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 0xd0e2e3f4b8d231878660f47eca1360a6f99c3b23817e7aa732fbc0d551dd89ef. 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/4b23a65b-5db3-4e5c-82e6-b15b1b4d6150.json and https://artists.proofprofile.net/proofs/artist/4b23a65b-5db3-4e5c-82e6-b15b1b4d6150.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 0xa0b06e6d3405e250b6441bb1a1282a7c6306a29249b400feba6c1621ca2c139b. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:52:29Z), 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/BRTRB2083988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2fa80d151093e90a7d7d898a917a33c6b88a3e81b1271a51df799bbf9bad737. 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/BRTRB2085056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bed48f0339c084064f3e5f75674756e155bb118e5de26929225916417f2abf7. 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/BRTRB2085057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f6298631a30f494efed89c521d822d2491ef69d4dae8db190ae35e385be954. 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/BRTRB2085058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa27e59d124c374c186012749e5f25b94559fa9e570135d6ac9051224ef7404. 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/BRTRB2085059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f2e5fa6e9f1aeac49c8ccbfb8c843cb2b43c97091164813e15de4e9ecdae88. 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/BRTRB2085060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6b608daf83ec360fce711fd5ffd1363b36cf3ddb8d5d95f893438f001e8084. 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/BRTRB2085061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8715164206ea08743aa3e4463e13be71428453b9c1f3c60a5a660de7ea1bf120. 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/BRTRB2085062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117ce2b254f62edd448c71249f2ec4878a21e2995053377505bdf4cc1a9b2e83. 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/BRTRB2085063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033c44dbb45b00ebd6f6d6a7a89c9a2abc7a1b25379c74db1950eada97dee7ab. 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/BRTRB2085064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5d6382b39b167431a067edfb7d08308c5e863048cfe3fa0a6ae78d0c3ecc71. 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/BRTRB2085065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44dba6a2b281a3a86af29ba4626249aa937c0a8988944046750513f582de0759. 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/BRTRB2304768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41fbe0a15998f37c2159bcd80f10421a6078e9b7acc606bf0349a7e550f8d6c3. 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/BRTRB2300839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e30ea502fc22efe625686e7af1d442796a3967f7946771acd98c5d150cf61a. 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/BRTRB2201447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f974a953cb9981c79b0d02ecc9439a44975fa2cff17557b76612a05bcfa7274. 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/BRTRB2088310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8dddcb1e0d2af3ca6c22176131eed4e4ae3e4a331e0f8f328e6af00a24bb46. 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/BRTRB2077526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc32306358f2f6a3306bdfb61bc5f1cdba2a214438d6b994a51248ba79786497. 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/BCHMR2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf85ef2dcfcdcfe397c2a848816181336069ef3e85ccbe6524977f07612dbdc. 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/BCHMR2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b46bfc0ebed2358ef742dcf32551177b1f8731a3ab4a2c39f5db266682d162. 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/BRTRB2400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb99146d2df5efe4cc18d39cdb06917d0b2d8ec76cc57560d279030bfdf7a883. 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/BCM112300083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145b6fb9beb3e081af9073d8915e2cd5b3980964582620c47b800f90984b514d. 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/BX8C52400003.