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 0x7cf9071c8de8cc3edc2d10ae1162accc5f436e392d1637cfbccbadfe8c6c1d53. 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/114c5004-3f1d-4f54-94ff-ac86ddf0166a.json and https://artists.proofprofile.net/proofs/artist/114c5004-3f1d-4f54-94ff-ac86ddf0166a.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 0x7c1fa21f06bf7beb949a69305d051c1b42dea47b4560b348bae4e6d9a41d6fea. 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/IDA040665102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfe7c9012598872d336195fb4f80c39677db5eee4c0194d56c63c3b5b005293. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/IDA040665106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b1c2289fdfe22a1ab3075d1e0d596420750674399c7c073f96a56db3db303c. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:15:38Z), 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/IDA040665108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bc77b2286be4f7612b693bac177f43519bf2aa7f027997d6323be6f4f340d3. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:46:44Z), 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/IDA040665109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00dc381d32296563a1e60dcf033581a7544cc82a4110fd02067cf7402728df19. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/TCACR1601194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a72a5247672fe7ebc7f6f111583573b7753f89d047acd250819b3e3d101caa. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCACR1601205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060ecab633f8c60cb097ceb3c0d6652b222c1a56c4daa5f23de76c896a6f85af. 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/TCACR1601207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12cd52c20f1ead3d559c60782e33160345428637eaab10da022c96911fe35315. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCACR1601213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89c71b43a7a0201f543cad68af116388bbcbfefc5a11bc323249cc6d828e09a. 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/TCACR1601214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef6b2b6c6d1b498890ef717f203d453e453030153e826ecd336c804b47d844f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAGB2209825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785679bc37c5543456fa456a0c9532638c1911185bd4175b07d2e15b9ac493d1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAGB2209984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94672c157eabd55d2e21fd9c018c82d0382982c69087d00d7563a9cfae47b19f. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:03:21Z), 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/TCAGB2210023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9bba1f70e38feb44ccb1c1fddd99d0e49060996887afe8c0f2b38c64eaf9dfd. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAGB2210012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f90dfd2771e74b5287e6b6fafcd0849dd7c0250dc12b9291122cd43dc15fb75. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAGB2209872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa312632d17db6f19b485f9ea1ce67c2b4217ed47607d161ec680617182b38c2c. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:27:37Z), 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/TCAGB2209948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cef0eac08acf0dd07db74fde222339c2f0535b10250c2a3fcbd7b5995c8b976. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/TCAJQ2516230.