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 0xf7636706ea3aed5764808ecb23cf2a33eab6c0ef346f7d182b53ab805a352a0d. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9aaff1b2-247e-45d7-8759-52cbb04aec83.json and https://artists.proofprofile.net/proofs/artist/9aaff1b2-247e-45d7-8759-52cbb04aec83.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 0x5f4f04b8c65ee9d491a33b0a1361f2914bb7965544dc62e6946a5687eb07f685. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/GXE5H2405001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16dc97075e2f8fa1a42f56187dfe05c437aadcbab9cede51d5ff5a17a0a65a6. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GXE5H2405003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408f39ba18b342d29373518dab2bcdf9833834ce901f6711c3b515dbd68712e0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GXE5H2405004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658805f22f7459cb02f1df06316bc8ca6b2a6407cea377ec7063771ab8edfa85. 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/GXE5H2405005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bad85c97c6d307160666b457410910498af8f6ad3f73c60d5adfaebf6d0b7a. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/GXE5H2405010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1683fe9e7149437bf439aa4cad3c194fcfb0890423e00b2ddec4fe0b4ad25d. 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/GXE5H2405011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d089ea4052232276dfc119653f5fa5c36e8e28de9fa32c07d5288208b749d7. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/GXH692500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f308d38fc3830794666a2bb24c1d9bfb4af64121a0dec80985911abeb3e16b. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/GXH692500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07701a50c590a7fa4b24933b3c52813b6562fe77c73592f6d8332c19327edac8. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:38:38Z), 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/GXH692500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aeb59f784e41e4b8f7415841cc2fb69ff7dfc6ebfc37a93f42fc953a33ae8dc. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:02:41Z), 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/GXH692500004.