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 0x1770c220119e549385863fd2ed41a1e40b69c60ea8db964157316abf08d7e83a. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a65d3868-d995-44d3-a43c-87bbe853870c.json and https://artists.proofprofile.net/proofs/artist/a65d3868-d995-44d3-a43c-87bbe853870c.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 0xcb8434129a8c89136136749f022fd8a73ad277ba74a07e24f232a4ed71e49c6d. 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/US7852200154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b1434c5a34188c1cbf009aa740a77f498caa8addaded8c9b7a338340252346. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/US7852200155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffd4d788320a0c524cea8a8a980c11d4090824cc6826375a37bf10c5ceeea47. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/US7852200158.
Latin Dance Movements: II. Samba Despreocupada
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09cc88442e63025831cf0e8f9387ba44fe94469ab61f6df3dd79075f5117234. 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/US7852200159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5e311df7a508e1a0c9db2db89d45e1db0b0680dbd6b158fde3ffe2e98cda19. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/US7852200160.
Latin Dance Movements: IV. Beginner's Rhumba
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd8c8235b43be37a84eb22f45d6fd2e47374581c61957ade111eb66b4b2a153. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/US7852200161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a8cd6bd7da02d0abd5e6c4f824a2ac93e7f32a25bc9207809285f44895efbb. 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/US7852200162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6225bdbc1bf8176d232a950602239451351d088435cd42746e2eb1f9758cc2d3. 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/US7852200163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3bd3eccc00e58f65b49dabd17552b0311f3cd213cdc752a7700f759efd92c2. 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/US7852200164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4be3abb12e0b79980e12dbf6754809766a8bd7df1e452e2898711509b72d444. 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/US7852200165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26027673c07c3bbef01e68e24049be41c4b86770abe9d50b9275b46f99fd320. 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/US7852200166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb95ea66714a14f654ad3b63abba1e7a83ad6c90bf29e7dd3f61e450f1372b79. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/US7852200167.
Manifestos: III. Star Dancer + Her School of Dance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbcef32be19c99dfa2079cb9ddf470f2275b31af01d412440ceed04be3d9e2a3. 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/US7852200168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a58af8f904c4d26d2b68a0199026fd4d189ee6a117a9053c8e2a8e03778ba3e. 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/USHM21946728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4169e1f7a8fbe1d7420ae3c48c6acc5597dc16e399fdff296ad8c26c6242a172. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/USHM21946729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df2672c753d781525ea3226df47598969d8e603c9ff5aed81a90c564091dd15. 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/USHM21946731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2844087bd33b9e79677193704c97168b0c49921f4751913370d75bae83470a. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/USHM21946733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ab628951699dae0d42cda9b3cf2fe63811634d95aa985a64ff5cde5c4282fc. 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/USHM21946736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a16a927cd9dae187bef2258b23c26fbb6c83b6d0c5724520175dd37c661cff. 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/USHM21946737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7ffedb9f43f206df7234872d0f19352d8b822d515234fb0af6c94c31dffb13. 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/USL4Q1929238.
Lake Braddock High School 2022 VMEA Conference (Live)
Lake Braddock High School Symphonic Band
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee67c1c346671513edd618d87603469c1eb27f17cbe0b262efbd7fd82b1374f. 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/QZWDE2201217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed479b03e3b0293a00138fd3535bb50d7e2c20fcce87289695957c301719cb3. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZWDE2201228.
Lake Braddock High School Winter Band Concert 2021
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549dbaa96c257941269e965ef2ebd90ce9586d0de6c5b2f23290730a268a5e05. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QZ5FN2205025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9dd9ab39107c1b68fd05780e5fe0cb7f7967010e0b3e5a7a861106694730958. 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/QZ5FN2205053.