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 0x6db1502f6e05a52dca2d017121bbcdeddd7b073db24341d0ada65ac531b3792c. 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/ade357c3-65fc-4bb2-9ce2-fb7a9f981470.json and https://artists.proofprofile.net/proofs/artist/ade357c3-65fc-4bb2-9ce2-fb7a9f981470.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 0xfc08242ed23def9cf31f79c92b8f250a7d6b83126f75ae87219708053ecb7bbf. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZK6P2214341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9594eecf07ed1d5e31fa742084f39a9e3b3a86b398a8b988633041f0a920aea3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6P2214343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb696704c04b6588946bee691f45ae8a060728bc40445a0aaead773e5c0d36b5. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZK6P2214345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a27134a88176ab5a46fcd88d27321777ade01054dd4c2ac1eea05b1edd4d37d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZK6P2214346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980dfe053f741f0eef9bf67b3fe1ebe8fd677cd9cca8f3faf7fa436e79f1a6d0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6P2214348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1190f9fc775e06a84eda77e7895a13a37418ab00a6539db9164b6d6cf8dcb0ca. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZK6P2214349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc898c465e55cc3d63ea01f06f0467d0c64594285ac65627bdef0582ed378f71. 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/QZK6P2214350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ec94c8cef11592c4720c8e228b94da5bb26cf3413c9dbf34e048ba1a10d943. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAHB2385046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9184a5cc59a3d2c00909e38ee7fcf8b0f55cf4cdcc9aa3c76a379dd40ca03274. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/TCAHI2308765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8c23f5ba1e64205ea41a3b9b54af404d2889387585b76022db281bc3ed279d. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/TCAHM2313506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab962309b0b9eba3d655f42245cc63188f2ab09df3d35a0aaaec50d1352300a. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/TCAHN2380891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5bbd06135cb4ff953a1255b89f49e7df454bdacc2aeb80c72a3cb14c4c1899. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAHP2364864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b1192920d504cfa5da74883c8bbaece5bc8c0dd11c4cbd83b1c639c125f92b. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAHP2372877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c210e6fc89f301643fbb51886da710346af2165cccc82019c216364a88a2c6c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAHQ2335834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5345a780c05a796dcab5cdfc25da0994591192d5ee3cff470a702e4fba838093. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/TCAJI2572129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a2122526b5da69e9b839d03d52e8cc043ddd4c0df887c56e3c8692b070587f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAJI2572204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24449dc4973a86b873b8422f14177251034fe8cd153b9dd65b6456f50d1cdd4. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/TCAJI2572223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16010397c5611c30058aa9fbdad2561560f564db7389f40d365debaa0349d8f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAJI2572240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf697f2283bd2afc03053bec6f4604f8144b2615ba2eb4586aa5459f6179572ab. 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/TCAJI2572253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee964d28c9480bb2b59502eab6aa41324ab25c825ce45aca802704ed4a71815f. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/TCAJI2572289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978764134950929d312522b5d5de1f1745b863f947fb30b8296a66083e07f89a. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/TCAJI2572107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb774a2676ba3ce628257f830cfb096165bb9b8c366bc6cbb2141c6780caa3c65. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/TCAJR2531650.