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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 0xcedfe1cb8067e08a406ad98d6505197e9a2179edef30f9238e781b932f504eb6. 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/8d12764b-ae6d-4583-a0d8-e2513e6f2b47.json and https://artists.proofprofile.net/proofs/artist/8d12764b-ae6d-4583-a0d8-e2513e6f2b47.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 0xce49883c0cbfec02e8d5ce90d6411dedfa3d8911613dfea0a04a57f1d7d16db1. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/QZS7J2214105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50463b5246d2fb111e501499b7854e6586b56ed3bf978ef59d17d19b9d904795. 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/QZRP52240544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99b2ba76c62b8b642126d1c7565d6fdd46cb8b54a84e03f6fdb707a114438ac. 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/QZQAY2362121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3901a4f9d0ff891aead6083b5d45d88985bb3519531887a3fbf1be8fb4f62b6. 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/QZSYP2392173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a613d3755444a45c5826c3d13aefbdabde3bdf35244059cba2243f42b4712a0. 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/QZQAY2385929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f411054c7d63c7aa3b2d2bb7bdb23946da6ac09c7c81064732c6a7df0b61e5. 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/QZSYP2383850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa077bc5d221610faded634251f7a1200756f1416e91f3dc8e4760a27acb2de. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZS7J2365080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe4292bc73509fbd674e906005d5525164e96738985218065a355477b97da85. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/USA2P2350734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe4292bc73509fbd674e906005d5525164e96738985218065a355477b97da85. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USA2P2350734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f30b71d647bf18b1bac11013eef1e00806d3201d7067634868876155b04d848. 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/USA2P2358651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba69e9187b3bf87a04677ebdceac861bffc92047380c0900938f32a1c0d3789. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/USA2P2358652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc363e0d57337cab720aad1f4ab32dd6a5113ff724c189577bffbb706b246b81e. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/USA2P2358653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617ec589f5e23256f84897e97e4175a0e0b6c73c8f587467b2945d2b767e83da. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/USA2P2417622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d34c6d85e78004e2b2784fe63da6de53f0d91717ab8967a03718b657784a67. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USA2P2420388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba203578e4f78358dc680369c296a5bc01eb293ae7a1d92503f0b03c8dd6e66. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/USA2P2442100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba203578e4f78358dc680369c296a5bc01eb293ae7a1d92503f0b03c8dd6e66. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USA2P2442100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc184ee9c05f364cd2a74903d38fd2a6b7eb33da362ce63503825e7731fc6bd. 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/USA2P2442116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f6412b5847cfab1f3d83e340298ffdb412374b015842cf00c25dd18f504e69. 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/USA2P2445995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee3784dc93b79ffe750fed4f1e0f1b458f242d8f7aa482f39d29b518bdd3c35. 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/USA2P2442120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d34c6d85e78004e2b2784fe63da6de53f0d91717ab8967a03718b657784a67. 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/USA2P2420388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53bac9646722e80e3684a1c2a2e278d558fd781f4fb95741c0cef746aed228d1. 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/USLD91772073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791303ea94ddd0567c9b1d928aac09e1435d36131a1632480da426007ea5a8c8. 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/CA5KR2419428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec67634845abd7e637dd8cabddce20e742a276be3a67823f820d7009118ab15. 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/QZWFK2373626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee280c67e37306c72ecd77ef78cf1e6656db42e64badb213ee6834d5657b9ff. 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/QZQAY2356810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb0db5127b6eb43fe7d51aa2601fcfecc59ca7b7b7b827cae7e1fdf339cfa26. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZTAT2463813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb0db5127b6eb43fe7d51aa2601fcfecc59ca7b7b7b827cae7e1fdf339cfa26. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZTAT2463813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a8e8e2b937e40c603629d61952b97a6385ca02aa358134886fcd95def6aed6. 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/QM4TW2512398.