San Bartolo is the Spanish name for Saint Bartholomew. In Spanish speaking countries it is often used as part of placenames, including: San Bartolo Coyotepec, in Oaxaca, Mexico San Bartolo Soyaltep
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 0x7ceef992056eaed7cf0fd82e12b6e02089b4106a96c5bb5831cb462899bcfe8d. 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/81fe1d3a-14c9-4843-9d07-104fae843f5f.json and https://artists.proofprofile.net/proofs/artist/81fe1d3a-14c9-4843-9d07-104fae843f5f.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 0x97e37f9fdab2d7f74133f083f73150e9882454b78c9dc12b4778b6b9c5e56b3f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZK6M2315428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b947d7626cbee1d2bf00f7ba057741b94f5a54b2f62fcc407971b26a2f78f84. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZK6M2315431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d478608de78b6bda504639bd9babad83ca25c094aac10d26051870bfd1ed11e. 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/QZK6M2315432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9a257dd1f526a7dba25410c9218501d19b646560523e7b9878b795efa9830f. 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/QZK6P2381631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf306d73c939d5a3e20764598e3bae0ea170931ca9f35633c21f4b3c9d75ea354. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZK6P2381633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0940095ba4bb9437e5134bc0f6aba94b7570b695efcd93819d87ec11c1577092. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZK6N2357398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd601e1de2cc706f634c54d0e83d1d3a552964af7b1c73b4760e3e26fd1e29a4d. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZK6N2357399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6074eb582ac3c96f0f44715721503fd32ef587e17c8506e36082bac2ab34692. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZK6N2357404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b34a6cabd4ba1e5c9585e6d60ca057b13ec5e0bc33cf188ab0aea6156fcc42a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:07:54Z), 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/QZK6M2350891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d072a12cf3ef75da6af585fb8374881268d9360ca3f02441806e560018bff0. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZK6L2340675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e19434aa78606a92fb7694b062e4b64576c57ee29f9285e55c64b26272438a. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T03:25:19Z), 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/QZK6L2340678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a88330c13a64f9a7b9e3113209ec2272ac2cd49be37b09553e67210164f681. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZK6L2340680.