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 0xd6011b1bba4ef037879cc5568493b507def1792f5ddb1d06c7cb5c1e0b67a1f3. Chain 2 (Bitcoin): anchored in block 953684 (2026-06-14T19:51:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/662ce11a-fe02-487c-b6b6-f3bf234deaf3.json and https://artists.proofprofile.net/proofs/artist/662ce11a-fe02-487c-b6b6-f3bf234deaf3.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 0x060ef0b9f046b423700c7307a0fd04bca81174f4e6073c01a86668a621ff396a. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USHM22377151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03c14f9449b1df01574298366d67044f785609ba32cb212c0626ce07e91b0ef. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USHM22377152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf05951de5e78cc6c0a0b1eae0122b8dc273d35f4266286d6b286868dca9ab1. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/USHM22377153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e77e1179617ff07d473646ac6ad9378ceffb5d6f31c3b527d591dfaac825d6. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USHM22377154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2450c8289a71fdcb77dc2f143251937a49e8fede5fec5be2a1c95e1ae01ec717. 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/USHM22377155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9984bcd9c24b8f8100b792eba9eda3c68e2dcca888aa3b409d0e0fdb7fc926c. 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/USHM22377156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ac58968ae33c883b00cb6628f36f36f20d765fba66fa5d8c842848476f81ca. 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/USHM22377157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc01fc65725afca1f1eb62ef84836bed2fd72efa0fe93515651076a98e921060. 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/USHM22377158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6fd526c1e7d92b7892001d0b2784e606aaed31908bcb92608c815f439f97ae. 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/QZFZ72422269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3556b08fcdcfba197c814cbc8f72b0f1ca3cd23d02e399a767483c8019004228. 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/QZTB92345402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f31eb38680aab9705bfc5f0ff139c0aa9a07140ac0dc2eaa4eec0e4347adbf. 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/DEZC62364477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544609ac98255cbb8dbeebe7baf8efa71c13e2823c94e923563b79a312340550. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/USHM22331420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359791c06ea6e630c0bf47e3af4fc6848e3f578eb2d53c0454e02a6ca64f7da8. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZDA42374518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb114e3e4e9414de1339a707cfe6186de8d0420328e14032311274198ddbea567. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZFZ22372972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168db7e0243600db3c44983236feae7e37d7d2bd4a5f0208a8b2114a3f8e634f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEZC62297868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7251b53cb35ca64b54789d661a056f6c58b4fc36319b6cf842c3f25bcc8b8c81. 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/DEH742221076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb201f10cd0e15f278fc38f0d7bc845dc0368a83a41c6ad99d908fb358219deb5. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QZHN52255934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0014cf2dcdb59af839a3167641453d8ea6902d33afe13e52e1fb6ccb0ca0cf. 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/QZHN52258160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440cc274b990c5c141c09ae366ca9fa102e71e5ce24780c7420d9da394819906. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZHNC2201287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d74c62e429d2405662e2e4d44c7827c98e6a9f0022ab0b30b14a9b36d36bee4. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/QZPLR2258358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0529dc3d8395c099f466f54c7ce0787460b0bb5b7d06d3fb7b13972602815982. 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/QZPLR2258359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb595254d5d7d982b42e5166b3075e278264364c6873b1712cfae59e6280fb62. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZPLR2258361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fda3df309455d237705409e06d77f97fe0a4ab7052f7ce3db97aa838953f94e. 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/QZPLR2258362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090efa2307d01f27915398b7eaf3ddc007168fd6426c99dfde60e489203cf9f8. 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/QZMEM2209909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094abeb00897f2572682f41d9bd8b9879a999904f86bfce03a42e70bcf713549. 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/QZPLR2258363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b070629ffc5dffd91dc8f8d422d293415d15b356c6414a207306d1752ce0303. 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/QZPLR2258364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f83a69d5e2cfbcd6dc5c24aac24b2578160a3f0be93dc5f783ec25c7823dd8. 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/QZPLR2258365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3166ce632814dcec1cc99c8ce5ada8ea78badc3215ab14d79ff997a4590da225. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZPLR2258366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853b48ed2548cc08c766514280816071922569b7542a123e1b64556ac499310c. 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/QZPLR2258367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1b6b7d03eb351831847930eeb48e78acc5b5d642b3def279e87f5c6c44956c. 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/QZPLR2258368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892443d1f1bda7ca8c77a80a69ab26ca81658f9dd4905f50183266a7829a96dd. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZPLR2258369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a2572807c67257e857693a19eea91326375dc610fcf850af2cdcb05f00470c. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZPLR2258370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a9fcd571891ff0e4b86b8800fabf2ec4893832ebeeee90bf925d7fa3508b8e. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/QZPLR2258371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959647dafd25df8bc7336a05a116b750d8ba1d319301b4e21805c40793b096bd. 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/QZES82399105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fad1551b8510136731f5459f55f5b7bba92b242810dc86c3fad290736813bb3. 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/USL4Q2105919.