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 0x841f4cb413982214059790a0dad0583432d7686ef9fec650077dbe0780f1eb37. 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/74e780b2-71b8-4a68-b003-abc1cb55b54a.json and https://artists.proofprofile.net/proofs/artist/74e780b2-71b8-4a68-b003-abc1cb55b54a.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 0xf4c82c3d2113a70b00b8685c4978bd8cb8c1026a69d8db78f301fa7f4f70708e. 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/GBKPL1417234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c6a5aa12555bdafca9ee1e472e90b0745e996f799cf83f73aada129903eba9. 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/ES71G1609031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd52a58b71bf6deead65c8d7bc7ab3c16fcf3d1e3a8ce36ef9ecce458c2aba14. 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/ES71G1609033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44353e434f5094eac742ed7e3cd19947794fde2559085d9e80a6e6b59551c73e. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:04:56Z), 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/ES71G1609038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54a556dd2db4dc0848cf75dee4476e899a02edc4e15affd2fd6558b1a0356f3. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:00:42Z), 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/ES71G1637053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa75bd99333746efad56e3b6aaf2b192e33de50630fa1726407da487551dab4. 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/ES71G1637054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9a3b8b35031395e08d395128ed3779fa4fa4c889c267f4d568eab42be38495. 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/ES71G1637059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4acd5be4fd4179406c56cdb276ebbc2b8ced2ce60dac3142390eb2df672ea8ba. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ES71G1867443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134a59b9a29478de2aef36f64957f7b3c16aa2c214dbc9a192d5c37a630db38e. 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/ES71G1867446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977e33195f1de89664f1ae0863196c0a7c603d9f1ba738d9364a4a8f593204b6. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ES71G1867450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c099146045920010459975013b71262ba2846d7fd7f094c2b6c9fdbcfe65186. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:32:35Z), 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/PT5LC2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbf23138ad2e6bfc312fb7392b2e1802d6517c0d96e915fa5c601c455c6c570. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/PT5LC2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d4ec4f60faeb2f2124f90551335226d598357b57108252c6e6c608054b55fc. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DGA0M2316768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f945aa23c1c6455dd10a5021e15cda8256771e98b5cde14c1eb1698663e7ef. 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/DGA0M2316769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f550cceb96cfd15cce231479f78dff25809c01f20bbcc95649cf329201b362. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/DGA0M2316771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863025283f597422bd50696ccbb41ade0f9e2668f5c28b21cfd3b15c5fa59233. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DGA0M2316773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13bda70eb75850aee808551019efb55946782748a0c9883b1504b898920a091. 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/DGA0M2316775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24103e33b28341d91b5c66b8eca767c9c178d28d845f35677e3b8df1bd12aeb5. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:06:36Z), 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/DGA0M2316778.