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 0xeb1eb06869b0693f8ea363734373c0959520c0adb057cca4026087911e69026a. 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/fbea1ed5-36f1-4134-8421-6a4816958dd9.json and https://artists.proofprofile.net/proofs/artist/fbea1ed5-36f1-4134-8421-6a4816958dd9.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 0x1f695a5b5c3d920092470be7ad43a1a285c14a363023a85b6a281d3aff84640b. 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/BXTQW2300009.
Sun Goes Down (feat. KILLUA) - Guz Remix
Sun Goes Down (feat. KILLUA) [Guz Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc02ced0c8aee382d45641541fb341021d2f56a2ba370bdac50d817bd3ba6ba. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/NLZ542201987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362a00363eb93cd01b372a79151f823b88b260412aa27c1df6941167517bf251. 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/BC6M22407853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932f8112c56f00a85f9b84b8217658b35aa7d366b2be5237a89d3a7df0dbae0e. 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/BCJAV2000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4859cc289b32723ad9e41e5f960fa90851bed41a5396d8353c4cd2dd32a897bd. 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/QZW9M2319605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70591073a9a3ab79c3eac19821c3adf05674e62d345a982930b8b1ec77b341ca. 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/QZW9M2319606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f07f838897f173c702f274e92deb1aabc61508377240abbc6860010ef986015. 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/BXTQW2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629de36a92489e5b54f746bec5c16f45b2125bebd9e54db9308289467f7b4639. 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/QZNJW2331944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d64186ba5c122fc19ba3218444954154060750c972ac85d39bf916d5848cb7. 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/NLZ542201166.
Sun Goes Down (feat. KILLUA) - Sax Version Radio Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3548ecff8af0e6d14f4ee3e1ac7f0e3e190ba63f043e922bc5c5d714bd8396cb. 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/NLZ542201167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f85f828d898d4fcc19a8299fa834f3f4e7ce0518dcd8c41550884fc23318f7. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/BXKG22302093.
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 0x08173e52d3c8d97b2af059dc94e25af5cf57ebfa8afd19b8526f21939c035027. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/BXTQW2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be72f4d432e8a214d959fec8b8fe3632c64315047bdec569024146a372fd59c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BXIXT2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f17b8de924246c963567c7838eb88fdd737135f589fb947c7300cb44939702. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/BCENK2200029.
Sun Goes Down (feat. KILLUA) - Guz Extended Remix
Sun Goes Down (feat. KILLUA) [Guz Extended Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040497e29fd7fe5ee36ab1be14e0dd3d14125ab6a016dfa099fb3af5c322ee4c. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/NLZ542201988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2d82e58376d34e7ad152168a392697bc3fd8328e6a3ec48288a8bb7e9c50ae. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/BRUM72401607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae61ed11246bb99fe8952e77e61d26345deb76517d2a7f3363979008394dfefe. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BC3PG2205284.