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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dde9e0fa3cb7d74e5bf50cf2a693c2693dbe922d1436d041f496c834a2338c2. 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/eb154a69-a36a-4971-a467-f8409eeb5b79.json and https://artists.proofprofile.net/proofs/artist/eb154a69-a36a-4971-a467-f8409eeb5b79.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708429b23a725b46915d8aac84affb7dac387fab6480ea99505ff14582ed5872. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/FR58F1100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719421d2179140f84ed247a9a6845700029cb9efa5b0ec605c882a013acff81f. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/FR58F0900010.
Conversa de Botequim (Noel Rosa/ Vadico)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ef9ed5d2e17318ce28ee6109a228fd55532d56521f43b633f61fd7c794128d. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/FR58F0900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d660dd7aac4d5c997407cd60cd10aa988d78acf019bb967effcd014f285e3bf. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:29:04Z), 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/FR58F0900060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e07f3f8b6c4deac0c996e333a8635f040276d4e57dfa6e4fb09a7af18545f03. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:42:19Z), 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/FR58F0900090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8619252355e4c329b3b0a4c15d5f010b0c9ff5c441d4453ea81c95810dc2ab. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FR58F0900110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c50370f074cd8fd705b709573e054e3ae34a636fbeb432a49d98017ace6b7c. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:22:09Z), 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/BRFA31600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe230df35ef5d358e14fd8538f678038828d91a1f740887d00dacb60e5673cfa9. 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/BRFA31600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c75aea7e9a0a82abe4816fd8bcbc7d64a9bca81b2fe08ce16598b766c8a8d5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BRFA31800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52bf3f1f2c9183d24831ccf6dfe8df6b299fa176b1d0aa216ec9319b2ac08505. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/BRFA31800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e1f2f16f4c03295266a0e6aed34e4eb6c101fb0771e0b70e88363dbfeb0435. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/BRFA31800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a05c2d285d94001d55b0e7555544264701254c272cc93c5644086d2a310b25. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/BRFA31800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2c3e09a2fcab67fd57d026d67e26c8c70546c9f2071d15836177a44aeb5792. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T23:03:14Z), 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/BRFA31800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef17b1e330035c1f7863257a9ed00ea4c48be94ae77661dcd6edc317e002e67. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/BRFA32100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1e5f52cfa2760c8de13d3095891024fce0426f1ff4e9eff2e5f9e2e73039d1. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/BRFA32100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa502265ab7c96e316df718b05c8d66e8695e32ff112bbbbbcfe64d943dbe65ba. 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/BRFA32400001.