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 0x2903dbd381cd9fbe0b218ccc69402ed50e7a88507c7bc6442e0ded00263bb916. 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/c21abe80-3d85-4153-82b3-95b3436c2c12.json and https://artists.proofprofile.net/proofs/artist/c21abe80-3d85-4153-82b3-95b3436c2c12.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 0x8ea8ef50aad27b7348ee4c077fbf5627f5291d25e4c74c71fe9c304c7781c982. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/KRMIM1806280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3eca9936810584a78f0cdaffde2257498144686d7b9621d20da2e20ee603f1. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/KRMIM2176847.
ctsb : KIRARA’s 10th Anniversary Anthology
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1452b2b82b7e224d6d26dc27d3af333770dee9dbd2d0c41803a5cc0a89b1dc. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/KSA012367850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465ae3302d49b74a5fc868aa9544a5ef1e9a0b37613ab5560c9ebd59a5ed4828. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:49:25Z), 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/KSA012373675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1452b2b82b7e224d6d26dc27d3af333770dee9dbd2d0c41803a5cc0a89b1dc. 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/KSA012367850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bab3d96d8852a50f96c126cc09690c009707039490de944764a664fc1d6db2. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/KSA012377912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5afb55dc08000dad3b7b413d793fabae31c4456ec7079a862a8c3ef89afb2e5. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/KSA012377913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd086624d649a1363f5af2611828250e4a82f8671134a6b7d39f9c5cf9c72cc8d. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/KSA012377914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc714be8004cc0206670cb9fcb59c18c0746f197633c8cee6fdcf99a5397913d9. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:49:07Z), 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/KSA012377916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465ae3302d49b74a5fc868aa9544a5ef1e9a0b37613ab5560c9ebd59a5ed4828. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/KSA012373675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80fd6996bd210de68b72911e1baddfb1a51b4d3ff129d9533b6ae753170c4a53. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/KSA012377917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978ec217c0219c4a1027b7459922d1497f4f79b08e5f213c7523dfb5326e92cf. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/KSA012377918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7500b1c66f5cb3767cac2430b2b79477c3b540094ddf768d0d60657c977f8b91. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:28:00Z), 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/KSA012377919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6385890351467a6e839594546359223995ee7237fa85cb83665d0e8225c5fc. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:57:23Z), 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/KSA012377921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b282c9ca1f09899d008db85d94cfdad813bff21f71830bab6607fc5de96f52. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/KSA012377922.