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 0x38b7194bb57a277f620d5b924da3a9319ec08f1303d3ee6f749684d289930df2. 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/f93301c9-e1bd-4924-a7a5-9c2c398b239c.json and https://artists.proofprofile.net/proofs/artist/f93301c9-e1bd-4924-a7a5-9c2c398b239c.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 0x0a5c8348e8c762542a72c2b53dc06236270d63ec2c157b415ffb3a319c05640b. 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/NOQGM2401010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ac9b277a43f02c95f20ec14252ddc71248d827dd647a0655829704e9626040. 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/NOQGM2301040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8957b9ad17f16bfd529dcf64d8501d0dd1613fcb1edf7068834499b1bcef8f. 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/NOQGM2301030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeae382a73d8b9b352cfc142e588977025f05bad725fb1b37e3ae39afede9a7c. 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/NOQGM2301020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c6a853acefdf08c7b5a544c44e6d254a484f354ba6d406febe3378e2c1b8fe. 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/NOQGM2301010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2907ffbc11ec2d3dc4f36f5fa93b50dea358699b6becc7e18d92750fcf20cc. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/NOQGM2201040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249841ad7b792eeddd129e47d8caf06a740ca4c34969bef83331b4d52bec9b3e. 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/NOQGM2201030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75b4959b651abae249c613913ab27afb3dc77474eaaf9df50b2264b1fe32a9b. 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/NOQGM2201020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1059452cea79b739f149281b29e7d2dcba3242763fcae88225824df97e3f8e. 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/NOQGM2201010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7883c78b3e8ccc8d812ba6e40553a2356405769b84516222d290a79f15b9cf. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/NOQGM2101030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9bae195d45a8185e2b53238f33897f54de0813e6d75e37a6406a3973d02eace. 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/NOQGM2101020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388437abee940af2695d77d0bba236c90c2b27e28524499a4850d08274ac637d. 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/NOQGM2101010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72c235b2e992030928cbbc940b83978f49853bb5c6544d368c6f6d4bdf52280. 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/NOQGM2001040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd170ddfd00c1af12cb8cbf6b1bcb4af60e680a43d35a88e601dc03ebe162dca5. 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/NOQGM2001030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3fbda7c94580a414d6d219a97e05809dc289f3c17a80d5f089fff4cfddafe2. 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/NOQGM2001020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b37808aed68c40c4747ff1753271712f109f19494683966cb43643e3d653a9. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/NOQGM2001010.