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 0x7424abce5db42256e30e699a18ff42c6ed09b7fcd5dff618ec21134e8252d752. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4cb4723a-aa2c-4b92-a436-bd73322067f6.json and https://artists.proofprofile.net/proofs/artist/4cb4723a-aa2c-4b92-a436-bd73322067f6.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 0x6a32e6849f672a304768b26ce62afaf37730d708a39ca10141171f495b07bce3. 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/DEBL60601341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecfc42b86e13fbb7904030824f60f5cf422c8d95ce835897f822bac1a828bf20. 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/DEBL60601343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb59fd08a2717d9b3bd2b21cc0d675c7c143dfbf673310b79f3101b601b3f643. 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/DEBL60610204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05273b4a393eb75c04f09bff4e397903f702735d81ef12d5f84daa39de77491f. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/DEBL60610206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f715a9c38250e50f3412eb016aedf5c6bfd5e9e411fbb8f0c34b7dc9dbf2e33. 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/DEBL60610205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51105acd0873ffa5a8cef76adffa83cbb9af3490ead9d55e5ab1ea22b6dd5aca. 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/DEBL60610207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d848bf6e3d8c1fc6555640fea61917cdac40252f3f7b98c04339b4fae1844a. 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/DEBL60610214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a4e8e0a12dddfeb1fabed539b6505bc41c204e1251b7196fae48285bdf6b96. 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/DEBL60610216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0855bcb5322c03c4b966e9a78cf2467cc45306820497aa7a549d96fa43267b3c. 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/DEBL60610213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68acd8c25555217fc9be88b21177c2719fdc10f2ddbc658c744ee79bed1a3def. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEBL60610217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386afcbb57a995c1174b6f5b38a428a46b49ef981b7b929d258cf0e147ae596c. 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/DEBL61095123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27bcf14818566ff1dd92fe77e969b62a02f075e88f98cfe9528392190735a5e. 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/DEBL61095133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7092d19a669cd1bed58e567d294657d629f4e17ce94c125deeceebb44eca0110. 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/DEBL61095140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd502643e61bf3ee64e98a30ee07bcb324482d28712f97040035ff12d0a868a. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FR96X1620748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193170c5101a802a09ddf28ef188759615031f69b51363517609ecb96692e3f5. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR96X1620749.
Hands Up Bombs!, Vol. 6 (Pulsedriver Presents)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b93bcff2ef43402fc1a7b40d26e7e40d499183c8ac94eb07ac44a6e48412591. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/FRX201547343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299fb5d7658dbc4b5f93d12ff178a384a86d20b03b43f5027e945146151889da. 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/FRX201547345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05273b4a393eb75c04f09bff4e397903f702735d81ef12d5f84daa39de77491f. 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/DEBL60610206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51105acd0873ffa5a8cef76adffa83cbb9af3490ead9d55e5ab1ea22b6dd5aca. 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/DEBL60610207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71892fc602bb86d6152e676a132e1bc0862d05f65e7867ae760ae25fa6c0ad8a. 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/DEBL60610209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06916c61af216c52fad2255afac09533bcc8e380d796855c60eaeb4b4af5e4ef. 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/DEBL60610211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa64c772651de587b33f8cde2204c41108c9d1a9a867229b9e2e1c9501489c4. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/DEBL61136777.