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 0x0b36c67583af789e3010622da14c2b81e9deb8ca0f4717fbcb3af97cf8500141. 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/33e32867-6bdf-46cb-b493-a115d5b0fcc2.json and https://artists.proofprofile.net/proofs/artist/33e32867-6bdf-46cb-b493-a115d5b0fcc2.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 0x699de879144173323924537be695e18ce6361b2d21baf0c0a24256006a6afe1f. 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/DEZ650504103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7af31c4e68d191d78cacde1e6b1032ae1827869d1e8bae98ca8e3b27789aaf. 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/DEM092500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0a76835dc661bc93cf7ccdc739803f464461288c6c95e20dfcb71fd94fd882. 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/DEM092500056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f2a7bd469e806341eb9a859eee5e1087d2b44c4ccec781cda954023e7e2523. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/DEM092500044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc85ed2f443281ff2690f6a70d1ab270a88d22d97df1fac9450b356e3c13e977. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/DEM092500041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39620d1202a2b83f865ade9df25c3cfba2870ffdd87c9b7ec7e8bd11a9b25d3b. 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/DEM092500042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f7676f27528626f7b9aa463af8acaee4571fb7ea7979b94397231970bae8b4. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/DEM092500043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f2a7bd469e806341eb9a859eee5e1087d2b44c4ccec781cda954023e7e2523. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/DEM092500044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9cbce227b7550636f6eb5cff38da175a295e7c786135d57b351b5d3ac07b87d. 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/DEM092500045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06b4e5180c42f3adfcee6bcd015752157b191901956449760c05517c3bf43a8. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/DEM092500046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f31cb0076224083c84170ea167161b629fb08d8aa124919e6068e071a5bb486. 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/DEM092500047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953786c9ec1853e4f5d900feb929802bb19ade8dd2da8459a73f48189ae88d32. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/DEM092500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47453f3d1ae5e3f4e551d5622bfd3feb56472e0dd19670399f15344875965a37. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/DEM092500049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31fa1c61c01ab3f935fd6be59c2ca62ee76921a0aef150e9d3cd152ce42d7e06. 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/DEM092500055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ecfc4777caf600faca8fdff2c2f64a3ef99b179805aa0e0b71daac54a3a5082. 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/DEM092500048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318a66d626f58be55919395f8934b73aa1786a3e3a99d66cf2dd0279673d62c0. 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/DEM092500051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0a76835dc661bc93cf7ccdc739803f464461288c6c95e20dfcb71fd94fd882. 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/DEM092500056.