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 0x07ed495f462fda12be88c74c87675342aa2b3c074845d16819255890710f0c95. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ae47f21-acc0-488d-8564-98ec9a9b2c33.json and https://artists.proofprofile.net/proofs/artist/3ae47f21-acc0-488d-8564-98ec9a9b2c33.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 0xb8dff66439b18307e77e3deb4eed4db16a9775793c814bcb471b628201dcbae5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRCQE2200082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1319c267ac1350e92abb4fcec8aca50c6d30540056fede66d177ca3c3d5ca82c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRCQE2200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0beddd0ca1e3e3c0e95663a9f26ee736ff06f02e268056deb5d83671498bf0bc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRCQE2200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eeacb97333b6054e0068504c415697679fd67e473d67bd094dee69fa305864c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRCQE2200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02776c6155267bf79e06094b742bfb5edcf5e3392b3218174f8b357d97c64f6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRCQE2200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88106097ce727d5db48b65dd64eff277aaa04e50507a6a531830811919b86c7b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRCQE2200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb52cf340d4184327bb5084f98526a04c9ce296c3fd9f4cd829951b05b31823. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/BRCQE2200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d74b8bb726cca3342eb604fc24cc8c577e866c435c67eeb75e59b36c585481f. 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/BRCQE2200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a724a63c2d773db4af3a8e60b9d168f3b5576d109c97f98b041849d6c65208. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/BRCQE2200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1953fb0fbebfd09c999df278bf2812550a9b9009acda5386d228d3c57eace21f. 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/BRCQE2200038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ed9d5165ebb8e9d747c7ea11009980caf0bdcb856141d15c7d8e8395c222f1. 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/BRCQE2200080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890f979b69ef74cf9cd80636ac9c63898435b12492a73da32e36b2679f25d9c9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRCQE2100038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5dbd64f61f9cb92b97ba74ac1a2d0b5e6249ee4935c701afb2141f99e1ddfe. 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/BRCQE2200039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2942803f554aab3c448805f20cab98f5ec378f5e9d397f4261ecc4e3868afc93. 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/BRCQE2200094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc974ff8e4f450c61d822f262b1f681fcd138482e318edc785b54de3ea4516a7a. 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/BRCQE2200086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f7cfbf53eb72090f46cde0e6f007c07fd27607657025a3c5ec584eb191a5ef. 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/BXEOP2500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb229b1e412521270ff533ce69a22b92a903395fed7c922523b174c1862d00066. 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/QZNJV2577759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b51a72177b1077147e717d975d962fd816694aac9fa8196c6f54b83f9368360. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BCN1H2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fe2d3b331292dca21ad990f835c2b330cc6e688c41ae7c48c767033ae6a192. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZN882516783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3888de1d2f188973df83ffda8e0452417047f1a7ca110e54aa530001d2bc6b25. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BXEOP2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67cd4649b858effe66862924415162495a4baa280df4f44eef154ebc4bf253ba. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BXEOP2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdafe2fb5e31ca2438792729ee24f4939a217a562d10eb9c386ffaf223add4c12. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/BXEOP2400143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9941f4d08213d32d93a7face3b351526ee3fd90c93ea272fcf47a41593d3a622. 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/BXEOP2400141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a5f783a939002bcd44db31cd6fa902aecc36c85934f7b2ccba38ac3a149796. 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/BXEOP2400149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fcc716bd4f818d7d612bf862d6c0b7ed64472a9d261b418339340854d3a7c1. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/BXEOP2400146.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfe762f9d8c61c651c90547353696d6770f553ad97103429a1e71021c59060a. 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/BXEOP2500017.