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 0xa88576b3eb463fd35918667f7f98c27abae51cd4ddcc19aa9b99e80d8d442947. 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/6d0d066f-6a1b-44db-88bb-248b8dd026bc.json and https://artists.proofprofile.net/proofs/artist/6d0d066f-6a1b-44db-88bb-248b8dd026bc.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 0x04908261a52a5a5995be31526e2ba202a3d4def95faf0f3b283b131abc4e0df2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHZ32271525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2703e969a899219614e261b511e56bc45824d1d46bb4ad6501be1cd957f3a6f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHZ32271526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a35a10f126368430531d4a114958baa991dd6f8a852d15e507d229ab6c7da0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHZ32271527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46416f2b87b258a405656c5625446ee00efeda7ac6838a1808575a739ebc1134. 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/QZHZ32271528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d50001cda4696c542dc7c9d29368e5891a7b3d9d6f0cb8c3272e8ed6e18a8b. 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/QZHZ32271529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7816e56c3cc59d50cdbf3f67c1c1ecc406b224fe0f0d35912344bed7c47526d3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHZ32271530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15c8cfbb4f43070d063329227c5f5aeda5848ebd77093db36813041e05554ef. 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/QZHZ32271531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47aa5687b3cd4d84d28308b5095e384235577344490a70ef5c12e10441cec67. 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/QZTRX2437379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e245c966cdeb95bc6e0e605c5afa0b8131862b1ac68e807897fed67e019ee9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTRX2409344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5506d28cb6a5f2225c8cb336a8cfe4f4419e69ea0f6f3dc9360a131f8bd78c13. 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/QZMZ92460984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf200b3138b391a7000b548d47e01d17598967ee1a5d4e5461ca6785148a964c8. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZGLS2495098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4692a3a7a4f3bfe851365401f4fdce18f31563e3d34bc34b9ee67195fb279c04. 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/QZGLS2462811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c08de538e279ab33e616c0e47713ed8da9826efc304be9a22a7900040de742. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZGLS2404302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f71884ef86198808404b440590c3a6e8008786914ef1d01e76c8a7d16c62395. 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/QZGLM2439452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6e2791a49b4c6fe67416a4b62f8aae7d51ac77ced3aafae4376128518272a3. 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/QZ5AB2478914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5ed496463fb8e0374aa39cda19bce820e26dcbc9a9dd324ee0d1500305ee56. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZ5AB2447550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ffc1bc7faf7766007b8a1df0407cdeaeabd7513b8e5adeda4cd7108357cd31. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZ5AB2418473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f8cf760ecc4a46cdc8b5d7751e7da6a42736e0d84c9bb3ac10219818f92abc. 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/US7VG2486131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e03fc007aa368faec7b0121a994187ec3b45de754c29b5a5b5d878a0f49f53. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US7VG2456990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f07b155c11230321d96d7d3e62cd43170ff4e094915b02dcf730ebb6793dd2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZW9K2346619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e00f4a2180bdd24fc98a4bac4fd0d9b246f33aa3175e6c24ba61c93bab2ca7. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZW9K2341417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3737c0e2e2da80fb2ca4f41a810c8f52b8965d9e943aa6a1d5a7f036def5f528. 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/QZTVM2362257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f9dc90f482aeb1042d643652657c4cc2128daf6a27e69abc681c9f7e4d9150. 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/QZTPX2378248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3835079503654e8e280f58c9dbd525b813a423134fd048616e1487bf95e58a0. 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/QZNJZ2326032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652cb8fc90ce8c0c4ca2c709ad6c2647fea97d16fe77d38ab5ab96e151895369. 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/BKTOK2300107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d9dbb67daef4b491cb206e9b78dce97b63916259741c06254c2e4b670934b0. 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/BKTOK2300092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38810fb1e514d0fdef738794cfc5e90f98ac60bd8d9ffc2cbbc073a566a874b. 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/BKTOK2300078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb90fa996cdbcf26c52dd0cc0db589c302fbb6cce091d4a9ba64856964a92f6. 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/BKTOK2300060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb7b27eac502dcc1946e2167634bd0efa7bcd5dea9a33fa8f236051ce12f61d. 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/BKTOK2300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b485aee848eec7282e7f568bb8c1d3766e31f5578e222a9f43d8e29d934793. 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/BKTOK2300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95edc6ff0e2fa1cb253b1b133e9b9c1c4ffc226df27bc553eb757ea56895fb0e. 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/BKTOK2300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637eb6d033d1e0dea77ffda3853223344cb6da91a8c2acecced98f44e8cbd332. 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/BKTOK2300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37083304aaf0d19efe16abb096dc82e7f6ea87466cdbb2505392e9d0410d091b. 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/BKTOK2300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6045b4a3ff573ed19de4e81313c6bb41489b35b4bc19e1a00959da19717dda4. 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/QZGLM2394423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70abf1884b009684fa4e5767fcc4c4498151894ec553256eb7e756bf9261c113. 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/QZ5AB2324741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9eccd4d4c748bc948a6116ec7c9c259b4df4e71bd4fbd598ba4786aad1cab46. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US7VG2370581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e7286c0d38c5b1dcaf2544f0231430fabe021024a3c16b808fac21a9779461. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZW9N2265313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b18ff15b2f982918af15d74ab71fa632b33923267a1b79609f05cbf6408663. 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/QZYHM2408251.