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 0xe61c8a284c8a29272e2213e13de8e6039c53cf9e609835daf3c05fd4bbc74f89. 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/a6b578c9-fcdc-4cfe-a762-9e150c2fec84.json and https://artists.proofprofile.net/proofs/artist/a6b578c9-fcdc-4cfe-a762-9e150c2fec84.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 0xe9860b3c93be7b3ec6b37d8e02619467283436b752a02f20f23b072c1f7c58dc. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEYU12308027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040e62a4492f9cb31268041962e67ed76d34825655d1bf0ab5418469362c6c61. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEYU12308028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570d95909d11911489cda6c5dd149c293031f57ded6e5cf62d82f69427c128b2. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DEYU12308029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a8484d33829bde8e7c4924bae1c78d8a20e4f3aba86f3d505686c2d3301902. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/DEYU12308030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518816e26b20a200978dcf9221bf1ce6e9c0f049961a624ccf1e7d8806f497b0. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/DEYU12308031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f45209be31deb8e53c261714e5f2bcf512a1a2147f0a5930225b0b64a11691f. 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/DEYU12308067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12057c6faa5ee51f865f98cecddbca10ad73ca8a93fa24fc7d4f770cb7ba5a28. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DEYU12308071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eeb8852fc89ba7e08dcb8f9c868b4e4ebc6a913179b1a2de6b1b0c9228d47ab. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/DEYU12308106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf55f9759ce98893191e7f436e7cd9ffc0fd929e865180059130a503a258a13. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DEYU12308107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ff4cd74b06d27325a225f8eb318f94b05d88a596b9a9f9e0f639f0dcb57789. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEYU12308109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532db6bb8d454551c64b7d8f5fc847dacc17f829352adc9275cb80f39af47fb0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEYU12308110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1efe2fcd5213c6dca3530821989520c933f72fc310ab37a6e550df8a0c2d0ea. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/DEYU12308111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289baba4a7bf32b93ad7fc05602ab8c0a44353e2d0d7002aa59a55f42bc689c7. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/DEYU12308147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4226b06f62aed3b988cacce5bc70726442ac3dd823b1fa4e4754d04d4540e751. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEYU12308148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450a7fe08b876e163de3deb26ae69efdf166e37a955b66cde37e5d413a05fbd7. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/DEYU12308151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49fc0086bf7af07d147c0f4b95e57b68dda365f53ef1063ed9117326787a2aa5. 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/DEYU12308185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78076e9575c92df6e2a613430a3037479f00a7edd3d2fa84320cf57e5460206. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/DEYU12308186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2515828da291900e8f876e459381428aa0a95431067ac4be8cf980b022ee96d. 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/DEYU12308187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024b210ffa5713c04757a0c3a798cbe848bff6812838a41dc82e7eb0628a57c1. 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/DEYU12308189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7482001d2437e28b96d18f80521204833b1f463341b22c79dbf7d8dba168b8. 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/DEYU12308190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1569b4565918d7bc208cf65dbe39de8f600c71faec6682dad9080e04fd9118. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DEYU12308192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128012fbe46e45f2f2852dd54170b9d1696b49bc81d5ceb877eab25f863336db. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/DEYU12308225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597ba037e496d2a62289ed595d2ee212bec73570f692fffedef8c249d404cf6a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEYU12308226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af626a6ff9a38c1c1a93952a3ada1a9442c73b5973b4ff4d84f58f2a4a1f72c. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/DEYU12308227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a629bbaaa5307b3743beff6a4257fc647d825230a6f5e2e73d88eef0727215. 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/DEYU12308228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e4c23d44d2705226f834e95d05a68c3dde45e636ff71f4c64ba46a9b323ba8. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/DEYU12308229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb2860d6c8217ab524e211ea686d231dd223671e466d4fccae6a3531f686b97. 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/DEYU12308230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31264b2cb6733ca8b41ef11336052e2ed060dc2bdefc7bed3682b31b5bc70233. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/DEYU12308231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7f5b83efaa48b08e1907387fae60f6744511f7bc02a902608dbec7fa92756a. 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/DEYU12308232.