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 0x9053ffdff9405be8f9d08d40d6bac0310bea7fa1e00ec074baec3e29b2f3b68d. 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/57fbaf56-1521-4e13-9b97-338e23eefea3.json and https://artists.proofprofile.net/proofs/artist/57fbaf56-1521-4e13-9b97-338e23eefea3.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 0xe05e48ecba66972a155dffec8617bb9f17cf883354d17a6d5de0e9f8005582f9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZ2QB1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161105219328b5e2fc037d43fb561e469ffc2d7867caacf182fb52ffe8da8368. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZ2QB1600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2fb81ee6a7114a9deaef1efe9561e9dbd4bdd2c8d068189d39effafc4817d51. 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/QZ2QB1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585fd795e364312a91c96672660c1999897e4bd604b9581f1bb304e063915e1b. 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/QZ2QB1600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd8310e5e95232720efa994e66015584a2d5f921047e7f1b17cd8b8c5f6df0f. 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/QZ2QB1600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf32d643f5b3627efdc4d9742a99d4456451f98f3a3ce8796622cadafba1e79b. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:56:38Z), 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/QZ2QB1600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d78081d7a8aff108be7c82a07e2046c479d9808624da6375daa733036617c46. 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/QZ2QB2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d2a49f3340ea02fa5a4030571904a91782f29952867fcb45a5725c47df3c76. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZ2QB2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f393c14c0eb5e65315f3a16e97a301694d1020087892880a4898799a382d306. 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/QZ2QB2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108092609687640274465a5924e9441be9bc25254aca5e629fe17317ad575626. 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/QZ2QB2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1826bc4cdbb973801c3ae4dd4ee6d581bb694ee1876269a03726eebeea42882. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZ2QB1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f749c896b4444ed67a219c68307904290239275876fdc292b5d7039d0c2a25. 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/QZ2QB1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046db9206ec5cf0347d58b297537f323eb8ec7be3f94e8b2062d20d3b1250c47. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZ2QB1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f31979f2a42ef84c4f2f87f034d57d6779a22e6b0b51d85149f0d7932bc3e4. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZ2QB1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213b3459f54f3c4a9e08107f40db46aff4c1649cb5ba20ca4258afd6b04fb729. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZDA81887924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89a5d25f4c8e8ceccd23abd2d25893db01cd8d4df6ad36f9a192e075f71cccb. 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/QZDA51826005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2e31590039320bdb4f6acd7a5c8da1fd4df6484a3d8b1a2b2f9b9dee3d40a5. 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/QZ2QB1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f9af8a4e5f229f34c178fa08596ce0aaee028ff567265d6c4899d200cf78ed. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCACY1730809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2090fa325114f131221b4c745806b3fa722c1905d7887b015dbdcdb1df6a8716. 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/TCACX1715269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ef2406e0945f7f3f27570d9601738c17e585e0fb64f20ccb7de622c1f7c2c6. 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/TCACW1735079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05e48ecba66972a155dffec8617bb9f17cf883354d17a6d5de0e9f8005582f9. 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/QZ2QB1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63b5dcf7c9c8d7a93063853f61239baef2901d2cd09b2a1af4d94dac2bb63fb. 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/QZ2QB1600016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece74e916bfcd1cf97b630c4d3a7088663de39acf98ad326a4e293949ea4fb2d. 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/TCABY1405856.