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 0x4bbc97ce088634c5ab122a9dc4f10068907f194a335ce66a63e6bc96145af437. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/96087009-5a32-4c43-9e85-108fac1dbc92.json and https://artists.proofprofile.net/proofs/artist/96087009-5a32-4c43-9e85-108fac1dbc92.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 0x7d3e11474926dbf64a269da059e3e06d02db1441095db8ea5784abbb5d461188. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USV351472839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06094253c99fe3f8af0ace37a959972c8677a4820928bb161ddc1b0229915266. 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/USV351472840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4821df54eb854974a00fc53ec8e27026aab2ac8a7d1d8ba7b7dc52e855b2ad2e. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/LVA100400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa39dd0baa90c96f8e260f898fdef4f84fa49a43c0698a36ba7b19028ecdbd6a. 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/USV351472841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542184c7ab37476e245b5aeee898bb8184b7de6bea914e4352259eb3ba53157f. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/USV351472842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8394a6e91daf7ae0df6cc13176c8b82e2a240aa8a6d1e97925e0da4b2e95e54d. 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/LVA100600116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f896722a30058744384cabccb9a3f62e7ac9b77e24b905940e16e4ce5fe0be2. 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/USV351472843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6214dd8d1a8763d6d684c27a2c01eb409fb9a1c702c759f9f541c4d69ffbf91. 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/USV351472844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2121dd05482312d648fe3f7056c4e72dcf06843d19998730a1721a1a6329a0. 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/LVA109600268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660df41281b89335580d467dbe3b3d1d0cec572c6198c51213325e021632f8f6. 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/LVA100100108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f9ff22b4a6b4aed86034a336ebbb1327b44678e9a9ad1266f8e50b642c012a. 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/LVA109800037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e789ea4a62cc08c818352ff7052995702e5964c7207bc2645f3e42ddbddfc4. 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/LVA100500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8967fbd6c829b90627a898d32581d77105c6a250eb722f8c2f86df3d6425c2fb. 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/USV351472845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe66a3ef49ecab2f47edc8eb2a4bba8d4bb28047050c04c6ce9bffe8cbc7e64. 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/LVA101000185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8860f9fac3532679c0c16cbda1fe3963307b3f3f9b5760f07c193a4b79b44ef6. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USV351472846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4ad510218277896e234b621b6f514bf7cc5c26621d14029e1f5405882265f0. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/LVA101100169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898fc844c6e2480ca8f7a5bd086bb3c1c5f0b692414e3f2f09e0ef255b53e1df. 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/TCAFC2059757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74227cbff349dcadba4a6aa4f2797a3ce91fef121f2ef731d6b433e2857d5d40. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/LVL151502701.