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 0xbacf829e25d15fb0b15b999455104934ff7afa6854aa63911df2d904f5ae6d04. 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/8f829082-6beb-496a-835f-d45853527b8e.json and https://artists.proofprofile.net/proofs/artist/8f829082-6beb-496a-835f-d45853527b8e.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 0x39d2e23b966b8c8d81051fc172e83a0b86ddccd045053aadcb04b7cf0ea164cf. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:21:16Z), 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/QZNWX2105082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40e7fe1dee927277d06f9179d8b7fb2a0deaf68f33561f85e18b9eca9678d44. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWX2105083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632ec4a97ab9e2766deb5a2366fe7dea1b1d43af79898f4f67a8828f8a823581. Chain 2 (Bitcoin): anchored in block 958635 (2026-07-19T00:58:42Z), 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/QZNWX2105084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963451cc13c208611d15142fde930c0d24ab6d2c11fd1e9b36432af8206c1a70. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZNWX2105087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6569b880e46c65d0f32fc72a2eab13cb25037b102fcf38499af0a5a6bee3d5. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZNWX2105088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23638282b97c6dc91f275d7d364b052a69ff4b41140e4ed198da7aa2802b28a1. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T04:59:37Z), 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/QZHN72287315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc648e23fda503d82768a27d86317d12d52619a32d0dddd62e9b342a2fd414e20. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:00:37Z), 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/QZHNA2210823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e24ba96ac1155a4646098e02eb9d05d84bd0a3d977eb4140d7a1c95eae6be16. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZK6L2278379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721eef99354b42dfc03e0a0c27b87e9e223339d3b1456e08c16d71c0bc62e85a. 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/QZPLR2207467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe855ea85eaf184ecb27d6d1c52fc743d174e0938c398bc4f7871fefdc272f4bb. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTB62264823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f8f1e302c185c5cf27d38708b2dfb45ef7a44357e16bdb3bebf9be3a69b5aa. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T03:56:00Z), 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/QZTB62264825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ab1db1f4dd61591b153ca485034b6e920194eca23bc573163db61a83396d03. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZTAS2309064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a002a7d0598be2b329ba3dd08303b274e317dcfcabe6b93c9cfb1293eb0f5b. 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/QZWFE2313629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc0b392ca29073bf127e5e66ef8987573707d28bd84b02b5e58f4705e7399a69. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZWFE2313635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f130e39ef70384a2e7ea5c688fff1aa3b5b402a610c1981401468ec20fe508. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZES72415460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddd50e6fccfdff5b7006ec7151c63e74b1795e07d79fa351c2afedf105525d1. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:56:49Z), 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/QZES72415476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef6c40a3b4182f4a5193fe5c1b0586c5109b0af6157b7a255b59c13ec98c24e. 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/CAWK52417812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94709bb9ff7ae9c9f3285b01b3fe79db92c21382db22f74531ccfad36330872. 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/CAWK52417814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8796259c9d661e9179eb939cf33f248881a1c5cb9be8382e38461c5a04b9424. 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/CAWK52417815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac62abe35e5bd7c64ee7f8e34cfcd660176fa3e8acbf0fc6512953225bfd29cf. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T17:08:38Z), 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/CAWK52417816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278c6806d01ff1c8da142238ce3095cf55ae3fa3f8b7072a463d07eb755f029a. 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/CAWK52417817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e912623af89a822fe027b73fc986385073dc8ea982dee4bcfab70ac3d21140f. 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/CAWK52417819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84332d5e4dd0428cb730dccbecf2993da8a33d0417389d7caae98c93979eac7. 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/CAWK52417821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f227f505e0416ff2c9dfde54dddddf445a00fefb8e66c9c26f30edb6e50e1d8. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-21T17:15:54Z), 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/CAWK52417823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0308259345b407aa3b268c20066b37ecf9a92edc1157ba1a2cb437545dbb8eed. 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/CAWK52417825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e33df577c9e853d277e20116ac082819673e6b6ef4f685240a178a946dd68cc. 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/CAWK52417826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca148b53d1c5d3b7ced96dff535ac2cdb6b640a3373297f146d113c429fc58b. 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/CAWK52417827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3262d950ecb1f6b46c5779822176c2f03601a56d7211080aaaf96125f5a3dc27. 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/CAWK52417810.
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 0xe39e66e8319c813a7319cf2a74ab0a08378649e2c93ae4a617cce16fef0e218b. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/CAWK52417811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7a8b1c5034008832e4a788233c895479bd31f4546c8f4a0b6f9788c4541af3. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/CAWK52417813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c7d2151ba0ccca9f13efb4a874fe96e4977d266a56dc0480c58409eaf93624. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/CAWK52417818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7bbd28877ca4254a14f3dbec5cc857e854302c85609b4b4b666e8b6cef432e. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/CAWK52417820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8334df36b44cb1c45b51e4f0d8517293f003b715620c15f896c2e010b8e9ec. 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/CAWK52417822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f773db6db1765e284a0566d3a0c387c3087529d274eec88d0fea714b6ce081. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/CAWK52417824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e84d74210355b1ba12bfc01c0147ded163198c34e508d3fdd640e162c3b2bf1. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/CAWK52417828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c85e02e98d551428a05a8a12e698132f6118defc6d5050033793c25cb11a9b. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/CAWK52417829.