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 0x05717b139a3d1bfd78b31bc5ae789ee7cf8a80711dc0e987e14437d949f48704. 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/c9ee8315-823f-489c-9a1b-eae718e7d0d5.json and https://artists.proofprofile.net/proofs/artist/c9ee8315-823f-489c-9a1b-eae718e7d0d5.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 0xf826a330b6bea9570df9138e65d9b920e80ac542950f51d47f8c1a81af7755b2. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZES92037034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b4295f8953d8d974fec387bf2c40a7146381614934c7586ba05b3ddd2ee552. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/SE5ZV2007104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d934609b413b062c853844359ddb325300981f1b4616dff4ea625d4572ba861. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/SE5ZV2007102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25915080710c6b3ae7217d1298e917e55fabdac05e045ad8237f66b4ecd4d755. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/SE5ZV2008801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c2936e70a33eba65fceb56f59bf7f8c29963d87e3f21cf1966c8305c416486. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZNWU2030979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb093ab5d2f5f486e1f50b3fd29ec11d61ce7b546e8cf8eacd59120c4a7a822. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/SE5ZV2100701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5692b52e4e0b3442213f0c692f4f1842cadb024ee6309afb4c6b6d57fd2ad1f. 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/SE5ZV2107601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b5da3f898b59727ce15814095f3924cd6a6f11c752ff96e5240926ab29499f. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/SE5ZV2107701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63b71f85e478c3bd940b5cc54288e92b4771c41d861321ce5c85f22b47e445a. 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/GBWMY2051100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee63532e8215606f1ba9b6eb1736cb38dfdc050c979aec0a8e9eb09da123d4c. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/SE5ZV2110004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa073e170dca506ec2542a36076862fc0685832d890696603fdc98b0c3adb0470. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/SE5ZV2110501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a433100e8c466635b8ab118248664de894a89871880a4332e5b79ab49e25fc2. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/SE5ZV2110505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea49a4670df41bfec917f312c388c8253b0db9f36561022b1c894f690f8d0a56. 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/SE5ZV2200201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e91f3508126f8b8e7b9747aa46b12ac697856261b9577e620de71ba99e6329. 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/SE5ZV2203101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ba1df2e3f2d24ffc7093ffc21bb6a283253b2fb084fc206d5ca5620282c125. 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/SE5ZV2206801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c36c0cee637d4980726c3ceb4dcdcba31695271cf99943f0ccf46c39a3be18. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/SE5ZV2210501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20494f44ddd8f4bafeef09de80c1b0ca0d46eb64665fc4f6eb0f1d4c14ee4acb. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/SE5ZV2213702.
Bucha (In Memory Of All Innocent Victims In Ukraine)
Bucha (In Memory of All The Innocent Victims in Ukraine)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27a0a04f7bf05d1971682921a68f6248fd94d40d2799f733d5ed07cb39871bd. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/AUMEV2235807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00d565d2d0512d38821e6f7fe3aeadd25557da7699c82deda518c9e61794645. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/SE5ZV2220501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472e32d4b9c0bed33dea20988f0412e6f118c4c38e8a78dcb6f9b9a5c63185b5. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/SE5ZV2223701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993bfbe563c35c7ceb54e562d89481a0f007919d4f478dc54b22f54f88c157f8. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/SE5ZV2243301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96780f3af7e54bed575a3e8a271486b0181c6d1e5070dd7c14ea66bd9a5e657b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/SE5ZV2250001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f57c70a0808ff811edfe65a479068e02ea935e6cb1bd9b2d56fd59be7be8ef3. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/SE5ZV2256801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc95628d8986f9ddaac94cbe6b57d8a79dfb605e4e92099623eccc0100dd405. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/SE5ZV2261201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef6b261cb41a24b7ea3d345afa82c0726f923992237d8f0f5c4b68817e1badc. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QM4TW2360750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92a419c90ae69755a83e7add2cb68d5c1b461968bc04abb7027b766c7ea72d6. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/SE5ZV2305101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b00a4bac09918bbee336619bfbc4c0382e0240ba80712dc7af428e101605eef. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZES82309149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215e0509f7cd557fe516fed2e12f95ca56ce51edd953f8bc348a6165a289ca85. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/SE5ZV2311001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b45d404ab70d414dcebb6609c0f477f9da3a3966fade4bf04762dc7a2372abe. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/SE5ZV2323501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54225fa52fec28884ba0221bc926c7bd0466bdfe7bc159cb300334afee9059dd. 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/SE5ZV2331701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479fc8a8cdb177f39b60b8549a422a04f901a40840336084f0cff3f70abf7502. 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/GBPS85413613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5670ea78f7975bac54263d973bf9c56d7588bf13ad56d6119041ee6ff2e21565. 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/GBPS85427162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0331f147235013a4541fe704963e3022ee9f744247552dd9c83f848f0ea3947. 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/NL4WT2500047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1a7eb9d342e1840d3399ed3dd61daedcb6d77ef3e3cde92721c387421de866. 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/NL4WT2500083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98cb77c894737ce2d261755dd178e5ebdbf5c5b5f3b3386e9298f4d469d121fb. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/NL4WT2500100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44dd1716c2dde3bb27bb349ee41e074b67ebb20303441150850f0c4d4e40c84. 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/NL4WT2500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe769b3ec3a9cf25ef71e9baab870c927c4456797b9d653fdd1f813b518dac5d. 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/NL4WT2500102.