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 0xb51c9a1ec53b9795915461f5167f2085a147321fee46f956737796efcff802c1. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/595c8881-73cb-4f2f-a947-390fb35c8f24.json and https://artists.proofprofile.net/proofs/artist/595c8881-73cb-4f2f-a947-390fb35c8f24.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 0x0cbf5354dd3523b2c9a516805cf600c4009c4c2751eb243e38c191f338fd917b. 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/GBSMU5395378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c49ab4e16dbe01001da11e48632138ee830eb9e7b3010f6abe875b013ec00a. 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/GBSMU7937947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3809de034fa3fb1f04bccb8705ebf1b81c8288767ddd1ec07ef0eac0b7aa67f2. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/GX38U2191277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45162ce474dfafe6c780bf5751f0a1dc96021ad2353c19d147eb6573b1872a71. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:02:47Z), 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/GX4R52294314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536728b88256fc2fce3d070486546835ba7ab9f0bb13362de47e447e1ee221c7. 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/GX4R52294336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33dbf13909cc74e46bec85cb9aebea71e92d8aaa8d92b339d9b08dfdc18b977e. 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/DEYX82161826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fcae81fdf473fb83e37d96ecf008517430a1ca3cd05860ba7ba026a901ac622. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/DEYX82157282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf80394f2e19b1fc903da74faf48bd92f02647eed48a5716c85ebed1084bd36. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DEYX82161823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5c794ab938fe3f22182b29ac0100c4d86a325825e379a3702cf967ea41c5c7. 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/DEYX82164617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936c1553d9faf19f2162bd58d7bf0d00d4b1f4b1a33194e1dd7383cd93619881. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/DEYX82169561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50978fc80ffdafa1e26162778125ce0bf56bd40a7371cd8124077a136e734497. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DEYX82172990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93d3757295bf6865d60993958fc8f8fea206dc308f9c8f8e764f935551bb247. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/DEYX82175377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2082ccc7d2816ecc83201edcd7049a8e71748910d70a225bbbe7965aaff27a63. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEYX82191916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01bec2d963a68cff810899e00ae54617bb9f985a335f4d364da03aaf52495b33. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEYX82195008.