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 0x5804b9c0b51c4917c593e87b735e4f471678b3c12887dad711f5ff65d07e723c. 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/13ef5e36-62a1-4460-ae1e-bc21bbe03ce5.json and https://artists.proofprofile.net/proofs/artist/13ef5e36-62a1-4460-ae1e-bc21bbe03ce5.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 0xf3e647e400f818fe6ccd856dd47f2e891b34c6c36acaa71e819d5bed51e1e778. 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/USCGJ1804657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f5eb12f24b45f7a815db598529b36b28cf7db065176ee85231e643f39cd7e6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USCGJ1804658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2a8df0ae9df4fb77eb0112192664310febc1f6f5e3e4f3be939cc7c55026ef. 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/USCGJ1804659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff496d1ae232bd91611df273ad27169afdbcc393ce80883544fdf5b4eb11781. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:46:11Z), 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/USCGJ1804661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72abc3c706cebfefabaae9c83e7d353d7e090daae1053a4f43a9ce6e3a47255d. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/USCGJ1804664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4635e537c9ee0cfff9af36795a7175db3294c5281e9c5c2d2a1dab1512ca62. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USCGJ1804666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d9b4820e931c685c4a037bcfa934cbd11b98a188bb97ac7fa1275ed067be5e. 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/USCGJ1804667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9801ad896d04fa95873ed3560bd687791d802f3b7d734127a6895ef1db4b87. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/USDY42135588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1d871a24d4d02a8319668508f8b5fe377600d272a428ef05088667e3a4802e. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZMWW2327814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84f6d400b124ebca035086dda22f41b7bd715630511041a065698cafda986c9. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:52:37Z), 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/QZNMT2353273.
Lost in Translation (Neon Lights Pt. II)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3518538edcc628305dd53de6729b86b5468dc7682ebe20c89b15d449c706407. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZNMT2353275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0648e07d5f7e92eb5350178f71175beeeb6cbd99250bf155e72c28a6f5ba46. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZNMT2353276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41782e50be5e50e21c0a2e3d57afa1333833d5a4143b038c8b68485a7c429faf. 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/QZNMT2353277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a28e02d646be99e5b9c8fc145487aa6c3dae842eef6959c26a3588b7ca21f0. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZNMT2353279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3632681133062e341d5fe487982ac48a7bf852734f09813fef18131fab8ca600. 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/QZNMT2353280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eff4600526a82ac3c1781962953fc22225a592b1bb74630b7478c3bb532c267. 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/QZNMT2353281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f666b096264f6cd332f9e5fce215558c5e89c2a38932668ef7cee3505c1fa91. 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/QZNMT2353282.