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 0x1bc2f439f939b5debe82325d664169ec89758bcb2b60977342f28265ec2249ef. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4485c6b-db4a-499d-a352-2e593f60fa4d.json and https://artists.proofprofile.net/proofs/artist/c4485c6b-db4a-499d-a352-2e593f60fa4d.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 0x97e6fb6defda17586aba97dd60977bdcfa5d2f4fa667c63d9501aad0c2601e3e. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/DEUM72413021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7983550c1b2a2924a567618f57178cd5a96019becbbec7e6b4538748e5131fcd. Chain 2 (Bitcoin): anchored in block 957608 (2026-07-11T21:00:50Z), 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/DEUM72413022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc097aabbb0bc606cef142f71e10e80018caa7a0fa9ea67dad19266631d1cbaf2. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEUM72413023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0fd38de08681573d4f1afd718053fae716f460ac0dda2d79fe5ee4b513f5d9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEUM72413024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55373a10456cd9591272139ba0553e3d357198f96b0aedfa2ec05b37f3330ff5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEUM72413025.
Bagger Ben - Ein neuer Freund für Bagger Ben
Ein neuer Freund für Bagger Ben - Teil 02
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1433293c5dde53627ac8c7be6a731342b88fcaa55eaed249b43b1e65ad7055. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/DEUM72500483.
Ein neuer Freund für Bagger Ben - Teil 03
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ea29d8da81ed1d08f440552d8a8b5f92101ad133f734b2cd72556682a73e9c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEUM72500484.
Ein neuer Freund für Bagger Ben - Teil 04
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69624ff19b97e49da38246ac96bf19a98cf847f2c8a9f115540ae62695be2d91. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/DEUM72500485.
Ein neuer Freund für Bagger Ben - Teil 05
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47bea732f131a32ba0d957f1a69b6f24135db3e74706686856a61a2140a3a009. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/DEUM72500486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fcc694d0f3f796d29c7bee9429964f951a1125b4e2c9ab7dff9a2dc3be49307. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEUM72501819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866c1dc4e5aa7a6d649389c7752e196c8f6fbebeece043ee57dc06f71e9c65e8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEUM72501820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf855de8d7a66a8ac72e765ed845e87ab694ff9d2c33ceb652973f38ad62d35c7. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/DEUM72501822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23568c101c1986d83aea654868cb5c4eacd8add9b7c668a4bb4548c4e49cffc. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEUM72501823.