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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cae3c26e4963683c2b33eaa73ba11e6efcfd68e515b22d1266dd93e86e5733d. 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/ae7c7927-2fb8-43ed-9be4-38ed098a7f41.json and https://artists.proofprofile.net/proofs/artist/ae7c7927-2fb8-43ed-9be4-38ed098a7f41.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf7327716d933be8a79e3612f19e3633f4b0cb31a4857a79544336df161ab5f. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:00:29Z), 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/QZHZ61911853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96678ef721e6067ebd295bac410300e9175493e40c319d023d579ede13f955e2. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QM6P42192854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f937c43a49ff95c62d9d59382d723e5c5cfb3bbd9cb2f23dcc6332365ddeed. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMDA72168865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfa63e004acad69c34ae6fda497a6d48a64e068f7764e4ba3a28adac08ad82b. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZHZ52287704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860261f52e2fd403eefcbe118a31a5e8002a436b8ad86c3de8dd4ee7c706e4fa. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNJV2290712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9134cfee5ca3ebceb9f5ba7d0382cd8d0e3fae47dab77ff180082e23f46d322e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZW9L2215761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8c28056d63088efb3fbd8d4739c403970d6f62688d3437ab35deebfbe516e9. 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/QZ5AB2324060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39aedeeaf73875d38df2902696072128b47aa5777d8718ff6e21b1d7463f8457. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNJV2331948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e47395bfb52f72b6beb8cb5a09d27ebfee14239945c11ebabd3c66236f9db5. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CLPP22300067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045c310a6a113da7d7f6e787fc764e4f786fdfb192f4f46ea0809ffe4d18d356. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CLPP22400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79cdbb22bc0498fc8245288a8e406e551c797cc5c7821d2e63531182c7b2ea01. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/CLPP22400068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f8fb69724d5cd91d31fa3d2090f0d5e0787c702934dbfda4527148f7b1dc0e. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/CLPP22400095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1fdcfdb5920ba3facdea19e509ff2858e26ca87c0d08dde2e0168d6f37bdc6. 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/CLPP22400130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd06de9e581a340f727551fa8bc0ede5b865b1a1954cb2b1c899c9c69183c8b. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:31:54Z), 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/CLPP22500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20cb2a2f1e969c1c23c57c1cc54af22408599c1842d92627164afb8939611d6c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNJY2328194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a64c44279c57ca2e038b63b019432d2026426f2f317ed656690ce17faa13469. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6J2124721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7268475384a4431680470142b170066432759d2d37fb4c0ad609ffb3f98a97c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZW9L2458939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ea19464de55f6e5e7ca03c114daaf40922935f0924da42afaf8c5b98c48767. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZGLM2542223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3507c4389dc65eec808ddd9d85bfb7de3a953dfdbcaf70df2ef82f340dbd781e. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T16:21:25Z), 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/QMDA62156999.
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 0xf384936a7ced19f6dda38590c67b7c5225730604ffbef180ab068d45c55b028c. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:05:23Z), 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/TCAHF2336812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4dc1daa673f50cedeb4a5079dc9510d7078ceaa475bb47a4ff2c0a625d58ee. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZW9L2302225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb3ab6ac7990ba9af27c3a9efae0d3a11e693128b88842fd08d882f4633f849. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QT3F22429229.