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 0x5229c8bacc1f34de34edbb4eafb758a5126b97558fe30d1edc60da3ae1d09b9c. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cca724e9-d44c-486d-9956-4ea5b018b710.json and https://artists.proofprofile.net/proofs/artist/cca724e9-d44c-486d-9956-4ea5b018b710.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 0x33e1f86a55434e980f494df71a2c8e1c437545995e66f9e3fd5365296dbe442d. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:58:10Z), 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/USQY51011151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9348767aecc22e17c8a46e46db33f64d295905f471b2854a92b2b40072ae128. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:28:44Z), 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/USQY51011154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf620eb64db5c4a681f3d15eec33464bfc7918d2b133bd2950be1454de40bb752. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/USQY51178477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016c1ab633bb84d7dcb728535936d485f9d94264d0dbb7c638e118b69cb7ceaf. 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/DEW271305235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd22d98938ca5418ecb791e1ee34cc4f26778b564bc37d13a675a37d2f6be540. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:40:29Z), 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/QZ8251901154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe361d3d51c15565645c97174473baac692b10dc46b6e43499f815cfcb319067c. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/DEW272500183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc3902486edc1ff3bed442e69a4118b5b47b05867c266791b99fe29f88322d5. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:23:03Z), 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/DEW272500172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a2e63b7d00eb7846af3cf83e1cdd50afd6447009da914a32ab432ee8170bb0. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:37:21Z), 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/DEW272500173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221da3f28d64dfc8ef8d33749bedb7218f59ea895d6555408303be1d0e4eb1e2. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:43:43Z), 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/DEW272500174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc224af64022b7e20fc2001aa124bbd70f5351e8231d163804bf20886015b434. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/DEW272500176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458b0bf9c2bd2c98e0c655502cb62a7155df5388bfc918b2ec3108bbf03d6582. 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/DEW272500610.