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 0xd7a218389df8d553fa03331a627fe48ca1d3f98628a5bbf4ba717b1fad90448e. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9486ed41-a904-464b-9cf0-c9daabb485dd.json and https://artists.proofprofile.net/proofs/artist/9486ed41-a904-464b-9cf0-c9daabb485dd.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 0x62bd2741acdc0885e3499f0dda4b27240955e6e73da09668f2bac7760a0488c8. 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/GXH2J2522263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc5ee1f5ec3c5d6e3c5357ea9962ac838762a964974aebceccc9e7babbbf4ca. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:08:48Z), 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/GXH2J2522248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911f617b2d89c3fe77bc58b2ebca2b0aa79cc7d0bff572dec256d3d807218277. 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/GXH2J2524057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37aa7dd9ea1d467edcc71af096f73743a273abf35263cd34772cb23a4dc133c. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GXH2J2522244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f52443f64b498cf04e595035519ea5feb0fc25c36f2c9dda75f7fd03febe7bf. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T09:11:46Z), 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/GXH2J2522236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e518ca37e40a3bafd796728ebde517007d66b0d24aa7d6c88ba609ee0cbb47. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/GXH2J2522254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc159514e01229634d7f1b7c2ee2899a8e44dffc05f04ed29896969452a65ed1b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GXH2J2522252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4976d1c7ea57255cc459a88d9544c16dbec4fb6fe1b140f84cd520159069c29. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:57:48Z), 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/GXH2J2522242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac1f97fd164ce7d53063e03ceef4d0a81fdccb2408876be679a9a4c252cd936. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T21:01:12Z), 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/GXH2J2522255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47411a55349bd614f444f0673af5f0ec6b87b9407ca33ed7d944fe89d354352c. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:28:39Z), 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/GXH2J2522256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c20f27c66e7ca482acc1f006e0cfb9b1fb826b5e40c6ff0c1798ccb11f03c3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GXH2J2522253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a744f03f60ac0ee0078f728d3c557a87155fc8a91ca5ef1d1c126139bac0d1a. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:45:33Z), 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/GXH2J2522249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f86c0930e8f0e0f6b5966cc45aca2cf0642becd5392dc8e02ae55168627636. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GXH2J2522250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074357ac48d04d1283c88e365639ebf264de06151d9eee9db00cffee9f379fc7. 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/GXH2J2522240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd139d3d91faf2ba9ae5913d320dfb05e350c4a8fb4dd60759f668e6e9cc36cbc. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GXH2J2522235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aaf33ef91a0c22e952f3ea17a71b84cb9c208f4043c7283a646d0ff7e4fde43. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GXHAF2556840.