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 0x80fc2786eea425d888aa14d442f795c0ca02b0feed1fd8f7ca5be87b0f8e4c8b. 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/9ba49201-6ff3-4d41-8965-a6ffd2c99b20.json and https://artists.proofprofile.net/proofs/artist/9ba49201-6ff3-4d41-8965-a6ffd2c99b20.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 0x4419b887445a7315f501a9304a0d01e80bd23fea43d5687855ea5ff2eed28147. 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/SEYOK1513890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362b99584eb26f4c0bd3ed9e06e654e5e038c8691b35468215ea28f524e7c3e4. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/SEYOK1521934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe917cef4f02eeda9a5d1f36e6af809313a3213777f49d233aaa3217925df572. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/SEYOK1521935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe03e4d115b2611f2560e9acf56c2bc351e8f172072444c677ea4e4d4559672b. 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/SE5OM1700902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42deb0b4e4b4514581c2bcfc1f6fcfa043a4dc84fd9b0200349ffa78ccf5e679. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/SE5OM1700501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585fe59cd34d88da30422a1222628afc98e697cabf00d523330fb08ed31cab98. 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/SE6I32114997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9f100baa7da1f148c55013dcf3be30a20ddff515bafca8a62e107dc8318036. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/SE6HN2281865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8949d6b608606ebac4e5e2f5fed25759a752b04773e555d8d67ab844d359aebc. 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/SE5BU2336158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ca1c481dfaad9894297c4dc62bf44c4544d73a7d7b334f13bf35dfbda0dc93. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/SE5BU2384374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c7eeb46d24810821d639ee2991e71f28969b1f3fb24118078786d81c712c64. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/SE5752357620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2154cc0725eab6916e0579719d6b7471beea115bebe1da40426fa7324a65055. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/SE6HN2332499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8949d6b608606ebac4e5e2f5fed25759a752b04773e555d8d67ab844d359aebc. 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/SE5BU2336158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ca1c481dfaad9894297c4dc62bf44c4544d73a7d7b334f13bf35dfbda0dc93. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/SE5BU2384374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f8a0c25861abdb39b9f974ab16aa7468d30efc468fafacd91c53d949c327e3. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/SE5752332659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c7eeb46d24810821d639ee2991e71f28969b1f3fb24118078786d81c712c64. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/SE5752357620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2154cc0725eab6916e0579719d6b7471beea115bebe1da40426fa7324a65055. 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/SE6HN2332499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca45b6bfaca0a2a6936227e5e4108206c04edcb7054e4e5415eb9fcd34c14a98. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/SE6HN2374678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c10cf32119cfb9b1219873eb6514cd83cfd4739873c34e7660236ddc59c0619. 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/SE6TI2311282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1800bd1d3c7350c7380929de3f73aed47b2b76931bd247717ad3ffc3c224796. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/SE5BU2538471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f0ab5cee12ab94c5f22548cea1ffb589b4dc56c2d973f78d5ab25dfc50041e. 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/NOUM71700386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cea49dbbc6a668e7244e9ac9767178638f3760f35464543c588ba0aad647e95. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/SEYOK2047192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6d9433be35749784bba9f3170263e7dd15986cd10355c802cb9fee2370abdb. 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/SE3Y71300602.