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 0x74ed32341d7061aa22a2d1c09df3f1fea9a72bcef8d831aced19ef588df26fbc. 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/4fbd6118-4666-49c9-bcdc-1fa31f226ee5.json and https://artists.proofprofile.net/proofs/artist/4fbd6118-4666-49c9-bcdc-1fa31f226ee5.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 0x3b29d064094526c93c4d138ac10609b87a2846a3ed39fdb2606b36092f633239. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZDQH2383351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef053d7892c8b95c5f82654ca5fe552aa97a2b16f532071f375cecf063d727e3. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZDQH2434912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb22b57a989f4eedadc5c75c96729b4dfff81fdaaf960bf0ebdadb98ec80a9ba. 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/QZDQH2411084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fdd6a336dc3bc3bbc52571917bc0e1fbf3964143c6bbb93a98a7ebb6f0f89fc. 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/QZDQH2397939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4445091b98e8811fe8042fee39ad995180c072623ef312d491ca2a70f16f3f39. 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/QZDQH2394195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe938af7ada1909618d74a87f796cb1af93ae1c1293e7f76000a6e651babf19a7. 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/QZDQH2378265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4243e1cd63e48c7a55ac2f24a6aa0b53442f804480dce6a4a06a8d8d06b129f2. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZDQH2368677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f962536a3dc71eca030347bc9fb4505bbcec836e24cb4da67d40948b9e889f. 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/QZDQH2350747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb773595104ea7b4b3ffb224ba8a936cea634d7f3262b9b889e1f6196a4277b. 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/QZDQH1906348.
Soy El Oso (feat. Arturo Coronel y El Buen Estilo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9386c31420054189c69c7eeb64750056628671c38ffa1f19414e1b6e11121117. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/QZDQH1832910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1faf41f819f6d696abfc48cf75fd4f6bca4f59b20e2cd1f1079ee1f9a6a710e1. 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/QM6DC1911704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2406bb34dd3c0666b440bf111a8dce36af7b283908b1af29c9f24524e31617. 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/QM6DC1908254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcdd63f9143ea04dbfd427642b4348892e30f1a55b1c98fb8294e541560f2a4. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QM6DC1906855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3937e93ed2a4d15bca9dc3648b1235197bd7f12079edea2b951dd4ec14e16f6b. 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/QZDQH2501684.