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 0x2700e2b17352b6cb07270ed6ec53ae3ccd3f08a449454a2aef76efdb006e3819. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/67a75119-506a-45f5-b195-35fb621dbbaa.json and https://artists.proofprofile.net/proofs/artist/67a75119-506a-45f5-b195-35fb621dbbaa.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 0x5488b07f7b5e0ba30a4771dd3293574f0a017f92cfa4339dbdc84b502329e45f. 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/QZDQH2363021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a4c4e5021914178adf55294dbc16da59009c987a9cc84ac3954f3484bac264. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZNJY2338070.
Como Un Buen Lobo En La Ciudad (En Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb1325128e1ce7cc59cbd18ada9de214e29816cc08c31f8f20f3a62db06d5cc. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/QZDQH2376594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2ebd6828c51cfd7fb397d101dfaf654fc6793a2fe50e8e000dab745ab97f9d. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZDQH2376601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee09c693c6a653d1b5e978ed2bd4e0cebba7607be3703f20003bfd56610c7b2b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZDQH2421240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3668dc991f6dad9f3a2cdde52cfb835ca8f16e35a96a701b7daa45ce868b53a. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZDQH2414921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec8253f7ba5b758f8398d6e3972a789b7483c4fcc5eaf38ed31c7994abd7f4d. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZW9K2397419.
Grupo Nueva R En Vivo Con Servando ZL, Vol. 1
Gente Buena Gente Mala (En Vivo Desde La Piedra)
Mi Pobre Riqueza (En vivo Desde La Piedra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03929145a6cb3e8cb3e69dbaca4c346d7b52ec5a967cb81df1ac5895343093f1. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZQMB2104347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ec177ed5b90e75b919e182f37181d8f74d57fa0c292bf07de61cb9d0f36e2e. 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/QZNJV2405203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19946c96219d5b137918dd454d723ca3f59f22eed7f1b8e13de3bd8ebd3f79e. 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/QZNJV2405204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80876b44852993b89f92f4183fee2d9675da8617d845d2c67378bde7cc8ad9cc. 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/QZNJV2405214.