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 0x238a68851cc765a757e96d0d1f83989c26b5e7d8f6fd4db292618c6c37316e6a. 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/12263de9-eee7-45ad-ac06-a08242519e83.json and https://artists.proofprofile.net/proofs/artist/12263de9-eee7-45ad-ac06-a08242519e83.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 0x841382bf9b60522726cb4ae4b6b26b0246b3bc4dbeba3308f1b0baf75f1d9413. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/DEC160600081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273b747bf9fe6c3be32ba730f73031c7091f75f61430dc9457baf353af131d4f. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/DEZZ52105509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57687473111fe76fac6824f9e5fc9803b85d3eb299ac59c4729b8e95c4954b20. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/DEZZ52105510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25083d885820acd679de8d39060c5f1188525a0a338a9a33ac99ed8366e097ea. 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/DEZZ52105495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bbd60b3b136c66c10343b8878865c7e08c0ba244c83d2e27ab2273912172dc. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/DEZZ52105512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf706df3f3352af8f11ffb95409689fb5a95e1088fb28ae5951c0d8a14a256539. 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/DEZZ52105496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478153b9d7c8b78c7a7718412b7a96ae0148b42e75c9fd85a8678a446ea1a968. 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/DEZZ52105498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50d85635d05e7b9ed330b4411e15926463bc5dcc6b2332e76d05300ec67f032. 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/DEZZ52105499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f2e0956df39a7fa41ee267fc21ff944fb3d14bda20a42ddb24dbfc7bd89cd0. 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/DEZZ52105517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded721bb96d179af69690752644bd7b02484835bb1307a1d80f44bf06e486892. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/DEZZ52105501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600fefa0c4742bc18259fa063a4b4d229104848e66ec93653710d29bafcca7ba. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/DEZZ52105518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df3d40bca4befd3e64499008f85ac3bd2c16c403e3df04733b3c64445ec3fcf. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEZZ52105519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3a55a1872f884c27037c0bb337756ee3e325b9cbe327a48f7a43d807c151d0. 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/DEZZ52105503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710ad6ea3a90d7211beac0c74ceecf37f106ced4b7bf8c267dd10deb44664f1b. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/DEZZ52105521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa603ea743e7476cfe1e5a8bf46295250300bf5a16f47a5dd7a0001ee19138a24. 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/DEZZ52105505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749df69e4e88e1190fb920421fe1b67ba7dfd64e136da640c891e07919c7c746. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEZZ52105523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0991cf9ef0dd1863cd90c31da54ce02afdaebc3630446927bd11020c5580b3. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/DEZZ52105506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ea1b4f9d29baa9cb55d24e9872190a0942ef1550d734e2bd8fdf674fab3d92. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/DEZZ52105524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf08f15f888c7b3802fd5567a15eb12b49fb85818a5973e1017e6e63827a1a13. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/DEZZ52105507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2decdebb8160db822f3e64d4b936a25786d41e9437b944f9eb91284203ad808f. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/DEZZ52105508.