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 0x7c1c5c55f6d62e13eac6d16495fdcb837604aa0c15e1135e82c297d8fbc926fd. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3240f435-4510-4254-9655-8a9306ee349b.json and https://artists.proofprofile.net/proofs/artist/3240f435-4510-4254-9655-8a9306ee349b.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 0x3548e9f774d8a0217074e9630744a2be7aae0c60e484ef8e37ddf0e70684a495. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZK6K2242321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb9de37503984c49a3bda80580a50ee6badbadde7957c016f807ad56ea58e8c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6K2242333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a15c58310f6e3bab83f3998aeecd0f1589e101cb2efcff95010b3050a0b5ba. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZK6K2242335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65092f6705a74790f5b339bd42e298ca0ff04ce0afffb607a3cc50b3ada8354. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZK6K2290680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3baa5cfd834c173b51d44ca02c8209b05d99bcd30cdf480cb595606d70bc2da0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6K2290682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e39dc79a9eae4218597f4961b3ce7ed91c9df3d92bcbe297e0ed7b0940be4f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZK6K2290683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8149ad3af73b8b4b882b72d5546e3cae708477e68844f2890c05c3569aa49b33. 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/QZK6K2290685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6de85552be125918491dada209225f8712a7b1c72ede713919cdf62b527389e. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QZK6K2290686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797a69b662e6d276f799028a8ef88c0f494a29ab7a13ec84055093b2d3c954c8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMEP2090432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2d58d18f76f516d52948bfa8c42e6b4eb5618a499949f60b889cf8e2590dfc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNWU2297632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc8cfcc5f44795182384532844a8b125d7cf3adf2fa269df956579c7d1ac0d0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZDA62149252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7883dbf8cdbf18c1cf98e6986724e676286bcb78ca4b9d207409b47a0d7262c6. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZK6H2006757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151a02944abcffc4cd7292dd992cb95dcf1ae2c05d6a47dd0d1d109bbd4fda34. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHNB1954978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaccae6ba725ae6f8bbe9d4c0f312e461c0375c009dc46360f8929230a257653c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHNB1954986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2344488e4cca80ec96db45e601531a123f66cbb38ba0d96044c6e05c4b5ac68. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTAY2325479.