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 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 0x599446517b5ec264531defb30cd80f89bf01a2484e8e2802614eb1ec0c811534. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5c15306a-8daa-4b51-99aa-39811a1c6f66.json and https://artists.proofprofile.net/proofs/artist/5c15306a-8daa-4b51-99aa-39811a1c6f66.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 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 0xcbef237912b0c6a000682a0aec128ee1bc7d4e6f040e4ce24fcba307bad7985e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BGA472323295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91dac3c750882b5db446a296c9973bc84449ef8c3db2c317cfe999ad6be31aa2. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/BGA472323296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8681743ecf21d45825067bb9494ed5e552d4ca14f9959db4c690e37ce48b4e62. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/BGA472323298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d7fe6522125e6584b0e0feee9aa39401e448e6274692376e553372041ade01. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/BGA472323300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfce12ae8319ca69b65b793c4d5c20581cdb61588dd3dcc007affe6c8a8382c5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BGA472323301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2177e464e1e00179466fc70c34da1dd35571970921b284f9c2b5fb1e8a7bd2e9. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/BGA472323303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1975b63f5670331c977a00373ea6e23df1e93aa26016c2212361f9d749f6dcf9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BGA472323304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f8a287b320f2bf77099d055b521acf6a4a3c3c028de2f3e625b09d321f27a7. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/BGA472323305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714b33b826c769abeaf78e360d5d3f08eb0cece1de96c5d170113e878397062a. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/BGA472409730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72d094581f6586dfded01949a59cbd41871ba1593862cddf51e57f9899af507. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/BGA472409732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514bcd5669deb4173508b36ac55ad12ca45afa9b81ef2fe88e2fa36fced20b31. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/BGA472409739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cff813507736648436b2193c5725eb6263c9c2656c14233c3fad6e5544169e5. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/BGA472409741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a314de06548c33a164f637d3a4b020269ac15b7c027d8980f1c630d41760598. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BGA472409742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0100e097f242e9a9bc0d925eb6e68ac95a76f2d586870eb55de6ca2ed1fe76f7. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/BGA472409743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded9c51aa574372f35029fb9ed9e92bad148a745c8f24ae765b2f71954739c07. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BGA472432997.