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 0x9ae78d100bc18e6b027df7f43ab7f821267955522c4a95817f4134e363f8eaaa. 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/3c053314-0119-4bbe-9b4b-a8fd10cfbf91.json and https://artists.proofprofile.net/proofs/artist/3c053314-0119-4bbe-9b4b-a8fd10cfbf91.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 0x26362ca222d4788d5738dd7cb3c33183b916e99b27336ec988da980574b41d88. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/QZFZ62395662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf469c867261379f6834a5b3d6ab94fb0da85b0e5f59913ea1eedbd16bf058f3. 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/QZK6H2468485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8b6cfd3163a37dfbb8eaac8a3b33e3a96f4ac647cac3d7bb6720b98e08e5b5. 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/QZRP52467615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5690c1ba85aeace0a410b05b0f6e1f73199177b3c62c5f5f2c1d7396a19803a5. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZTB42404010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b351f0bdad86a70c5c9409f699caf338608675397cac31d480656c716748447. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZTB42404011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800fde7a9e08d9a278f2af149370bfbe7f8a9dff5dc7c55a0550a24ec01407b5. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZTB42404012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627738586d294dcfbc68e1666c846f81d49ca9ccdcc4b0836217be9b94bf4d46. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTB42404013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1ed19db7e53f8085e8c5ade8d430c3eee021d017e29845d7c2cbde3d5d3891. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZTB42404014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba81ddc867e0272fbbc4e4b8fa9c5f94b9b6043356549d8854afa1ddce5c0cd. 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/QZTB92404552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ab6c8e43b8c52b4e5180f64c3011d8d62b64d15bcccd01c174c891e8b117fe. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZTB92404553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05586117310e7b3420906a06545ed0b2b8d9d530547f7dfc65fe0f4000dd29f9. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QZTB92404556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0040bd0470f804a8fca30d9c19a93daff646ce75dee77cbc9083facb32fcbc6f. 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/QZTB92404557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fdbb0e947705b236e46438c55d749ddfdf80127abd0dd53f35bf70af10671a2. 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/QZZ7T2401025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4c0cfcf86d84a691038e12ae9bd3705ecfbb79b6cb12cf0b373b7260204517. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QZFZ22513812.
Floaters Freestyle (Party Like A Rockstar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5e7e8fcd1cc0f2f6ac770810460b2d9f55f940d60820682e74238811a41478. 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/QZPLR2504013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f11d3f28c4059aeedac4fbaf4ef825c26be03e70ee93321520aff3b8eef30e. 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/QZZ7W2521789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92965160099666627f60e84b073828d2400eeef4d8c01c2b105c9cd5a0edf390. 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/QT3EZ2571764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f467637794a99c771173c0a6966abb5da96a67eb4bfcd945b0794eac808b3e. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QT3F42564836.