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 0x84e977145f5a795ef877bd8a424000b8ede6cda63a3a07304d36a5d5ed34bb31. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/61b28095-3237-4c6d-b7d6-59ad7397162b.json and https://artists.proofprofile.net/proofs/artist/61b28095-3237-4c6d-b7d6-59ad7397162b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
En Vivo en Mc Namara (Rosario, 20.12.14)
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 0x4eb55519113c02b511ab1454b5b1119771efa3553a5527a9a6966b4a447dc2f3. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ARF861900146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788caf18d6ae4b46f3467e3e377d5ccca1a753adf4aa1af06036a01b3980f05b. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ARF861900147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc535516c10efa16ae09d563123d9b8adf22cbbc39c41f6ef1aa98d987108df3. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ARF861900148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b9c676755d12d043da1fbd7937a015af9d0e5a359ea1ee44b1bead6ffc5b68. 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/ARF861900149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5d251e7ef96265b2daf908a44dc4f884b91105b2d156da2434983660314daf. 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/ARF861900150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc60dbcf73557586b750bf03f46dd8813e23ccfb193f82b9adeec3b00deeef7. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ARF861900152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19dd7b8037769cb4f02f2e77ee0091505809147ae2d5b69f13c95b49152bdf36. 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/ARF861900153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4adefab35656ac6d5548328a7b4f66dcf834691ed4643298665c5e91c2308232. 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/ARF861900154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c80641f086f553aa6a0e9af9f53aecb85dbda66574e5338529636fa9010332. 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/ARF862400115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6079c409734ec4b87c9bbd32b4e0185bfefa8c0b39af8b6c48e20038a66abd38. 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/ARF862400116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb51c0fd8ae5e116732ed43148e75c26bb0092536d7da9cb3b33961023234eb. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ARF862400117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479f28e6e06536f3139cad54c6ffcaa529827bd2c071cabf0acfc33f39db64bb. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/ARF861400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6830c9fe4d4694d8a528e73c505c115e56a87a724bee25c4c7dce68825f161d1. 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/ARF861400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707a407f0882a0e0e8f94cbd85e093434dcaabc54f97f045c8f089c9193372e8. 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/ARF861400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0fff441de1849a5af449d97ae493f34e054db728c641f93b876ca81fdb7c842. 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/ARF861400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f64cca892bbe4386511ccb86fd1497d3d8ad3a5cde548ecb6ca55eca7f5d12. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ARF861400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f0acb7e3d3d7c58f7c5d07643b2f7fc9db2592c6929d9f085dc58643ca053b. 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/ARF861400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4028a5b9f466d0682b3e1edab7430586b0a534fec18481e3fa57f432a64a55ea. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ARF861400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa895d38ec1c51ee52aa0a66c61eb6ba81ecfb1ddbaaaffde3193e4fd1773ce64. 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/ARF861400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2acbe2a4a63cd0a7a7fc287913259b12277b5dd01dfd0d5cae828429340b160e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ARF861400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7deea71e14d072cb408de741b81cb0dc696ccbbca364f6840a3bbbeccbf67fa5. 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/ARF861400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ac30d00ebd8efa0dea61fa24d8abb0973232b1ea6d0dfc30424d1ee812d303. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ARF861400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4b6e14069c3c766b6a5ee5c886078f6b09c22bb5bffd8c744243c3be83cff2. 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/ARF862100057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8865005bd10fe676a254bfd66fb179938f0c5a43954ec33102af7658f1dd4d. 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/ARF861500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784710e3c987e2d459aeba895d2898a50303ef2d66901e6548e22bf02d88ab5c. Chain 2 (Bitcoin): anchored in block 960230 (2026-07-30T08:32:18Z), 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/ARF861500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe147bcdf3698987f70c406f04721317bfb650d00d2d27ac381eac81f91ad0d6d. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/ARF861500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8865005bd10fe676a254bfd66fb179938f0c5a43954ec33102af7658f1dd4d. 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/ARF861500001.