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 0x07411c327d0204819f9efa43a622c08c256ea96d724ebd287c6d26c8332d6173. 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/c16baa10-e47f-4813-a038-d05838f76952.json and https://artists.proofprofile.net/proofs/artist/c16baa10-e47f-4813-a038-d05838f76952.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 0xdcc0818ff75993c518d4fedcc45d84038de6b4a5a85db3c14a7964143fc0c47c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/KRF632100871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0524280083d346436bb4813ad3eafedb63e02c922f12f848562315e91063e0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/KRF632103071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7ceec7333940fb59f6533bf8343b1abfbd4ee719ed393e870e6aacb4b3bcc5. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/KRF632103072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2426b92c37eab924ff298e4eb6bb6fc6abfc83b0e52dba42f39fabedcdc7ed6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/KRNAR2206802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7090e2e649e6a8c52013aed51dd3a33099b195a286edeee1084d3ad22f807f. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/KRNAR2238987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30df98913864445ca9cf781f9e71ca0252f5e749b435c9062cbddabec60bf0e3. 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/KRMIM2334889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7a6731137c83bcff63e313b4aa69a1459bd23fff960867f19d7cdb7910d030. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/KRMIM2334890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ecf2568326473407896eafdecdbfe5f8babc0a60853578d18f2a57f142e20af. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/KRMIM2352939.
Night Is Over (Feat. G. Nine, Wildberry)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef6661126bace010fb22835b65a6a74cbfa2cf41d2c6a9d85771ca5cf8d434c. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/KRMIM2352941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68752a6bcd26c432c1303770a5cac300374edbdbb8dabc429e99533fa2811bbb. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/KRNAR2302558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5b2b27e5e3deebf9187fc95f2049c4aeab03d5af57eca9cc44317b400b17a3. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/KSA012278333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51870fdff76793406a4deaa6677388ebf9faf89a57f2778c1d23b227c83b6197. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/KRMM02316098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af0597cea8dcb2e2912ec28cad697a2c77cc6c0d73a22aa56a25856bcdc8d86. 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/KRD822400023.
On the line (Feat. PARK HYEON JIN, JUTO, Shoi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6e45199daefff022fb7b0a74d7a7fab9c0679638e13c749057ba4382b11f36. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/KRB472300710.