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 0x460c1e0038d2f1a062b24a3af42422cb2b09f6e4de0359fe0e1a0fd39de906f0. 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/cb5b8049-b07a-46f0-91a7-9880cd5a4fdb.json and https://artists.proofprofile.net/proofs/artist/cb5b8049-b07a-46f0-91a7-9880cd5a4fdb.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 0xda8525ef02dfeec8d52c86f00759d5697b290c3d064f1a993f88f327c4ece6de. 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/PLE781501122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f9a644a6e796789781abd82f77d53c91de9b0d75c5bc267991e60b2746c4d8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PLE781501124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d4aa5208ec9845d3b022387359ba708fdb5e4aa6460d92e15810ed801e9f78. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/PLE781501125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f395ff42190867639149ee5e5724987a0b5729a1e825adbdfce70df818aae3f. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/PLE781501128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3000d973169c2029b960f3c6ee5e47e613067a6155e9755a2655f5030a409946. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/PLE781501130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c737831dd084b7566f4495467e9ecb45f9b4d1ffa4847ac1b9744e4feb2a28. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/PLE781501132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d528871359886d88514b5ca7bf9f77363c9504af7debfaa841e1806fee4b4b6. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/PLE781501133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47bc1005d37e0380058bf9b98edafbb3be586124223c5212386ab8cf211c93f9. 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/PLE781501134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cac408cd857a393bd08f338b11f4d4e8cbf1be56779df1d06cded25b2b0c8d1. 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/PLE781501137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45c53db206a47267aecad39438675b0d13eff7881b6bd7552badf19560b01ac. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/PLE781501141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950cd3818bea29485f7f72d464aff377c3944c00d101ba66fbeebe1a3df51ce6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/PLE781501146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de8337eca93a3718fc6008621d42ccc95efbf1098bbe1bf17b34eda86a0f911. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/PLE781700072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1635eecce7fbd4d4c2a6ac0ea825143329b0c6c38533d94664b32faa97c39d3. 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/PLE781700077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0befeaa1117547ed3e264911b6384680149314a548b419c3f9283b241538bfb6. 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/PLE781700078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10984759f4a45aa709b4763856412726b062b6c0eb7fbfff4b3631aceb40535e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PLE781700079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacccea296fc5950684e0cba3e1516b1af1796db293117057bc8b9cf4d75ac429. 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/PLE781700080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6935035c7ec9c277cb92dcc6a35af3dcbfd90978ee1a2efa95725e1116e83154. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:32:41Z), 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/PLE781700081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826eded769c61380aa85ef01c73f444479575072cde46aa6f8a8836171cecf9d. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/PLE781700083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0dcd7868487b005d282b38fcffdb346c2afa9acf4ccb705d775b8e45d89dd58. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/PLE781700084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ed89d096c584f6d74a8576a67bbbabd8f233d1259b50c9008f245ef89f934e. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/PLE781700086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12affe9b22f491191b367ba18438f185105d256cf2404923346876099e75bae8. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/PLE782400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafec1d8901ccab9ff5badd25110c92e8f342e72f3d73d0a932a0af72b01bf3cb. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/PLE782400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633a1ce37101301bcfe4d2c0c0dfa355cfae94f49024e567bf48dbbd53841b19. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/PLE782400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20970ce8a65eac63c00856dd2ec61519d8e4a805f42ecef40c4b51551e58e0fa. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/PLE782400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce53c38232bb67588102b86f70f3cf141c4015228dba837c91cb691949649cf. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/PLE782400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd18495150fc49cc4d80a0db8872c27f7b925b82064174bdb962b3e076367c3. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/PLE782400038.