Pro is an abbreviation meaning "professional". Pro, PRO or variants thereof might also refer to: People Miguel Pro (1891–1927), Mexican priest Pro Hart (1928–2006), Australian painter Mlungisi
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 0x1d9dee3f39dcde511fad2baaa39c534a14c5b5213ddcf58626d1286927de7731. 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/765d1bdd-4f3d-43f4-b778-67961cb58dfb.json and https://artists.proofprofile.net/proofs/artist/765d1bdd-4f3d-43f4-b778-67961cb58dfb.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 0xf4759e22b71da74f14c6e780c3fed5c34b8ce10165d6710806baac8d2eb1bfd9. 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/DGA0R2325842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79ab120d87b4e9f66d17ec6744ce155ac1992dd361e31aabdb8382a7b642af4. 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/FRX452467593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb776b172c084b3f13ee00604f26bd6ac388138a663c9a99b3cdf6c69cba9a3b2. 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/DGA0L2384624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeecad6e09314a4c99d013ea0d1c271ea2acab93eb87103ae84fd2141aee6bf5e. 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/DGA082446242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417e1bd53282f02c8d2e20b299279564310c0ddf4633c8e869add56359f17161. 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/DGA082444577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454a490684ad5f55b0ba30a7ead748dec9a624e8523e51ace5d9cf0b03800eed. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DGA072479004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210a6c434e5f3e964881541fe0c0b6bf7fa3cf4f178977f1ded1aaac04ccb612. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/DGA072439990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6bdfc0a3b53e704b1f3445a3bf215b815f9db63b7299d96b6d888664f1df25. 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/DGA072417119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6875710bd21adfab3ab5b688a773d7f426e3db18ba24f8bb366f789e75def45d. 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/DGA062405656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ded4dff2cc9fc0e146ee697867da9032935c1ad6e3cb4a49684b87ef89c05b9. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DGA052487215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ef904731f6fcd1ddce8dfebcbcd3ee26b5fa2b98ebbda1b015d663881ca2f0. 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/DGA052431675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3dc8c65351184df2726692241e3f61e80b4e912dc7d811c9f24600ad679c0bf. 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/DGA052448544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2718f00afd5b12bf79acbe9024ab55358756dca9e4b6a02e04a897f790f5b48c. 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/DGA052404151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987d4b557d3478b014ba70adb4d64dfeef9f930c72d52e9c99d4f56801aa59bc. 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/DGA052402377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc78407bf931fc35698104ba5520610f11ca5655044b3b2b41e8b3261b1049c. 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/DGA052405245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9859a47fc843db30b21ccd3ae87ead87145f60126b222a1b47f7dee3308febe9. 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/FRX762449441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb98eb67562e8d1eae64b5ec78a0b5f4a58dfd0ed3d374f90993be6feeb20ee. 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/FRX762424057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceed53414c1ef749ab7ee657fee7f896d36fa5ebdf53c9cbe904f095d322b534. 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/FRX452403635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867cffc21d9a369ab44fff69da70ec4614a7b632ebd290ca0fd579f39ec5397d. 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/FRX762426407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ea32fcd91bd7c7332a35a49e981bcfcbb22526d74ec3d9388c2df3c71d6f9d. 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/FRX452425145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4824a9996cdc5548aa050958efca0a0d8f865621e6522db26bf3086b17efdf. 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/FRX452420852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292c524cb869523039da0a96a94bd58eeea55a1fb241e6764a8b5991c4124101. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/FRX282415199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dfe79c9ce59da9c9bf321eb0ec84f850275fd14e5bfed1c3f1d4e6f502eb974. 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/FRX282413644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b6ee7e359895976884932050264ee55232c50e80535afc58bf208ab76e59e8. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/FRX202464901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb18028a651126bc29fd4e65397293d57c5fa695d1df74a1509ac30b3d7b437. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FRX202455064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aae67f308fc43277f2d5383ed12cd770022bf50c9dbfe9c6ec9288a3c18ac3b. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FRX202455242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5673efe208edafb7ebbc17c309dc1fbcf34807559b6dfced79e69805ff6a03. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/FR96X2476037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7614407e2fedd4e5be52080d4e8b69d5194386743854fe36b375c1abcfb93b8. 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/FR96X2441892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90553bd21a17a7f00b00b2f44dfbab5c6d092b789eb00dc8ce0fe638bc1b35d1. 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/FR59R2452606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd129ef0e2e2ce8af8181b758f1a468e3bf32617e29ee01c72c8588b3fb1b24. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FR59R2472569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa027e07a33db3383a7173d63e62d3fe66afeb77b00f835e46c44d8b2ad66c1ec. 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/FR59R2470817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a7afa76b41cfd4d83547105765836a1f93788bd2f839ed330e522c6f461af7. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/FR10S2435272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c177010e8b3952f4988a1fcb55e70d4363556fc5b22d1f3eef44ae8a098c84. 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/DGA0Q2391678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04127ec03fef6ea292ec6b4f1aa6635ccd35e7778f8034258e74bd0156b5eb3. 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/DGA0R2346929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0effbac7d6b2462a338b0868906d0bbd7e453be45b26c986bbc645dbf5f80730. 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/DGA0P2305710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4a32111e3510b515ff8af94dda3f0fdc3c2ed8e17448b6ed4aa9a0178bc7a0. 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/DGA0L2379831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bfb78bfd8a12ec3c459341bd297698c2f5accd7a1162c9c15e45914ffe3b0e3. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/DGA0L2384673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d2dc47be3474ac1e7dcbabc331f8b5ddfbaee11ba6245b2e0cdc9ddd6b3e95. 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/DGA0L2353087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba078ab37d0354bd1e4871e2985e6db2bf0c7ef1cd2bdf6ed49fbe6965fd520b. 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/FRX282329651.