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 0xcb311a9e9b2c2ee2467a491de719a80668609759deea0e2fa83d3c81106c19b6. Chain 2 (Bitcoin): anchored in block 953678 (2026-06-14T19:23:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/625a6fa2-75fb-4983-9b94-69b76e87b313.json and https://artists.proofprofile.net/proofs/artist/625a6fa2-75fb-4983-9b94-69b76e87b313.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 0xd6853d7ada27f1d2b16b3b7e63f1e7782b10e9fb15f19cc459980ef9a8271c69. 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/BRTRB0600054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f02f7938cf7e37d6c0814fd57f49168a82daaf662942236b4c5a11fba53057. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BRTRB0600057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee4d87f156aac69a9f3e50d033eb04b5c6abf9ac9fe394e4ceab10f37902e0c. 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/BRTRB0600059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4fc37059eb3434043e2d9fe215189999960ffdd22280de29e3ee2c5d1ab4ed8. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/BRTRB0600052.
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 0xf620f02dd700e3f5820415e67c65a02449c4cdc0dc7e082cfb1a59d99c5d48f5. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/BRTRB0600056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf2ae0d4af2c1127b18f0c80ee2548c3135ca35f3ef4fb19fecaab0335e1782. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/BRTRB0600060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6d196e078ff5076921dcc80a6770b4492a8171f408130a963bda4598f7a157. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/BRTRB0600063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44da475ca8dbde232793b2a0501e64d6a25cbe9850e7918868e3685a7c228984. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BRTRB0600065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c117542278f79ce2a2e0ace89c53b39e5106fb752f2ade8b6c3049527a08d8e. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/BXCNP1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b35a0b3b155d8661212cb5671a6195eebead6fd234534bef2696773a7b13ceb. 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/BXCNP1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c081ecc20eda06bb3ce676ba6da1a5cb53fabe526dc59c0d612d8f153fa8bc8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BXCNP1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff486041126f2deead3ae5c530f6ed82151c14ea95801faf914556ae5f126cc4. 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/BXCNP1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9013c3564e4fd0a4ce61a8925170b57a559a5fccf9d598aeecaf3b50562c10b1. 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/BXCNP1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ee2599644101084799dd7ad41a916743787e5bf7db833994e4a5fa2c74a013. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BXCNP1800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8b2f38ccd3205f8cc4387998d0f3d855284f2ca3f406b0db25cd543a2e4325. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/BXCNP1800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5d984b1c895bbbd8a6f4942159a577997585c5992554db188111f30a3e8674. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/BXCNP1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe190c5a7a17a7847991e5bcfd9fc6fc2160f3128018fad3aad8b8c061b9deb4f. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/BXCNP1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95de853aad37106ead0e3196688a3151b673d1642e1df817f40f376a5db18f9. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/BXCNP1800006.