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 0x83ddf419a73cadf6008e9626a54c5d6342b4ea4aea45fd1a5410ab11ec5ee018. 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/c4c4f166-6b36-4222-8232-51d5c7cc5a29.json and https://artists.proofprofile.net/proofs/artist/c4c4f166-6b36-4222-8232-51d5c7cc5a29.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 0xcdf2f715acc1fac3c20f3693a388af49c177c8d91a365d36daad8936dc1ca2aa. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/US83Z2120785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930e5e9d93ba677f36cc3a526ea9da511335eaab876de131c2cdcc63686d3471. 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/US83Z2120788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0c7d0c62d09e198f75ee9720de9a6e309cc4ae89e6bff0b647c052a793ea5b. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/GRFM12000472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba3b54be5eed1be6a1247d5f5b774b41319eaed174a05f652383bb9f50b17c6. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GRFM12000496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba3b54be5eed1be6a1247d5f5b774b41319eaed174a05f652383bb9f50b17c6. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GRFM12000496.
Astradeni - Spring Mix - Extended Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae91ec6a3b3ab9fea3b4ffaa058fe53f989eaa5248a2852dbce707376458f757. 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/GRFM12100097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a70bb4deddc0327bc60dc179d1585d9887ef7a759cced99ca669e980f4f985. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GRFM12100195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0cae685d89761e3fd68b6f5d67e28a2410b8d5f71ad2b3617dd05b7c03fe6b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US83Z2136178.
Ta Matoklada Sou Lampoun (ThroDef Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa78653f82176d4af9e9bcf0d4648d651a05b70ea5bfa104c99ae0107060a099. 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/US83Z2323949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e3d92f3cf8f210d15c66982d3244049b2b12b89b1b1d78e8a6a74c3e0cd65d. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/GRFM12200582.
Ta Matoklada Sou Lampoun - ThroDef Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3e686757adc017f8af71aa270bc00fd6cfdba492d1787f141790e2986574a1. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/GRFM12300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037b65a0b86499bafc1a7f922246298dab173635c4152f257861150ba459d595. 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/GRFM12400325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76100e90edc9d335817a1cd08276fc17cf7c32844390d7e62a443973065964de. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/CHD151700256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4be82715afaf8ab16b8c089a43c4d8a6e50af1b25eda3dbdd741773a638ed5. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/US83Z2513103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e2b2da3fee1e1bac0343bb6180f4c5f81cef411c1bce916ceb36536da5484f. 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/DEKB72557604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd38dea9a3d74c0cfaec2ac25bfcd90ca55c77ee23180d68feae83383b5eb83. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/GRFM12100469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2193c929b734420deabcad096af9e1914a0ff2c2499683615fa2dbad815c04a. 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/FR85U2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ddd4a17af5f27fdee36a845aa61cdc5bebcaae0db8d07b71a7d757b648bcbc. 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/US83Z2121224.