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 0xc90406d5ba23c95b18ea217538feb42964f092f94fe0d45062330f8d3f21062f. 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/7b41bba0-547a-48b4-aa13-c5d5476daac4.json and https://artists.proofprofile.net/proofs/artist/7b41bba0-547a-48b4-aa13-c5d5476daac4.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 0x23356829ef35a74e459f5aa14fa2e3224fea0cd051d66962dba4a47da68e3613. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/MX4971528349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5f25b14e372366dac49d426c7d50b64fc2c9e438220bbc85430cf42e456c3d. 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/MX4971528350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964d3d1f8c456883d034e8cb7b6293dee05e00cf7c720c98c5cd0844f8d716ea. 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/MX4971528351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce7f094a0f6769a13829bcb0f440814fb11a5a0b85ee48ef97b5909ef507375. 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/MX4971528352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83f30312055dbb4efbdcee40d87ca6129fc6f71b6a24409e2c016a011555ec5. 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/MX4971528353.
Popurrí de Sones la Oaxaquita: El Lucero / Toro de la Cruz / Toro Pinto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb984d074a6a5924e4eee21a4212172f273e07d6bf635583b12eac8d86256380. 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/MX4971528354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51382c3d00fea0146a51e146690072bb6d7f09dec97f693741fbea384c1b5235. 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/MX4971528355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc3cc8b68c879fa7a615759f1937d196ef68cccc7cbe7c431287f42712854fc. 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/MX4971528356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6cf3ab8cf8b505085d217f7592c8af296c7be276a0294f2306e74f6d8839494. 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/MX4971528359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb54bdc4b3c99934cbd507573c4904568b8b1f0b26a9d886f9c518b76db8802c. Chain 2 (Bitcoin): anchored in block 960223 (2026-07-30T07:51:46Z), 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/MX4971528361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d17623554b562e1af4f07bebd007e870a58c6e4e2c2865e34a96c6a394f16a. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/MX4971528325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3eefd63498ef93e573619c3d58a6acd02534751c28d1ddf158c2c8b5c5106d. 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/MX4971528326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d297a79342c8d4dc592fbb552c7a3fa9d3ac161e257f914792fa7d3395f756. 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/MX4971528327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb63e02c6d008eedec78444dccb1e63f67eba9ca232e4a4211a68d4e5525d9c. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/MX4971528328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a159cc1a15aca2aa30b458b64655f1df0ae540f6f586f8a490056918dd6ec1. 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/MX4971528329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f1e149b64f3ffa217aa3a91917130b43f17f3918c20f1ab517ac48f6137f12. 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/MX4971528330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf2cb674cee87218ef3cd1551513b9266c35163117a8bff61891e1f2af18859. 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/MX4971528331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22618e24956a0eb8895192b2d56879b6a9c09c9da355cc537d14ecad5f3e6c73. 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/MX4971528332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9491e53a92ed1d2855ee6161e3d009bafbe862f9a627531a69b603d0cc4926ad. 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/MX4971528333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb28e341d4968dee00bfa8876720c4f8854ca355d7d254658dbe552a375a18a. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/MX4971528334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a403d5e2761c6287b97915c80809e8605edbf5ce2b3def9341243047fc9f144. 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/MX4971528335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b295cb02a6ac941e8d490d5d8d851f9a503c466e6095ad45f79983ee51c9051. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/MX4971528336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb51e3a3a7c05dcccf3d1a5e163a72b21f29d7a35b9b632c4b7c72d7bf11dcc2. 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/MX4971528388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1539cdc74c7493456c664a318f1de9ba168d4c543b7c1f59aa9f58186782f266. 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/MX4971528389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bebdb3163da4a6e7e6c7be2a3fbe50bc8e4c57540cfc3363a14a0dee124fb5d. 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/MX4971528390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc26f22ab0a89af97f686467938afc28cd6a9fa7b0138fdc1c2a87316666381. 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/MX4971528391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e42be4e24574f578a06cfdca41bc5b37f30b6489f06dec3cb7b91289bbfa0c. 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/MX4971528392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001b9b098789aaec3dc32f36b115e5400bbe35e010de36299b74fef7ca67fc8a. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/MX4971528393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6241859d73c3633814f08f17624dad501a716f429988009c994072f5b9f796a5. 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/MX4971528394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6659fc295b60d0f2febd2cb9289e093ea726aedd7a35622bfb4afcc63246daab. 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/MX4971528395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49dd20f2de0d4b4418f79bcc1df40e00ba77fb77d90087e713836e04864591d2. 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/MX4971528396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b29e5ff33a0ed68a6fecaaf45c19c26bd26eef937fe3856e6b56cee378817f2. 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/MX4971528397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6533922ec625aebe46ddc8858179c479c6094b6eb5b23d2da4b000c392015d6f. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/MX4971528398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb9581a3b31a24cf2c895dbd0db8191a3a3e00edab1b60b47fb37d53ea0c351. 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/MX4971528399.