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 0xc3dd72e35f4408ff2825f3085e068f22d27cf7ba8c0136966e316815fdb04d22. 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/5902b0d1-dcd9-49f1-988d-2d817764ef3b.json and https://artists.proofprofile.net/proofs/artist/5902b0d1-dcd9-49f1-988d-2d817764ef3b.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 0xb4fc3e7789987895d816c1ab248ad719b7e9c893bc2b493871dd0659acbdd687. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ESA031429029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8decd6dee1606b8ed73253245a89e91ba697fb337c81b365aa35afb99469eafa. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ESA031429067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b304cb15854d049bd39cd22448d07bb19f437d2c0859fbeec844e4bca950f8. 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/USDBB0992503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd310934e85743e72d50db323b1900b0e25b5229656481a07e2513541eb40d122. 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/USDBB0602056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19cd7160ad71d1bce023ee9afcd705d80eeb3ae4b70d3205e91f77ebcb7bfce4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USDBB0605289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7cb88c21a580f5b0e0292c0a6b1a8c1fcefdac2ab10af8d4e3a0abc2fb0105. 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/USDBB0606786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd243c70f0321038649f8529b7607cda6c41bb69a63905ac79adc9da2f33cc139. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USDBB0992505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c032920d3bb5da40076e3afa5f8c625e2ab2f98142260c62762dd2c73adfa4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USDBB0601355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d11996642ebffc1c89392f7fb43c4eb57e3208ee2638ff22ec3fbc32d889b7d. 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/USDBB0605664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a267657dfd9eec1bab70811574b9c664b6a5c5008b096cbd668bafd404b13b. 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/USDBB0602116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ae559e268e77bde4058e41ff30aff14a0c274bd7bd55cb46be2e65965d81d8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USDBB0602096.
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 0x531b0e1f300f3279d8c4cffcb8774166e8b1bd11d529457ce5ff29be069f705a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USDBB0606931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef67055da944026db49ed38fcb140dbc98019de387c336eca500709240ac6582. 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/USDBB0604664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01cdda25dd7d84b097f47346b147e92031d35e331ef7d5fd97372ef9a234302d. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USDBB0606619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b8503ea25e0c97262642da423a45deba09e11fbd210185f45fbeb4bb88df22. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBG5X1212995.
The Machito & His Afro-Cubans Collection, Vol. 4
The Machito & His Afro-Cubans Collection, Vol. 3
The Machito & His Afro-Cubans Collection, Vol. 2
The Machito & His Afro-Cubans Collection, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ad2a40bac8c58adaf67ea20cc3cd4386392ec0b7892f602af1b68abeb3526f. 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/UK4YS1348406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1411b7aeff7ffd8b1afd189359fb98edf5a3c1acce97c8e491d265e1af44ee5. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/US78T0501230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0390644f9144781bb969bca46b2bee548d86b58d42af7454635ff19b6af285c7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USDBB0951150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1119611a1a02f1b7aa38db1ee482bbe4bca87e25f1f36836f2d9a7a7bea7aa25. 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/US78T0501240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589b5129ef524be249d6d874ad3025b01d344bb5c3804f4140006a131dfef74c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US78T0502906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0758321ea534614f7c75853665b0b319a9a6e8925adab742ee3dd5209427eb11. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US78T0502907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902132fc572f4939b2a8c76f61f7ab6a1d0b3fddf807160a034bf81687a01c0c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/US78T0502909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242ed2bb9525c6f126588e222dcdf22766cf7a58aeb6c8b6b752092b09065eb0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US78T0502910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4993af162f0572771f1b45583f4a725a718354a477ae6ec9749b394f49eca97. 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/US78T0502912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129966630dd572236a17a406aabce4259e8f94f9c89ef2f79086b4b2343db855. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USDBB0991654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057b3a2e5f5953e784941cb2223061ed9397ee7fdd5fb681ffc0ecf769cdbba0. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/US78T0502916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360172a9c364e580a1fe1001b7d9d4b589e9822a701574544a3007922f8967c1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US78T0502917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3d75d20b497302b500c95f48238710d7e903bfd5e18bf4546c4bfd9c1ecdaa. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T18:08:10Z), 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/US78T0502911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f752309e5e36a21442f7f6ed615e34c13cb1e90081167ddd319e299d4061ef. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:05:33Z), 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/US78T0502913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0518d8de501540c03f3bb0600387a27e9ebd845899922e8978d54f477459d1f7. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:44:24Z), 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/USDBB0991655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8712dbe4dc9d74b7ccf8346fe99f00d74a5c467b9b36ce7b6d105138f4a153a3. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/US78T0502908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd6c98aca57092e07575eff51b399543e998ab0f8ec948d8a52a1768f59c761. 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/USUM72119188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9327ce0d1a070821bd3af36ec03ba6462b6c36651856fac1cb2f28cb121fea41. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USUM72119190.
Latin Salsa: Best Of Machito & His Afro-Cubans
The Very Best of Machito and His Afro-Cubans
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0728df7b5f824139a4485a394abfd6200b107a5c9431407dec7c42074155a4b. 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/USA560935574.
Machito y Sus Afro Cubanos: Greatest Hits!
Dance Latino! Mambo No.5 / Original Latin Hits
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58036ff046777659bd7304ad253ff804443b7525b2a4b1792aa8f366e892ed0. 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/USX760990902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0e3dcf513a8fd6e54332c82657a3c9bc28548861facf549f962d0d3ff4861f. 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/UK8D41427079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c079d262da362f89c75251290eed95d2213b95b35034ed1f0d083b4a97806fd. 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/NLRD51401903.
Mas loco que una cabra con pollitos, Vol.2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3fb0c5d44eda8ccaab8c62ff85745404dbc02101673d93580fefb8a4fd5bbf. 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/NLRD51432996.