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 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 0x5c71ffa9b5ea2b6b2739374b03ed745b4bef35677f7e915aac9577e5e109163b. 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/e88e9a08-d14b-4894-90a9-1f1008270eac.json and https://artists.proofprofile.net/proofs/artist/e88e9a08-d14b-4894-90a9-1f1008270eac.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 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 0x31e616296c04e81eea88583d4ce22cd1ea16ffdac18045e08fedbf9d38ffbeb5. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/PLB382200110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7e332ab0e9d1f757171748b906d6a6d071215d456c27b9a94f6a6005f19c99. 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/PLB382200173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c039b93c0475a7a5e4ae95f60c126efbbccaa74bee219912b7b53beae14cf3b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/PLB382300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae7cced98138ba008890463b80c06c79bd85b8b0ab59a289b41e262dc6302f8. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/PLB382300275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c133a764db100b05584dd15e102659851fb0cff109ea5e0f0fa306592d0d262. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/PLB382300440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76d1a939cd8dd8b1060f352c8027b7c7ad819ef2fbc9cc90648ac4f167a121c. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/PLB382300551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78666896f3a99da4fc67a8fe46d59f8c093acb2f20eafba7239704f169af1e84. 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/PLB382300552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7e332ab0e9d1f757171748b906d6a6d071215d456c27b9a94f6a6005f19c99. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/PLB382200173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97a384f9c8f60a8558654cef35394c6c1ea5cfd2d67459a9c4eaaf13c00ab8f. 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/PLB382300553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e53633d0d7743989e323bda080601cfbd965d6e04bfdd28dcbfbeb63aa6c7a4. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/PLB382300555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e616296c04e81eea88583d4ce22cd1ea16ffdac18045e08fedbf9d38ffbeb5. 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/PLB382200110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311dfbbbf5ad9e44d13e70c37d5f275884d665c89aed8af4e9a0b802846008f0. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/PLB382300556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc71c905ec68b74d900ab501a7c5cee6760e07ed8c35def0a876d47fd533a2e. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/PLB382300557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c133a764db100b05584dd15e102659851fb0cff109ea5e0f0fa306592d0d262. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/PLB382300440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae7cced98138ba008890463b80c06c79bd85b8b0ab59a289b41e262dc6302f8. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/PLB382300275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8ec8c060971203c650d2589d638fe1fd0fb2ebc31dfb87ed2530e6afae3689. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PLB382400450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895274dc0d1ba62fcf3d11e1a5f326dbc0482dac41da82befd8161aef455bc72. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/PLB382400527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1113661929e707bbf7b1becc59f3e4e121eeaf926dd016bf57a262461e3b43. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/PLB382400596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8ec8c060971203c650d2589d638fe1fd0fb2ebc31dfb87ed2530e6afae3689. 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/PLB382400450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63dbc5a0ea1a2612287f57ac4b7181bfb35a8683ed5d2e0b2bd1f41c06153a5b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/PLB382400694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11efd108af3d9023c130ac1b2268f7a6dd94427f035ff0820fb842e452c1c097. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PLB382400695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895274dc0d1ba62fcf3d11e1a5f326dbc0482dac41da82befd8161aef455bc72. 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/PLB382400527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1113661929e707bbf7b1becc59f3e4e121eeaf926dd016bf57a262461e3b43. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/PLB382400596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488446d2c4b2424b42f69f9eb44381b4a545aebb06480b3513324c63e509377f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PLUM72000563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338e17a76601132be2c6f0e3379939f538c3a2f600a8ea043cff700d185b5261. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/PLUM72000567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a6c582b69a93d0d46ef3f8120314f4c1c1b7ee945a6b2db7d10f8ff4cfc44a. 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/PLUM72100513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686a224698272d91c1e8e43b20eea722250faee350236b476ecf62c69cd8c60d. 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/PLUM72100161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86111a36942f595849673d2536094b263e89ed9432b9bd170d94679c8d2c57a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PLA552400291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86111a36942f595849673d2536094b263e89ed9432b9bd170d94679c8d2c57a. 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/PLA552400291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d7e24828174ca2de4de84f3ecfe1cc301a0d0c4b786db949dea2e05c0ac06a. 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/QZNWW2298367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38687e2dc0659de806a83b604b90902fa89860ce69bd869ffea21f7a506cbd24. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PLI292400837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab465050af38cf4dad011d260d5e3f24a24ab5824b60cf62d5c2923bb0634bf6. 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/PLC062238962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9ad2dc9450233d5f702b75eef347425e6a465d6b005d36fbc74083051dc858. 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/PLI292100326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7871ce8b7bb8ca5d16a93fb834a703169008445b909576be89227d49258829eb. 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/PL2E52400061.