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 0x978ae5da4f964afe1e155b4583b8bbd643f68f6216575238ad2a11b196477e70. 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/c6747cfe-9551-4f23-bf4a-8b702baa53fc.json and https://artists.proofprofile.net/proofs/artist/c6747cfe-9551-4f23-bf4a-8b702baa53fc.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 0x34f4c8d59a8564564e0c19c6f743a7e2487db185bb5404fbcb123f0ddc4fcebb. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZS662236300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6bc910186647f8b9e422161d05acc811699608fca6ce57553b7f9079c1928bd. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/QM42K2371144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40321f0b5ca7cff5f9833bf32c4eb0df38d9c81e8968bc8ed21c2000a74426d. 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/QZMHM2329766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6bc910186647f8b9e422161d05acc811699608fca6ce57553b7f9079c1928bd. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QM42K2371144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846dcaebf881f515a07e7b4d290e4096472da8e1fbe9b0d89056d1132aed3bff. 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/QZS652358137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8750534833ac1e9329991b4899604a4c64fdc41403b58a23dbfd60166ede27e. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZS632319139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a99ce0d0cb687868c47640fc828f50307f5a9245bfbf1592ef9e469bc71613f. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZS632317524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4144d058d70a1c697d403fe944aced1177b9b3c429aa41189cd888c552f719bf. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZMHM2353363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0784e86a58d79b3ee609b2e1aeaa49ffacb2f1db9526e2b0a18d84ebbd16dd3e. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/DEH742442080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43514ef018ddae5122a0705882c1fcc1f83f3f1235f190818e85e2d52aa4b667. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/DEH742442081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21edbafa167622fe06c8ae090ddd97519d6d676ca559a620ca1b5c31a04ecb12. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/DEH742507369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d00be40b4d6a95592a19d4c4be66361d0c9ae44cabb71194fbfaf8e4382d89. 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/NLCK41096110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180cd851289a4ac1dfb9d83cd190aa81c3fc65104435bf112f0ee1fa786d70f8. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZS632399882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5759d55925a1c739a5c36b4b4eab8d71a11351b50161b4523f3737513d1ce26. 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/QZS662208020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7548953a5bc332e738cddaf7331eb69ad3fbe16c3080b8dfb20d59c199e4c909. 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/QZHZD2129418.
Feast Your Broken Heart (Bollmann Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8bb03e4a8e2ec879d726ed45f79e2dd6856500f342bda4a753261dda825fdfe. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QM42K2199069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d46f4fddb546a8b612c9b5da812a9ba831089e94bae998999d918cbca01dcde. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZKDK2074284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b32c275fe8f5a8a2b8c12ff6bdb4668cd9c7cfd66fc74678e97b742313b05e. 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/QZMHN2044596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7092851d1d365e39c311f49418f12063f77eb93335418897ec23d4e62be0f61. 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/CH6541647412.