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 0x0b80b9bf8ec352edb6b37a53320d2d7d9e5f95375c82772c892f517b3d4307bf. 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/4e0433bb-d3eb-46b7-986e-6e0aafdebb4f.json and https://artists.proofprofile.net/proofs/artist/4e0433bb-d3eb-46b7-986e-6e0aafdebb4f.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 0xbb1b76bd56dce14d3796bf03e91029393a03f21bc1ff225c4f7cfa1332091544. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F82507754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5939d68256e913ac3bd6e39371b559ac973cc1141f75b9db24b3a9dfc3cbcc60. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QT3F82507752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ebc457ea7f09d1596d5cc64caf8a09850c5a14186e9c0706127be2a2ef91d0. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT3F82504172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf834d383c708b4909ed68a5d7429c3b746e933aa8b02b3345ecc7f7c0a09c1e. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F82546211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f68ef8cf365fe709d9659df6d781f5ba9df06b7e1265db5aad8a1799a5302e9. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F82548557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21da48c926562beb091c062919aeaaccb0f99d60ca5885a1d0314c506f90c9c7. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F82548555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9e117ede396039b7debe2f6148aa0726225317fc85ff9b84842ab0947d397a. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F82593417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb57dbe8ebf9079dac4d58c3a8e381a40064456434ad29755ba274b8fbb07d0. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F82593419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9006b4e297851942b01c3946c65725e09f3cbc52edf44d0b9241053a8e4763. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F82591720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcca6ffbbb28e81cf0507c58f7a6c399a55910c8598311b475f4755fa0376f5c. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F92546310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78004359629696a4b9ae2f875056f7d52ef47ef26dc1b9894d2f36f8b87619af. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT3F92544846.