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 0x5cf30e525c7d9b1bd368d82aa133375f7a30f8bf6a766c4e1e8733b2f1c980c2. Chain 2 (Bitcoin): anchored in block 954174 (2026-06-18T03:01:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7f6b7d83-c220-49b2-b102-7ece4367c5b5.json and https://artists.proofprofile.net/proofs/artist/7f6b7d83-c220-49b2-b102-7ece4367c5b5.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 0xce0e1cc41f3dd0bd243f5deed08b2012a4abbde1e8884aea3f85eaa5a74ac7fb. 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/QZK6G2001963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db8ee779006b707609c5d010df36f028e8b4742a4927601b34a77ada36e5739. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6G2001964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c46293eac04a2ffc346f51299dbf88dbe6f8300b958f9aafd1ee23a290d775. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6G2001970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1884416f0810b0dd5eaa720fff4fa55d0f71e0445afc915f6d50e2a8539b8fa2. 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/QZARB1880602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c02bf86fa3c37e437e14ca7899763148e0f48141405d2d3729fa728bb48c153. 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/QZARB1880604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb8ab40d7f0af37ac8e61f48a76b44cf07b4b953d7217b8fce3a58bb3c9ddc8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZARB1880608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9170d7c37bfc401120d565ada2780a2af1c84c1051ba35f5b9ba7e8cce3801e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZARB1880609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdddea9382d183103bb618f8bd9429175be6588fd2c353bf4f9742908f0e33e03. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZARB1880611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881cac01922ed4f179e959d8573e7561b7bf1c84f8e32d9b799fd2a6d79187da. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZARB1880613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8bc7bf3bb39ce748ba5ae3a63d64c53dc13176d1f0f78623e276bef6f8a15b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZ4JJ1631043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce451576edd3f4eb5d65352a20dd05e8f4cfac4e1cb2ab1987146433ad8d4ab. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZ4JJ1631046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369bc9395a1d3b1225ad1bb868ac308bbaf392fef45a32c9f28b70dfffd83e3f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZ4JJ1631047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945cc6ae18847481f430a9eda83d13fdbe3a3af8a7e0a7c3babfe196000b8045. 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/QZ4JJ1631049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e141fba874d2509fb1014e21ca02161a59f2b3f2c693a2af9c2ed3bdaa86a5. Chain 2 (Bitcoin): anchored in block 957287 (2026-07-09T09:48:29Z), 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/QZ4JJ1631050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fdaf4754e074eb9eb9ebb72a6ea1eaa3d44fad5a37af700fdc7bfa067d53ac8. 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/QZ4JJ1631054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa977a2dd0420d9f32c1fce697d8cd282766342cd6e0e62a009eac8a22fc71209. 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/QZ4JJ1631055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2800cd4bd092311338a2b18786574957f42609af0b59d8701341e45d66748a34. 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/QZNWT2138892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2800cd4bd092311338a2b18786574957f42609af0b59d8701341e45d66748a34. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNWT2138892.