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 0xde5cdedb3ab9e186cc0eb36c19845e04d05afe026e856f8ed4519f6e5446e509. 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/aece228b-74b3-4913-8f91-c9f4312236e9.json and https://artists.proofprofile.net/proofs/artist/aece228b-74b3-4913-8f91-c9f4312236e9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Stronghold Crusader 2 (Original Game Soundtrack)
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 0x6f12ee4176bef79e2cacdd37b8a4b45dea3b6d46f2262392b8cf2c389e2c4c22. 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/QZ4JJ1669725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2870acd561a554d98e6095a3ee5e6ab60ff5e1c23d315b96348edaad75f208. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZ4JJ1674720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc014098e27f0f92b1b8302578e0383929f785579098ff89ad492f3bc934757c5. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZ4JJ1674780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa231f5965dde5c95e63854bd4ecc2d30588a781c5d79fae886e999aa25ba6d3f. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZ4JJ1674781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995db6cab7d770e43235d3842e8b3b2c0bf5c9530d996f26c33e4aceb05fb254. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:43:40Z), 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/QZ4JJ1674782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e361f17ca12e6b7b08b3dee1907736dddfb9d6b8db31661749110b41923b16d. 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/QZ4JJ1674788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc47858fc42b8e33799a965c664b4557ca6e2715f826a01628a569e875d2c37. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZ4JJ1674789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368864a04c44f85f319c1effb0872716181594c47028a842b215d26d67db1b9f. 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/QZ4JJ1674790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9995c0d2b392991444fbde5ffe99cc29eda7839d1fe19394c12a9a52e3f54bfa. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZ4JJ1674791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5d455dc40e5d08daa3418ab503c4002c31030a6b67c4d6b071f3ea5438f13e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZ4JJ1674792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5688004f6976693e89bc64ff85d04686317b550c068b7fac21ec542e63c82da3. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZ4JJ1674793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ccefa78a7a65e62d2b3b83b0920ad5682b93cd1557bbe695a6a3f03bb74402. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZ4JJ1674795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d2418c15f20883b3d0e08d68a90f5ecafe43d44e8d20e6f3f3f76aa42ac4da. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZ4JJ1674800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22183970f5597168e40311c832ba59b8cc183be9578236ccb595d5a4830bf23d. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZ4JJ1674801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0251c79c4e019f8186716d3684f36a4e874318c952aae482a5f5e04898681ea5. 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/QZ4JJ1674803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf587c0395019722478f3b8a46e24921c82e5027e53fa1274b35ca054631930b0. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:19:27Z), 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/QZ4JJ1674804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36e600d240aa05e3e19acf0859ca53bf29ed677fe961a9ed5d574d166928f23. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZ4JJ1674805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3864d3d201932cfb52509247dc0527405b24a7b1a866f7126532dd387a85d977. 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/QZ4JJ1674807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888d34430782e85424ff2faf548bf073d2dc1a2589234b027ee25df00ef7fb1f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZ4JJ1674809.
Stronghold Crusader (Original Game Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6a321c741f9d2c00d97cf740bf0789d05f55fddaa47abc9431ec21af6a3e4e. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:45:48Z), 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/QZ4JJ1674714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95fce62c6962b65e0c43e57d210b11f8eb7d6fafae750ccbaaac8c930ffca283. 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/QZ4JJ1674525.