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 0x607fbe61c0e61f0e3d7a26ca5346981a904dfe5eb23353cc6ee2740aee56795b. 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/89e61542-f9ee-48fb-8c6b-946de56856de.json and https://artists.proofprofile.net/proofs/artist/89e61542-f9ee-48fb-8c6b-946de56856de.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 0x5d1058094bc41d6a4ac84659cda763da8b161f8381aa2d274a982ffe9d2f1847. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/KRB472101816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e69ae6f4c17a39d5d364f3e12814a7471ce7f31dff1d7507bcd05f0cebd995. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/KRB462200383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c97bb0f1aa44447ac11902f3b087089c04beac31d02de239c404d313d00b6a7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/KRB462200631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fac07da71a2cd9a71885babdfc9bcde6d030b3596a0f5e53ffc6fa0957e9e6a. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:09:57Z), 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/KSA002202485.
Where Is Paradise? pt.2 (feat. Yun Mun Sik)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9cd3a1a78a76d8d90498f90354791743926b0d03d10562e85b4c1bcbb83027. 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/KRMIM2557423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254a39bd1c08f26e64a355d139abeb0cc7a9463add4792394c8cf8d70c30a3bf. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:39:22Z), 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/KRMIM2545551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2615e1ba7b2fa44890c4c2351cef39c4390bfbd1bb7de4634058cc4da5fbdb88. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/KRMIM2557424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e34444962f79b7f1b979bbaba87815e5b3336b9471fb6e83dddac9745fc9f5. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/KRMIM2557426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9674235f8809697e4bdfc87483796a95c93592377121c05a566377bf411526d5. 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/KRMIM2557427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed46e4ee2d9a1bb92a2494aef9ce3f33b6af795809cba883d46b0995855755d6. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/KRMIM2557428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d9351a5fb5897aa9e89e4c054e45b53a0f683f6175cbf5cd5da04a4e7bda8a. 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/KRA492001584.
Win Win (Feat. Gaeko, BewhY) (Prod. BewhY)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93f123ef52c9e349935412aedcbda4ac2f3ac064a0991442379ec72ec4bd5d4. 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/KRA492001307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ad78514cd1481b7cc847edc3904966af8f5f7dbc2e6f701b0d5de2a3949af0. 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/KRA492001350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7024723ef521f47c91015f30630aa00d3488367b316a67a88969427159551be. 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/KRA491900224.
Notion remix (feat. cwar, Rohann, Skyminhyuk, untell, EK)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac84b691418068bf77e9396bf15b5b1928950229555b62997970bfdd22b72ec0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/KSB022500311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98d40e04b6a665b51cceec1fa39f861062a7cee5a70530ed1815da5eb80e955. 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/KRA492001491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e45d5bf05f8e689ad22cc116a4c6eb390b2eac3d4e966490e6099c1b1accbab. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/KRB462100145.
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