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 0x9b74a6113279069fb244d58606060125818f36d1ae762978111766fa9bf257bf. 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/16d104d1-bf1a-4529-9485-de7381c75d21.json and https://artists.proofprofile.net/proofs/artist/16d104d1-bf1a-4529-9485-de7381c75d21.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 0x68e010d36c554d2ea1547dbe94e5df90217ff505854aed70b7798449d9d28ce3. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ES44A1600404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff654138b196031fb29b6a3376b6d1e7870f838dd709f68b163a9efa4de767c. 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/ES44A1600409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2be234bfbdc4dbaac73b03ea324b1033b56b37c76976b2cf7461a4b4fd3acc. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ES44A1600506.
Nassam Alayna El Hawa (Original version of Kim Kimedir)
Dilenci (Original Version Of Mistaken Soul)
Dilenci - Original Version Of Mistaken Soul
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd4d8cb1ee73a479183d87cb00c86e98af0e3e11e8e68c619ea5dd6fc1c4c7c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TRA162300390.
Dilenci (Original version of Mistaken Soul)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa888a3cefb5ace3747404df2360fb49671b34db147da052511c4860e42d50e8b. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QMDA62439053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3673a8b2e228c5d8c596f8e18cc7d247e310596a11f1cce822935f3b739737f9. 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/QMDA72429276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c8d59c24346254c21b17a848678fdd8187f76669a9f6590f133699c8beeeee. 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/QMDA72429278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31637ec7246ded22d6fc09d11688ffac6911c19dc4ac11bc4d07ff0c8f7fee0. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QMDA72429279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb06e82be1b383df0e56e792e51c39f34c773bab2724a1d55bbb8cb74362f5a9. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/QMDA72429282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a855f283b9c860b37ab985314f8a1e09cb73d46e5e5229f8547d8181172c4c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QMDA72429283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaebe9c06d2ef147e127d02aa63625fbe05477de7d2ca3c357a5503777bde3ba. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QM6N22513597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55c8c7206ca7dea631c8b5840045e290081c9226423d6ae788fe8d34084dd9c. 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/GBSMU4412199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24f468c2a547528089d5a1d5eb44ec533e39cd5b24ebd1cb8d1e2e3d7394b44. 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/GBSMU4412198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c44c886dd29e7575876d0a93aead49152b6b5f6a6ac1d0467c6ba831d10bfbc. 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/QZES52095393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5ca0e5e4faeef99f86e47170c7dba7fb517cad6c09fe91a333227647d321db. 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/EEHU32000981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd4d8cb1ee73a479183d87cb00c86e98af0e3e11e8e68c619ea5dd6fc1c4c7c. 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/TRA162300390.