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 0xb25d2b8d51429fadbc59dff010824d384cb175a7c9390b7a5e09745b8265b3c7. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/62b3b43c-f3f0-407c-9ddd-495b9794bbbe.json and https://artists.proofprofile.net/proofs/artist/62b3b43c-f3f0-407c-9ddd-495b9794bbbe.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 0x9c3b49c32b5fc8df0a7cffeb3ac9df85816bcafec13f042e12d3265517e8e225. 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/HKD012242777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022f65b4f9f341a5fc00533bc8648c395769b45e70cbfb21357d8cefa655a1e5. 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/HKD012242814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b970ba0834589dfa28c790fdf8891f1fb902ae1e64a0bf54609434a1a1e667f. 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/HKG732261128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5481893d535f231c540c719e6e5f254841825ce75783bab756c3d1832862c4. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/HKG732253460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe79c150e293fda3bad092844176990e39fe181639e0512a8b1baa788594b2d. 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/HKG732249966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc251a758b6f9c92756c972c68daf7e76f47e4aa00e8a7dad84c6908f6e55dee7. 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/FR96X2287040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f99e8814c2d86c686f8f3dc83648fa0fdeec63cc8a7060eb96c6b352869a64b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR96X2249988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203bd4f97b54feb98a6a429d1e698841e3c0a871ca46627e1c11c96439fd3966. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/NL8RL2437000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db71e99ec1ab98e59d84803912d735430dfbe02860d4fe759967fcd855bae7c. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/NL8RL2437002.
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 0xfbb7b36102c9d4be46e4aba627b181d0c288a381d3610accf730e62cc52778b1. 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/FR2X42249090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51bf8272a5b41b0d0bdf58e59baa579af1f58d9e8a19fbbcd626057bd4482928. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NL8RL2436535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa177f2ece2208b824ffe3542db55ca5eb78b7d353328292c9bc76ff4a1f49cfb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NL8RL2436309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874e26750e61df7ecbaca109e97a72fe0302ca93e39068e8d3ac9abb15466a7c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NL8RL2436311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089ef94c5ee587fa3e77d967a9d4099d9a1d00b212a783b5ef7b835a5b766490. 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/NL8RL2436312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083be3c3859ac86bbb37332d031ed207189430f319dbf0b0fee92698e6b04ec0. 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/NL8RL2436265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd1467f05421dbe74caa6c5a167b9689b237443188bfd8df0d0e2dde197a5f7. 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/NL8RL2436267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a433647ed1c1e7b28af84b794eebd86eb5e8931fccb1189a3c5e6cfb4f7747e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKG732129083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81cea19dfa7c9c900a6b4684d6763401aa8695d15e06cd9fb7fd273a4f549b2d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NL8RL2435120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e4b4bb065b6ac98ec1f3b2f8afa4544c7db028423a6ab146fe6a44fc83930c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NL8RL2435123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fc50023af804235e104e5eabd672375ce188088783bca6db501041aa8c0e33. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/NL8RL2435122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112ca61d5f9cd42484f9b2f574834bbf6f8bf92bb69667b30b366bfca087a1c2. 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/HKG732143140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaccc7bf12519d9683a6dda2456a852feb2d295356a074cbdf2f3eb2632ca727. 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/HKG732253365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a720aa97fd2d24c7f1c42641d683d979f54c4dcf6bd230f1d1ee90d79c54e8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:49:14Z), 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/HKG732253367.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdd9f5b04707bec8858547d050979558ac82c4c77abef2345861c535f182473. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/HKG732253369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32e5459427d43ef51692509699c03e036a7555284c65bb02c7d9c119db5a1dd. 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/HKG732242642.