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 0xafe3d981e8512a067db212117bc0c41c950871068150c4db1029543e5af87d09. 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/599b92f7-5fb9-4cc1-982f-d8af0f8d776d.json and https://artists.proofprofile.net/proofs/artist/599b92f7-5fb9-4cc1-982f-d8af0f8d776d.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 0xf33e9f1a9da09cff374d7b8bd8a87c39c091f0d51be4c43e4ff81436a43c91bd. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BEK010100066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa606501c68db6a17eace32cbe6d4b39987153e3f088f7f2272f8e1f33fb7f319. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BEK010100207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85c36c04295bb63ed43af2c7ab7197a75b882c981a670ec214feac8e45f3ae9. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/BEY600400187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a08ed1ad1de46c790a52007f1d4e1e00b347106403a5d5735bfd82a7d85d66. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BEY600400181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf12dcec518715c026697ef3e325de504c98544ed0594be6322997644fb060b4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BEY600400188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b4be86506819f2472f1933f0075b888bbd0a7b680ac02d6b6d71b1b4c77f3d. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/BEY600400189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e16287fbd496f20a59df6f66bfeb98b7eb119899ca5d8c4a37d0a4923a6ce4. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/BEY601000396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be2c3d9a6b1f572cc97063bd3659abe8bd8619118c3027bd19ffb0633cf4490. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/BEY601000399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79f717688808ba0dc8bd068df0e64966f6810fd54d3fb0067f1400592c0a0ef. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/BEY601000370.