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 0x67e79eb1ff01775963d7f5043cdd0551cf563717598c6ac6efe8eb8e4e9b3e24. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/50467fe1-56f4-4645-aee0-9553fd1bca52.json and https://artists.proofprofile.net/proofs/artist/50467fe1-56f4-4645-aee0-9553fd1bca52.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 0x1b55f76d6def2798cc8b3ccf15beba15695e37c198c2cf678ad1338b16ece427. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FXQ692400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975fed5c1466afe6e79ea3639f6093cfbb4e87df574b2344336930d30630e2b8. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/FXQ692500087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046b9ca85a232d77b0239c5ffc6a568edae7a4ff904cb47687bb54bd50965b7e. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CH6541804663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4815a6bb9a4e542b69102de511e555e1ed3455dd5650621556c9f35b21f48c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CH6541804670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1707cce87add6208277680ead90b8cc6a02be26ab553a927e19ab06d6b2de4. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/CH6541804673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaec9bfa34ddd8d59827d4b77a20cf08e2c62f8549dcd51f601fa6025928c439. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CH6541804719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5735493f28490ddc7c57d11683e0ddffd724945f15404c9b02577632b845f62. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/CH6541804725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c5da5560c1d70084e5790c3b6bef2f5e4c9f50998d589ac242f14dc16d0338. 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/CH6541804647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4bb6e4d21300bd2362573bfac25687aa9f19e1ad2d03c15e26ce4219d2820d. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/CH6541804648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf57c3d5ac67b601e16da2ed85c0af43dadbc9a3d1eab3250420cbcf2c8a152. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/CH6541804703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334a2d749d01263e938c824e84a0964d596a3d0b8875f701ad76c149e7615032. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CH6541804705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e830636be7fc0f3f39cd0e0e4a32f62989d1363ed97e5413621d6e86bb7a13. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CH6541804707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8020b33dfc5a97b17a5f565513247c06cdc8cbac0e21a7af2516c60ff1f8ee. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/CH6541804708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2018c15a4cf5ae03fec032ad328a4a4ba62ae2ef6f9e2716c4bc2f41a06b5c97. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/CH6541804709.
Interference - Mandidextrous & Matt Scratch Speedbass Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa305d604aaf197ce7c788b27aa0e19e6e6c9035077f3b2972e5bf038f1210110. 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/GBKQU2049913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0df4b5bae91e6b66b029a7510617cd2a4caa418871cd3db768965b1828873d. 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/GBKQU1795322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e3d468e9275f5a3b6c2aa81a8b14df8bda1c765930984bb08d429692a3caed. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/GBKQU1795324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e577b954aa478dc272037dd49c3caadc5ee97da67a67b747dff1a11d175448. 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/FXQ692400290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbca6f4381d9240a031894e956046558425021105f0dac2442ebbb088b08f8ad. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GB5KW2202265.