael Reif
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926d93f22854931bbe8a2d93eb2332c7f34e55fa948ff27555dc9f3fb95f4244. 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/DEN961204770.
Großer Gott, wir loben dich - EG 331 - Arranged By Hans-Georg Spiegel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6168222e8d08cabb7cca573bd5c19a4ede49ae91807cbb94625057b44d4e52. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEN961204780.
Lobe den Herren, den mächtigen König der Ehren - EG 317
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d21e4122971f24ac47eb57f5807d0ad95c1a5d72211bda6d1bc83aef614f61. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEN961204790.
Laudate, omnes gentes (Lobsingt ihr Völker alle) - EG 181.6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0195e0edc02fdad14a679a1ea4c5b677f6ee80af482380e624e100dbe1533609. 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/DEN961204810.
Geh aus mein Herz, und suche Freud - EG 503
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52980b30c5974791ab0f32e41a5b093268cab2cc8bbdac6315a64d12a59010c. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DEN961204820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71bfa07bb0878e493a6ad25b727b51fc23f536ce51a80f5a7d740db35e632d7. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEN961204830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1fae253597d9ee92f6bd44985dd351e89111e4d75a7f7ea7c9ed027df3f551d. 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/DEN961204840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464b5e1a3367bef14d5476ad7023f4c8fbb16fd9816445919972b749d167f2c4. 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/DEN961204850.
Eine feste Burg ist unser Gott - EKG 362
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f37fad48c06bb8b5e764ac4c522011323188c0d454de85c0eead21d7298f317. 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/DEN961204870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1577b9761b124f9fae8e96fbbe8939449cf62937d92b2d5514df413a02aebb35. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEN961204880.
Von guten Mächten treu und still ergeben - NGL 276
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386579d7d7203dc19f27f6202835c4a63908960abf1bd3a19f1a14723309733d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEN961204890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf798484ff7eacc29424eba3b77c5ab922b37a438a7a1119261353d113d75ae8. 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/DEN961204900.
Arranged By Albert Schaefer: Ave verum corpus, K.618
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534d76c1dfd98d8624f80f977df972e6baf842dba341ac7ccd4d393a0c86bb3c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEN961204910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd542ae488d93d545fc85d1ca532f41c3cbef9ed7b1c2d4c12f078bec8364cd. 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/DEN961204920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98f04fd67b7ecd1181735264001a8512a4b8d661110b54483afce75741ec8a9. 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/DEN421105001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab216e5291df1cd40d2ea4d9398d7747e882c59295b1278d619d58ace6769a3. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/DEN961204760.
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 0xeee89e4340ed4ec0509fb81933da22603cec9f2744e31af0aea89f3c33ad0f0c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEN421105002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111128176946280bcb4205cfe13007cae01a8cdde635b504603de564754021fa. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DEN421105003.