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 0xe6a5057c8c4c49576660f904178bcc725a0e74b0ca7e4eaf0865de8f17fa94f4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4880beca-7665-45d3-a94b-b10be4c59f38.json and https://artists.proofprofile.net/proofs/artist/4880beca-7665-45d3-a94b-b10be4c59f38.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
La Música de Chile, Chilean Music. For Export
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 0xb859efca6b293f6bf77ddf685df93133985bd2d84e9bcf5d4c05ec5acb36929c. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QM6MZ1573897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c26bb5a54ff81d56956b7811f952fbcc3615f78bc540c0d9fc541561bcf1b70. 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/QM6MZ1573901.
Cuecas Pa'l Dieciocho - Independence Day Folk Dance - For Export
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e948249e4d073b1fa1e870fbdd91fac6ad6a76231d1bad02451553f038f327. 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/QM4TW1537452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf979f788a00cd6b0a37b9545a76cc84a59f3115f222d206bf388c548533cab9d. 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/QM4TW1537455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ab7985a7af6660abce82b87b6221f1546926f7472a6f1babd6e6ad8a66e61b. 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/QM4TW1537459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4d0c14586aed4d4a4119551f060ff320782dafcaddad9a47ea3bebb46a47d4. 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/QM4TW1537465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9063fa2dfcfbf81e579a7a0f518502ab5094b7bd0091c22ad85820ad9e5ee6. 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/QM4TW1537469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31ced8d59ef26b57e61294e5c5d403c8a3fd14860b58493f073d8a9488c62d1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM4TW1537473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2e420cc087fa1ac4625e8b986cce69aee99776c79e1e510342066a7daf4ae2. 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/QM4TW1537476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9717cd66fdfab283c4b5360ee547b8fd9ab1bffa3d0923a19fabfab010d5a54. 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/QM4TW1537479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b6fe74fa2acd391bdc511e3efc914a37b8b08cf1cf53ffd2348d6cbf6de15e. 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/QM4TW1537480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a410a96cc4b3dce67f5e655c3584b313a3e08aee0fad4b6a4e3f88e06f742d. 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/QM4TW1537484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d360ab7c787b55d75f8a75a2c15b79ebd388c26ac8125b1a0cd4f774592e940. 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/QM4TW1537487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f06013ca5fdd2492dc73d07b12e1cbe442536861c0d5b151dc07aa7ca7c9349. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USA561413573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e8bf4d27688d9cdaba8e8833f68d02317f0abfeffbf0dd7f2047c74ea1d01a. 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/USA561413579.