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 0xe8444f39a84e53de16214df91e262efca4ea07c0eb7fe4a608255d46eb020882. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4baacae1-945a-404a-8014-ac16f730659c.json and https://artists.proofprofile.net/proofs/artist/4baacae1-945a-404a-8014-ac16f730659c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Das Jahr, H-U 385: No. 2, Februar. Scherzo
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 0x7da31cb8d93935988de4505900c726659bfc57dbc09e8163b8707ad5997a6f9f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DENI62200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfeb9a5ec599811bac2da04751aa5be116cf4a9cc1c93c556eaad35c57b89b8. 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/DENI62200030.
Das Jahr, H-U 385: No. 12, Dezember. Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e37b47bd23e407a8173d01c905402aeaa6d615713cd7d08a096662f007a48e. 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/DENI62200039.
Das Jahr, H-U 385: No. 1, Januar. Ein Traum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1d046983852ed9a7c7a04e9bba44c95fb35bc2e17d8e02b44e3681bcaba2eb. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/DENI62200028.
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
Das Jahr, H-U 385: No. 4, April. Capriccioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50305cfcc86efeab8b07f9afb7661d05359d1fab37f5e1ecf38a6daa06f18875. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/DENI62200031.
Das Jahr, H-U 385: No. 5, Mai. Frühlingslied
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52e97de96d77e44e5ab3f100a04f18219d0125f9786b71b23d24dd119a9e1ad. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/DENI62200032.
Das Jahr, H-U 385: No. 6, Juni. Serenade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c5f6757ffdd0726ecd70cc676f423556c3e6cd68e5eafd4bdf80cbfbfcc42c. 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/DENI62200033.
Das Jahr, H-U 385: No. 9, September. Am Flusse
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ecb74f2753997d30015d094149cb7ff6a5a2d8fa92c6731c7857068b9b6130. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DENI62200036.