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 0x4a419c98664301439746908ea860e98af4fa49fdaa490a015c6af50af978f0e4. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ea586ee-57f9-42b3-a32b-7024c33639ea.json and https://artists.proofprofile.net/proofs/artist/3ea586ee-57f9-42b3-a32b-7024c33639ea.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 0xd9bf475bceb21bba27356d14ba2940773526e6fe5d112ae911aa97a685964e0f. 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/USCGJ1674818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c6574602d4ba2f5b444a2966fb3b62c596074b7e771be87ccf68ac7ec9a9ec. 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/USCGJ1674820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588f6da60a6c0e8ed6c3cf03705b3421da702ed574de5d0cd936c868789d0cb5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USCGJ1674821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5da56230bf019b0b7a0f24407ee356ac8cb249e0264877eea845b047fd2881. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USCGJ1674816.
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 0xde45bae2a9ad6dcad72a83cde2ee4e5035a0036d80763d689be6135bc5a67dab. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USCGJ1674817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5af3bd762d441955887072218fbeb5fa956a15a18e3a223f04f2a13b0f2baf5. 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/USCGH1575059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd225a885baf7e5d0d826619def8b5c780a897097e504b78dfe6cc1884823465. 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/USCGH1575060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6f654184226619c6c0fab61f9a82698bc7b0296945b7743fed7e14a4be3c60. 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/USCGH1575066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887fca9d78267b224e326ce6d82daeec31ac14ae68342ef91aaabbd76bb78bf8. 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/USCGH1575067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcbd5379e9324940bc746e6489309f194bab4c809aad84ee9e910ccc3f3afae7. 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/USCGH1575068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4287326eca63d7933c4a394b1346437d8b0e3e075688ef652c94f37693012419. 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/USCGH1575069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc577cb3c35e26e60683333cb676d8aeb22f8c02e5b6368b8c805ef35f9789c. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USCGH1575062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508b06ccf5218407187e78f0a6605a8afcb224087b70704ef340de4a33547962. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USCGH1575063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa937d6525cba62356a887b240629822362ffd5d5469217ea6436e8756b0b7e13. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USCGH1575064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52744197560a072666e047fd1fc5398a6a92dba09d02b8fff19204f3ac7d53dc. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USCGH1575070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227c8998bc100b292f3e9d20c1fdc8b2f2ab397bb215c9c1164b4ac327123d72. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USCGH1575074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa0f52975b5067c620c3f267c97dd23f61b60ec971666725cf1d2f94bed0468. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USCGH1575075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5cf22a5816573481d071bf41eb6edb483078c10859b1d1d468dfc63dadc50c. 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/DKAZA1700068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9145564c0dfda95a741ed76a91bc739bc9d9b785c0ea4df9c91b9e769ea9adb. 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/DKAZA1600284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33ee5356e6ee810f69d9024921124a243dc22ec063806fa3b72d8529c8e10e1. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DKAZA1600046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b933615bb0101cf0e674d4cb2cf42f1669f95c77873e4ed7e66e3fbc3706f31. 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/DKAZA1600029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e4e7cc4d1c27a40b5d3de2ba8eaab27bd80df2fbbc7995874dd43e32bbc9a1. 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/USCGJ1674827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b852ecf035cc71e7debad673f05a2da4cd6aafd8dcc7d0b65ed93da08c2cf52. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/USCGJ1674823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9304041c9f78c0504237a5a14929a1713c3aeabcc7fb6e794eb3b43355f606fa. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USCGJ1674824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e613dd5fe6c25e6b09496a65c7ebc053496664423a6b2dd34e5a37ad83738bc. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USCGJ1674825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb7b83a71abf6bf284b2d920dddb6aaa994d326834ca949f4ffd2584226d446. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USCGH1609193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1c9837add8efe3b52ba09df19059ff46b5ea62a6bacefa5800afaeeeefa55a. 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/USDY41568158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ccdbc38d0ddff0852ce1f227bbe29077662586c40a082ce68cd364216189ce. 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/USDY41552376.