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 0x4c8a13966933fa2c21a767b2b48fc440983ebb41a11780c3e942e438393000e9. 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/c4efbebb-ce61-468e-ac6d-e4ae713c6908.json and https://artists.proofprofile.net/proofs/artist/c4efbebb-ce61-468e-ac6d-e4ae713c6908.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Pedro Infante, Cien Años Sus Canciones Instrumentales
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 0xa3791ad0c5f7934dfd5d8d57da6a219d9560e4dc008cc0e2c1feb865737be65e. 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/MXF550900307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4de8f0baebfa6c6dac76d2225267fe1b5c870e09ee53bc73dd1e16e62cd694. 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/MXF550808377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9348b890efc50895ef85683b01037a271723f70a054531e91174fad10667446. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/MXF551030873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23550307761cff53969c249403feb2ba0783820df4d697d9ac85a369e843a6f9. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:43:08Z), 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/MXF550903474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63478e9681fab82c37fe3cb980de9bfee73ab81e88f58c5afcbd8584fb98b5f4. 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/MXF550807574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dcd5142fb590fed096cca87a5d3df06b0796c56925dfe7a9f05bef8a570c0ff. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/MXF550813400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2746d8bfda4c636806b9ce734e326d3001dc310a71975582974d7a1af5423a96. 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/MXF550808223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1411582ca38df53545603e4931352360f3266830dc4d81293a7f7997b430ac1c. 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/MXF551257408.
Quinceañera, Valses de Strauss, Mexicanos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337cc21440f70f9ea8c24b889fe7ac1425d0356d564817088e7c30bd93eb8b11. 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/MXF550903155.
Reynolds Muller Y Su Gran Orquesta Vienesa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342768148ef74bb6f1156dad06021a9a82058a91887db5adb6df6baf70778d2d. 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/MXF550907691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414fd81e230ae41df515f287f755d99a0b313461c0dc12dbe54f76fbf74b32c0. 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/MXF550907693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ecec1bd136f9bbfdd7c2e9ddeac714306b8937869fb6a949f5dddc9d4b4e8b. 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/MXF550812938.
Los Romances 20 Instrumentales Inolvidables
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49be56ecbcea041f79999244a8846c9fdb91dd98bf05d084e688b2522f4df7d4. 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/MXF550903306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13be303f2de2752db29ee5c989272a8fe9cc862adbcbca5b2120d9994f065549. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:19:42Z), 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/MXF550802976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72720734687465f68829264b95aaac9318df997fd3db2cdfcdb51d66cb0d2ddf. 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/MXF550908294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517c9a4d43c72ce99d5427bb744f593deb7548f6dc989d6c2f18038618bfdeb6. 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/MXF550903734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2d49ccfc779577833c4374ac53ccc7eaeb507e9826e94b787ea5bba0ca4a80. 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/MXF550808244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96e08b83ef295651cb4f494b1a628602bacef9409cfc24785dafaa928fce6c2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/MXF550808253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2498b8738f0adcca0ca1e50dc9cc61852d30836ac0439fad46ca293bac3a409c. 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/MXF550808805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeadb21f28b08d9ebf10248b8886a503848b9dca96a7bc022ef37f1d1e08aab05. 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/MXF550600205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85cdff446c46cf3b6ebb8b9e1d101ab152a93f08dd9f9bf9431aa897449d101b. 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/MXF550600206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727ad93fa90381c8b9afbbeee8b9a99b2ebb839953e5ca69a2d6f71bc445fd07. 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/MXF550600207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99fb96d8c8bfa866789f750c23105897b7336fced8a5c5b4f4b6b2869bab4763. 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/MXF550600208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91ad53101e2de5453ed56f8979808cbba7f2062b22ae5e121e3e635adf5600c. 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/MXF550600210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ac1c6ead39fef09477ee7855f8cef29cf9bcdfcace3820d27909c993f16236. 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/MXF550600213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1ca5d55d5c1770d7f0960aab85537982ef61e975cd375561cd2974f21472f9. 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/MXF551153170.