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 0x6be3bf8b30307dba157cb46a065a415e2d40f81e965df53495e0efcbd136f83a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a6b205de-a9af-436d-bc93-c79496c2821f.json and https://artists.proofprofile.net/proofs/artist/a6b205de-a9af-436d-bc93-c79496c2821f.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 0x92ae62911f0666a6bf6df35efbd1ec1df639080e25355bb31c9483c9b46b359d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DESY21400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8063f2d578805c12efee1cc4418a87a1ef3203f79b27240b9ce67cbcee758e9e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DESY21400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34dc14dac5c8ea690319e1b7f06c980f4480bb3ca97446d26bdcce3ed4b0a4c2. 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/DESY21400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188cf0da98bba8fb7715867672e2b05599951fcbef4f94395d68b90e0558bfcf. 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/DESY21400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8e7e1e03d9a0b7f184bc2b60e4bfeedcecba5acb6f0db9bc19b970a6fe890a. 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/DESY21400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18cd6a2a628befed3afe23f3a730cd5f48e7782403707ef0e20c2edc50e0451. 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/DESY21400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618b2c70f287395accb54d7c49f3098ddb7ad1876277557946aed1e0dfc80a9f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAEZ2061011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382a53024be37668d3e5b97570292d31a705a6afdff0dbd8e2335b512ece8a6d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAFO2101264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945ac4a771c364ca1f8d3ba2f926000ebd9c389fcbd9b79c7955796b1df65c37. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRX762361308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3564519012c957fb3bb30ace0b0aed22501625e53cc0a4349cc2329ceb859f1. 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/DGA062490032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5320a4b97ac3bd07c1457bbe834e918b78b433073a6fd44f2168da3c787b54. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DGA092473421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7501e4c23d7a13ec13cd1585f9ee79fb579f1ccb11ece991606b97cf658716. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DGA0S2417494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b93cfb5b73bfc26fe1556cee22e51682278daacd8c9dae746a6bbf3a8bfcc3. 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/USRC11502882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b93cfb5b73bfc26fe1556cee22e51682278daacd8c9dae746a6bbf3a8bfcc3. 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/USRC11502882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae3fb7fe72473ebfe8be885278eaaf45ed22f1a26e3c84656a6da2906eb4fb1. 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/QM24S1836207.