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 0x1166c15b1a0c13d17dffaeace524d4f5379fa20139ae60993b346a021c76c39e. 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/677988ca-b504-4c99-b609-9623f8f042c9.json and https://artists.proofprofile.net/proofs/artist/677988ca-b504-4c99-b609-9623f8f042c9.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 0x4fe414d0ddddcd7f5124293ac51f8f5ec64c218833d2bef34e856135a69cc7ea. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/USHM21683819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb121efade22d3fcf5ad16763cf19ac0b028a31caecfbc6f7e25e8ef5e7025e. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USHM21683822.
Namolokama Medley: Lei i ka Mokihana / Kani Uina / Ka Wai Nakolokolo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc13044780bcbfbeec4fc08060f8fad093f2b32ab1dab8c6e27fef8380ca6e16. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USHM21683823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64035fbd942dba6493c2291ac38796125ea162fe56494a2b7c159eb5921489ee. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USHM21683824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8af980dd065370df61f7c523db4be3380e0e8ca613124cfe054997f9122148f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USHM21683825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04dce9416545e7786dbdb678ce39cebff33864a53933055fa5b11bf426198a46. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/USHM21683826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970085457f55b3a36db222906159461668533cd3ba4f24b50c6638f42ec5c39d. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/USHM21683828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fcf0de8ed7d7b9879b37fee030e74abdff2ba23f0c91da6ff1da6a99353c918. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/USHM81755531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ccfd9e48eca15d1f1c63a9b10cb1bd41181af04dcd4e78b816f7cd72b89c2d9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM9AA1831034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c1c0b8a5307d2ceb5711b38c0b7aff0ceb727ceba2371a5751dc9a9c75e70b. 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/QM9AA1831036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc292231f57cc6a431cae0bac8b01309303a858ae27ae76fa14989843109a7391. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QM9AA1831038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1feaada325875904edda5ed36f70716e611281b79162fcf939863810919c160e. 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/QM9AA1831039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404df105a0cb703346afa6e19bb54e42ca8952a8786b31520c16ee1ec481fe83. Chain 2 (Bitcoin): anchored in block 957611 (2026-07-11T21:33:50Z), 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/QM9AA1831040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d56b27a4f7a9a7360ff4b873e2bf50d56240d45a325650c06690b23688803a. 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/USHM22276846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad6cb8b8d8820f10969b1f2f49207d2c6e7631337afe0546d9f483527f291bc. 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/USHM91944403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb9ae35836b2f57f8a55c3196b286faaeabe0eb17eae8c4cc83a88916f47cf7. 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/US8GL2022501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9fa5a7bfd14f6efaa8ce34346be2aa6f50065110da52560af475e64ece6a34. 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/QMAAK2056443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ecaf26b355a5f311233533829fd1afc81591b5cd0408029b17c758e70c5f108. 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/QMAAK2056449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d308d2359742719f0df36c671ae200d7cf18ad69bdd28911f226a9d633cc57. 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/QMAAK2056453.