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 0xd01cdff1303e56eed946e51df15f1e05609898ed83870b7606ba98d36c3f2e50. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1dc520dd-beed-4268-a43d-80673059a290.json and https://artists.proofprofile.net/proofs/artist/1dc520dd-beed-4268-a43d-80673059a290.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 0x4e8719dcf9da2bcf72fe398a67bff5611d9108ca18925dda3169233abe8b8556. 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/NLG270500060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c3b9ca40da88c0bd7cefb586f35230133d743ce89a52a85c74ee17dcc9a847. 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/QZHN92294000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0432d244cf872a3805e2f8871738a0e222cf2ec6101a9218ad8469fe93b6a3. 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/QZHN92294001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee1bfa603998141cc426d2d10e809b2f6d32f7bbfef635ec5de031be544259d. 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/QZHN92294002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f46116d4178e4e13a43b66d1fc0bf88e18271b7f4d5eea49b30e054d557659. 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/QZK6J2238748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790f844ee63e4139281394dbfb02f94b308990d428937c8472d533e72622bb26. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZK6J2238749.
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 0x54a99e1285efda9544d72da0432342d39c633e056846104e7c522fd713dbff16. 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/QZTB22274442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0bed6de85fde50d004f016fd1963f628186f300f21fc5b42803f1d9d92ad6de. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/QZTB22274441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22a54596a2f7804941a9c12d50a9520fc4b7f1ccf4f7d2bc8a8dee6a91e9245. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZTB22274443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc0b43ee1833d65ec3d33e910bc93c62d576b0dbf9135a1d04ec3cc270b82da. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QZFYZ2303565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad8f7054703b26ae0d0ad933e77f917163997f32bbe6d49c86c86132e5b6164. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZFYZ2303562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d91eac92360e63f7e2e52e6c33b13adf9069d34768c96447aa282a5a5b7c5a3. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZFYZ2303564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00caf63a609e0760a561da485ce60ed0143106d783e1daef6c28a88ede57b52. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZDA82329891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1966eabfc4e9a5d57b907cd0862e6054ea17f81449556e8c7450d4dee00570. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZDA82329890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53562f333fee6a953b75f008373d1439af72a02b0db87444c7636a6bb23c921. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHN62392584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156e2333c74aec5e358b474e554d43748687570ea24619ae5ac7642da1658d49. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZHN62392585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fdeabc5c1db6ed38f6a07c8a792fd76d54e1c43f18fcc5142b67cef4e382c52. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ772510815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a3734dce12b74a210eea5b11cac6eededffcf1ad2d22b04d213d80dfa71a11. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZZ772510816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d109088e87554b8fdaecc757b1b98a26841ac9bb5c0e164a950b18609f0f36. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZZ772510817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ca024c403231ce66a7dac8702886fd7e9a27881b9eeb5d3d2f33cff605f44b. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T09:58:30Z), 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/QZZ772510818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74519d48f59b2166f916a9ae2185c298211d06ccb34a346a9434368f21210b7e. 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/QZZ772510819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fce1b91d447aaa59bf507bfc0ce5736dec972aaf071a5f7f35f6c131cb80d05. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:29:47Z), 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/QZZ772510820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426391e4d6628a12faa0b8a48cb929c10ea5e28219a54bd12e2ac8539afc460e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ772510821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb226b4f1df98381be0d24e3d2524ca00bcb7a7fa4f6db5eac8034a368169aea8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NL4DU2000306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5f104f4fdc3c59d3030a5c4d230799e9405042c5514e79f55c7155ed922046. 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/ZAKN82000106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d470691edb797ab578c3cb8e72dafede80afe316e6566e1b8f691d217d74ccd. 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/ZAKN82000111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93ae904bfbc31f8fb9f444867d378c7a3b88fe20a051871f61f6da76538214b. 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/NLQS91700193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1628908a028bf4d1028d8d10294e50c53b9af385f59617dbf1283ff629f846. 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/USHM92005321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8a5af8aeb5f3264b60a8ef8340ba3be18b7b2b912d352a10eadd4d8b742ebd. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ZAKN82700111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7c1cca41137c5a67009cf5c90a410ffe1c7f290cda92f504938520c4c29a68. 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/NL4DU2000154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09eade5abb883564bbb0ca392a3638964959b9006ab01489dee36c353d76115. 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/NL4DU2000155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb697a881abadffd7e79b553af7b645bb4519c1fd13a1fff8bb8112c6e89ee34. 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/NL4DU2000160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796c771cf064f4596cc40ce84c2f1904958e9d304bb255208f580240bb44b0d3. 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/NL4DU2000162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12db84ae122f44f4d62e0023c99af36fbaf9972bd9ef1fbe96214e8136c0c1d. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/NL4DU2000149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb7c4c8babacf8a37b526e00007fb5322345525549529e970addcde2d91b273. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NL4DU2000152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb30f3d3af0a56ab3e88766125d1fa44a31a103ff0cae4b851a2552221cf979c. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/NL4DU2000159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e279639bf1f77b9554fd9e6a80af2a1365e944e8d892c1e75076cae7883781. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/NL4DU2000161.