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 0x54027e04de3248665e628ef889e6378c1717ccf26048c3608ac54adaf313092f. 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/4472865c-be53-4b41-acb5-bfce6e11cf81.json and https://artists.proofprofile.net/proofs/artist/4472865c-be53-4b41-acb5-bfce6e11cf81.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 0x895cd733dc8b21572da313b9a74c60ccfc032de965d4d0e0dfc661cc8c282af6. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QMDA72207817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf009dd3ea3f2b8e893afbed27e0b80c1a536f286cc2d680f2081d8606eba201. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/KRB472100492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8495988bd15f3b35676c114f0ed87112aea5f6677a88a4fa802974ba3a4150c2. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/KRB472101449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37abe9ac34784f331c5f7dc9bf75bac4da7903fe7a9350cd41ad14c045c103b. 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/QM4TW2268323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c57fd1843c5ac7e8cc40d3f6c8174c954dc8857a396f2346b4159882697db51. 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/QM4TW2268324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3c3f88d07f64ea2da42cc782a0ab0b2fcab6a902484567351fad2a965434f7. 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/QM4TW2268325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3fac0daa32b8b3ee4bdc0f96cfc91bd4aac5f554ab4cc4cb89842544fafccd0. 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/QM4TW2268326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0823a375ad93543870a96cbd551ff54e6a9904c3b122a9dca719c774341da596. 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/QM4TW2268327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5bfc003448bb5a977da8e6d7d389fc1537f4c6b9bfe06c16f2b0e86867ca207. 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/QM4TW2268328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f878d384a2410dfcea8441b04acfe73b888a3288d1dbacfdff3480e3508a22. 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/QM4TW2268329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b390e911bfa550d173000b4e70c12f43c2ef96194da93104a874094f8da288. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QM4TX2259864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3716c2441bdf3fd2f61925bfec936d164c68ad73795fbda24da16889404d4353. 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/QM6N22221102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e156c48d10a84135fccd6f8ef9ba798d40414008ac508d67aecfefc3e2994b4. 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/QMBZ92273171.
There Are Things That Cannot Be Filled with Anything: 5things
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd6143e33804d7f47d9c4c726fded96ed8601d67f7f26ec2824d50e0eac1c51. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-17T08:54:28Z), 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/QMFME2215177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e71647a30cf757f07eb597c1906b02aa57b745187bc6bd3bdd70455edc5d32. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QMFME2215179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e156c48d10a84135fccd6f8ef9ba798d40414008ac508d67aecfefc3e2994b4. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QMBZ92273171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb7f018a0325ad531f6f1684528b8520e19daccfc2ce49f2190586d68b15a20. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QMFME2288711.
Crazily, Only You (Original Webtoon Soundtrack), Pt. 10
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ccbd2b58d969811b91021fb787ca27c539038ce62e3e033214f7f0adeafc15. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/KRA252403097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e914f036bce7626526d76150dd7c0e68bb960e8301a06e9cf1d7e62ba0400c. 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/USHM91845219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201ae8a0a768849e1491c16106aea80ee3589034eb97a39f0cc3b5d16d429846. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/KRA382209096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33081693bed3bde2e785294d15c350edc1d3ea71741dbdb0641c2d8cbb60a345. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/JPZ922310184.
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 0xe8eb702462039e2ac117a9ef88bfdba656354d4834572916d2a24a948c9b3a7d. 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/KSA012297815.