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 0xbcd1ae077fc402a0c4a9e6a8862e0e82cb08d2c32c136fa4871662c5e201e2b0. 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/ed3b2b5c-7240-47c9-b63b-4a342c125dfe.json and https://artists.proofprofile.net/proofs/artist/ed3b2b5c-7240-47c9-b63b-4a342c125dfe.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 0x8d365d40412841ce5c746397053340d555e71a8fdf9ffba0dce0e2fb7697c21c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QMWZB1610859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2c1627202714b0ae136e4ce39d01c0aa0dda942c3386c17d981574ef8a67f5. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QMWZB1610860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d55859cc710c8f2b450fae5d37ea40bfcf06497f3aa6ca64f56ea1780cbb895. 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/QMWZB1611889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688c4590858fd0506d2edf667a604815f819fc56b6257e61a85bdd596a173050. 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/QMWZB1710889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b44c9003e0d60932de4429e234e72b236680c2d85afb2fe2009815a1c17016a. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/QM24S1812652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8479d9f9491e1c88cff398413881a9ebb035476807f55991901429f6c542bfad. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:47:13Z), 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/QM24S1806494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745ed530f52ec05bd465d469f4d9f0c39e8ef17c1350f53a3496557c31f29f93. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/CA5KR2010143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ef1d79d18b1a3451de78bf4cccc11e6199de374023ef09c5188f2244e7646d. 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/CA5KR2010144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18291fe2824e4da8c8122cbf4e85c4e9786f0f5915b680056e513bef234bf74. 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/CA5KR2010145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19019eab943e813ff580b940a435762d45308e6f9420dbc41feb64bb1649a25f. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:15:17Z), 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/CA5KR2167887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e17e21fe38983a446f8c4245a0d50fbcbb3feb9d0ea76bef3f26160570044c2. 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/CA5KR2167888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506e1c2ddbd881bb8bf9bce508f1499f69a7e5c966e2c40cce9f711d8d336fb3. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZ5FN2446186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4359ca9e95e08e7f9a0876a1434f7b50d82bc4b3e73898a31fafee80ff321e5. 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/USA2P1804766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7a429b39a15a1fc46ba91f72d7640f7f46e11fcac0342469260a263541dde9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CA5KR2104875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1519e9e82fe114bb43645d2528ba390c4b9499bbea567c6ff5dc55768cb17f3f. 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/CA5KR2152200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce87c5d28d5b4f0dc7fd67fc8edc3e7d06bdbc9f75db066795833acd89a06487. 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/CA5KR2152199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7a429b39a15a1fc46ba91f72d7640f7f46e11fcac0342469260a263541dde9. 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/CA5KR2104875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94166d4bb8929cea9791f412df82bbe28119efd2af1a0307e980d716cbef3e79. 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/CA5KR2102799.