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 0x2446b9e8543e26bb31e4c75eb845f0ef747f4f020b8f7532d59fb9f2eeaf13e0. 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/47b4a9f9-c6db-4fc0-94dd-9ab4f4e58651.json and https://artists.proofprofile.net/proofs/artist/47b4a9f9-c6db-4fc0-94dd-9ab4f4e58651.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 0x64a4e61a88a7e6331b8a3a106e1beb3ce134422911665e894d30f28d1debc41f. 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/DECE72301910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0941cc5a9256683bccf0f87565a489f72fcc5507f2a7af96ddb1c1d65b0bbd. 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/DECE72302452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0514945e233f3a0553ec6fce9ef1e8f5dd5be5c5fe7626e551b3bdb2ba505b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DECE72401149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f7a5c3b29b20062e4a44e1131682c2e92295eb2d40f72a41fba359951cd613. 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/DECE72401845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1bf935be1b3304272547c0fa1ee15afecce2ebbd49aa6f5ff4bc28fa1f1112. 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/DECE72402910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3947edd4b79044b8f077d6265c9f9916e3e0444e76fd41e3720088bab1a0d674. 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/DECE72402335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f7a5c3b29b20062e4a44e1131682c2e92295eb2d40f72a41fba359951cd613. 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/DECE72401845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0514945e233f3a0553ec6fce9ef1e8f5dd5be5c5fe7626e551b3bdb2ba505b. 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/DECE72401149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1bf935be1b3304272547c0fa1ee15afecce2ebbd49aa6f5ff4bc28fa1f1112. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DECE72402910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3947edd4b79044b8f077d6265c9f9916e3e0444e76fd41e3720088bab1a0d674. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DECE72402335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f7a5c3b29b20062e4a44e1131682c2e92295eb2d40f72a41fba359951cd613. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DECE72401845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0514945e233f3a0553ec6fce9ef1e8f5dd5be5c5fe7626e551b3bdb2ba505b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DECE72401149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c3c29c281c0d92eba499e1dd4f7995991952175bb9c8bef0ba4dbcd840aca2. 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/DECE72400987.