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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45e80e0e29fd1327c6431a31a35e904da38eb3e0bc9ac186527ffecf20fb19c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be603342-a4e0-45d0-b910-d6c10e54f745.json and https://artists.proofprofile.net/proofs/artist/be603342-a4e0-45d0-b910-d6c10e54f745.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6351a560ac8e5dfe19c38694ff0eb5f04f32624624a5dddf77dee570d20d2a7. 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/QZFZ22455010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05dfe0daab41514e8ab09ba72a122117b6a7f2d6da2013a01c1e2e010df177b6. 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/QZMEN2389208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1ed7e9931aa6f0844d5dbcda7bf491517d2faf208fab7f4de39cfc233d77c4. 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/PHS112400245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5188e024cb55541a9949b40382a4ae338c6d59e6e3b2db22d00994a43ed120e1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWFJ2325831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75bb4570d05f49f7cff91aa0fa0362dd66ae279e49ac88d6bd571a9297fb106. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWFJ2325834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb835790a61815f709a67919c2712a946e4e5029d7255f7dc61872a5a2cbecb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWFJ2325837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9611b843a2b9143741494d0d329ae93589998ceda641470fdff47dcd7243da51. 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/QZWFJ2325838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa55cc7a18efe6fb03f31a69a942a4e4dfa0c6f35ad05bb06e259cec6c1c962f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWFJ2325840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfafd43af9f067a44cf68eeeb8c20f90eef3c55e3b4225968a6e8af60bc5f97a1. 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/QZWFJ2325843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d64387e1e6e54a3f0d61bdb5b1dcaee0d1fba6bfb15ed6d4f61094a9312b72. 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/QZWFJ2325844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83feb62b5b52de15cf01d0e3139eeaff71892c434f6cefce64a3adbb53c93c60. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWFJ2325845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf933c212a0cd6f5d7cf78772a107801338a96b8d8e983c3322427bd46b2df8ab. 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/QZWFJ2325847.