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 0x4ee36cd4cd55561484658596c80fa5124aceae9cebb94d7501741ca07857f6d2. Chain 2 (Bitcoin): anchored in block 953618 (2026-06-14T09:16:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1c92c02a-250b-4c75-be3f-534f65bf04a5.json and https://artists.proofprofile.net/proofs/artist/1c92c02a-250b-4c75-be3f-534f65bf04a5.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 0xc6ed2ab0df79962b96abbd23f697c1c4385cf768d12d783dcdb7d95fbce19231. 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/DEN120305629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a894e283bdeb901d628681f9f07de2e15bb93c320fdbd2e9e22bf81f0695b53. 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/DEN120305630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07974fe8222e8dbd7f6389eb1cee92bf7b8b422f0703f0434749b8550b416764. 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/DEN120305631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453bb96410fb95d3d4dc51d1820619d17b80c5e10103df8de31191278d25e51b. 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/DEN120305632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ae1a2473c2b223e81f84e361393f4f325898f44ab42d9bf538b234f41779ca. 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/DEN120305633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892481cd3a1c570dee7daf1b549e1510518b0d20bba64ea915247b6ec05bbbb5. 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/DEN120305635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe991ca572840c4cd6cac453d5c2f39fe937afbf66a7f8671df9bed627f18b3d5. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/DEN120305636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a82edbf38c9741755944343fbe8345e944bedd8fde90caabd75653c666e744. 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/DEN120305637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2dffdd2faca0841161ff25b6c07820cba3ee3cd5288591cc9a94b00ac3dc85c. 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/DEN120305639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c97cf26c0a238b6cb4cde57b50d8ffda17c5ca4ae839e2459c5f935b255af48. Chain 2 (Bitcoin): anchored in block 960101 (2026-07-29T11:46:30Z), 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/DEN120305638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93595f0b422beab5a3c9068145ee75664c7f56e145492d543774a67770ea3d5f. 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/DEN120305640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4b5d004df77a0bcaa553a45f439066be08db5887aaac95d413e3085c918efc. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEN120305642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260264e576cbe4993ed350d60df8bfa3e0f410a25d5f91258eed1da197c0357a. 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/DEN120305643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce5b19b1e1ee011d11210c71a0f84e34893bccf403eb570978ec00f87105e17. 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/DEN120305641.
Selfmade Records präsentiert: Schwarzes Gold
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6a3388356ab77ebed421a25c41ad1301c4f8342c93cee490381109281a3332. 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/DEQ020502015.
Wir bewahren ES (feat. Creutzfeld & Jakob)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f7d2db8bdbc2e18eb29dea413b62b6a66cf4e622e8be7b5835fb90df018ca4. 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/DEC680000684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da9e12b30bef7e436fd9269e7a3d05ddf2300f9a8337f8a7420cb8e40fc6af7. 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/DEQ022281261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c3f9e1bcaaa1a2d5f73b954bc9e763eb4830bf9fab59c52bc3afd951ac4597. 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/DEQ021905673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc873729ced76845cdb25fc8e7e53b71dc186c11390729297679066f5ca9f4665. 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/DEGC61000599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cdac1fa401cc68e411953195b304ac73af09564df8365a0cc30824e64775b7. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEC680200648.