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 0xdee06a28d37fd377436c6a4533e208d40277ff0cf257f8275e72c933bb6c6f1e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3b0198c8-81d7-47a4-89c4-876247d5bcdb.json and https://artists.proofprofile.net/proofs/artist/3b0198c8-81d7-47a4-89c4-876247d5bcdb.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 0xf547b92400a63678d052f7638a517d8225b28b16277f4c9d302c36c860a9d657. 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/BRIMT0500240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ba22face3d8ff6a288e8d14a0aa2b025081937426f580510f4a099577532e7. 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/BRIMT0500244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1b1e65172d36e064839e572892870cd4e9cf34a1f74296306b884d60a5cda8. 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/BRIMT0500238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c58419aff4aa7b26ce4004de752885655877553869e87f6d0bc090286e6018. 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/BRIMT0500233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f368c5a3b5fd6d19fafc6a37df9949ebe2d7081c95ce7b2bdd360c639150ed. 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/BRIMT0500237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4769fec0c7c57a9f63164e9205edef29f6297948147c4e99b1349aa4ada996a. 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/BRIMT0500235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6ef63b69c99f6e162cb4429ff9038328d2124e02ffa4cd237c7a0d98a41746. 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/BRIMT0500243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0bd72380cee3801f6e0d405b0ad67337009a566f61b993a31b018e8045c6dd. 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/BRIMT0500232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488cebac4397fb4008c89ad29ed1a29b5a86532cc63cae368b829288e256a676. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRIMT0500242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2b9c63b3773c6720abd1656005e81954300256b27561495b8ac00fe29e3d77. 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/BRIMT0500239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5298769974f703cb906499a9bad34f2c7b986d892ddb4acf29a64d87f53cdf. 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/BRIMT0500234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250870f1cf5d64092d1e961dc45178a83dc72e04b396a1cc360d6366a2c06ae6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRIMT0500241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce5b8ff0c57553a9e48506c6340540381aea6c3f4f9722529d96872b3cd2dc1. 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/BRIMT0500236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce79b80e6e29392a0ceadd4ef4c7d1c0c15524f4b5bd1e9cd750a0589abf9d5d. 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/BRIMT0500228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c42a179cb1b67b0aafdb4ff3d00e4208f7f350d7d7e34f30873fd469ce4add. 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/QZTPX2383608.