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 0xf39e7d17544616a1aa30ceaabf02f3718cb538861c514355478c40b58f9636f0. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a57f60e3-4c73-4b92-983a-3b86821ec6ac.json and https://artists.proofprofile.net/proofs/artist/a57f60e3-4c73-4b92-983a-3b86821ec6ac.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 0x79deb878183a7cd53df005e00e7861e2bff2825a1a3851cf14aeb15ac9dd5143. 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/UAEO12300077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0678084f1616317ee0517e910f62c660e420a477abd0b21be8c0ca7217287744. 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/UAEO12300113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d10aa82db8377daeef6514d7c58cf5a45516b62b93f276552e51d4c09cccd6. 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/UAEO12300152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba4268be7ef0e7984d7e0156886cb3acb3ad132dbd639bcc51cf83da63f8826. 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/UAEO12400244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ec1fc55737bdf990f01711e7c9d3b072d4e7f64f688d379a9cc0796b24025e. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/UAEO12400373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2d43e432acac700efaa55c1a45c179eefd19dfbe1d063b0ca296b71cf1de76. 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/USY242437250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56808ef69de89a0f0b2c4d7cde075c2f17dd8b0b4e38669978ce2f4be6d30dae. 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/USY242437251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92374add49ab41dfddc803210f354f993054f1caa75d2e13d6ea5425e317ac07. 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/USCGH2595751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1587f62e6db2c15763b77c6357578608ed765fecfb38d8fab4fc58d020505b27. 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/USCGJ2542700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b976d0385c58b0b593c66d21883a71c9f994f6d0b8195c19f4c4a7248ec582e. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/USHM22586691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22831842cfee79722aaefd99a21a645fff8654b525c0b340a22a9c98f12c8016. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USHM82575579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23351f60a843eea6b68a5865292012ebcee6435db37ce3e3e39a72d0e3fb0b03. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USHM92588128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47966a4be6d092598f50523eb59088293b2a307f9cbd5d208ba7a6c97a7f822c. 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/USL4Q2528523.
Клянуся Небом (Cupd & Dmitriy Smarts Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd5b205ab8bcccb4823027fc7f0b02e79daa58b9d6ad5efb988793722573936. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/GBMJG2530369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530e40b6886109d1f85263fbef72235a160fa32de60f16a028665048a68d361d. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/GBMJG2530370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a8637a5cc8da0d7e5a189d3f6f957f8fbdad0a651a5d91c41b4f1f49e22431. 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/GBMJG2530355.