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 0x41818110c3462afb58363f6665e6151a53e84f4b427e2029ba68eb308eebf52d. 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/3af6bd25-5285-4f32-9d66-673727601de8.json and https://artists.proofprofile.net/proofs/artist/3af6bd25-5285-4f32-9d66-673727601de8.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 0x99abbb47acd47ba5d901aac04570341c70b07932a407e2c3a71b8be9f1c0d582. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/GX5MY2214939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf206ab3f52bcf47ba8503c40a2edbcfb1e843b8ba9ee88a5e809dfb6461358b. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/GX8KD2356834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb8f428f953762162aec164b5158d83834e923af1ae578c888707c95bbf4ab8. 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/CA5KR2351506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482106811e37af974684c5492daa802bc82bbcf9f1e2bd6d888b69db70ad64a4. 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/GB2LD2310192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7adf5fdbb378422f75ebc93e98fe3b4d037ff2e1009cc13ab0c34ce8e33bdab5. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/CA5KR2385664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4da21c594a34df92437217e45e752cade879bf188b90d9f3f3e3ae5378f33f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNWY2404370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358b9f289d4014c1eacc4ff2c49e8eb0befb417165f84ecad68ab0f5147b7cc2. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZNWZ2414969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd909dfadcf6cd2f071b1dc26bbd424ee1a063e1a336b6aabb2ff617c83608f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFN2414276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9b7aa5c35c756f17977573083b818f5fbd5e50c80985c007db6d7540951f1f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZZ7L2409776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d49a1af2bbdfb313480348bba28a4ce4a2ca25b87e48b204b03c9db6e2ccc3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ7Q2466388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fb79f1769e4ead5683b48f6656b128bbc216adb18c67ae60606dd50fbd350b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ7Q2429440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bef135bd5a2bbf016544c2a0699c540723e6d7e3adb8f83fcde555028720bee. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZES92559046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28f5ca9ce88399e3808f3465f709e1403da868f01009664f044aeb499ebe4d1. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZES92559047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511d285bff6823f2a24251b294706d1e89e50db0910c204208e0d311a91db66d. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZES92559048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d227b74775834c71c44399dc61f7852dfc534c5384ad469b8319be70ebe54af. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZNWS2577443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a777d520b565894e7640df67cedabeaa64fb6fd98e4334402245c686b9fc15. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWS2577444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1186c7d6c9b2b1bb5e2bdd1923bd4d7d2d2188669fee9f8d04429db7aac8946a. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/QZNWS2577445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00577ea65e2ac69fd82fd5f39d7ca48998f607646f39f1cd8e6e131efa946db2. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZNWS2577446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da33bf79bf4d9b38a1589f50dee4243940fcc8056c3a2e3cbbda6dd1103b09a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNWS2577447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62f965d86756f8dd5cac8c46900dc483f64162e1acf8e694253d6f96606c312. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZNWS2577448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16441b622824ddac4db6baa8306adae63d2186c095d4ac64bf445e62202708d5. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZNWS2577449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3801295d579294c8a0f3994a611ab7a564458922bb17125bb4b9329c5888725c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNWS2577451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a0da1dea520ed0cc2ba64ef8fa5db7276ed8e312ffc6eb7107fb648d52f77f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWS2577452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c33a2355940318e79d01f94269b0aac0911689f1af7ec407cc9e75eeb719e6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GB2LD2210174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9324cc3c03f273556fe68c4fc407a5846baf782a89089818ec4b40a713d2b5b. 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/QM5LC2200154.