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 0x22c42d982ae710a4bfcc054b9be2bf4621b3cf4b253753a87891416cb9d2bb2d. 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/eeebbe10-a58d-4844-b7fc-51fd2e93f502.json and https://artists.proofprofile.net/proofs/artist/eeebbe10-a58d-4844-b7fc-51fd2e93f502.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 0x3a3b4a92403b5d728f46121b2ce234c74adb735d8480edd29f53ea3970fb6fdf. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:20:00Z), 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/DGA052345448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f35b346f0445a5891c036cfb12ba5d37bfc30ae7658fe3edd9a7673d33fdbe. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DGA062383738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3728bb841d9461a7f299f335e0b09906a403a42bd086372eef5ecbee590c7622. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/DGA082396826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4953417ffda3d8a7466878c1fa5ea6b7a74468b55de308a53a00686440f710c5. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:37:35Z), 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/DGA092327311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef79fb0d8f98fa84a44c37613239c7f25881e39b73e010b371dca20f31e15ca. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:29:46Z), 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/DGA0P2317276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb25ab50c4214723a1bab1d2b5767f2e52246638f90059fde7fbdb359ffd474. 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/FR2X42457793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093ed38fa16d824f9f68b298dd989bc5aec98e5e51ab4d6f2261ad82fa37aa9e. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T16:39:19Z), 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/FR2X42477935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4662abe3143fcbc1df9bcf20915952d00c28a1cf7debfbaf6043185029c6cc90. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FR59R2478886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ef63a9e726c6415f42cb6950cdfb9a528cd081ba4d15fbd373e31a58d03f8e. 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/FR96X2418520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08cd9814ba67b16c7e3f5fdb29b9304cb8758cbf98c0ccfc80e4210a7484cc5. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/FRX452470647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffd2aa2a6606fb1f4d51d35b2fa2baae80c41ec11b6bed803e68b99ec1fc81c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/FRX872468038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbeac75bf5bee9fda21add52de9f290af1422db3d2bb66fc4a2bf53e5e0d0ab. 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/DGA062486344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f8f1e12de06a5ca83994c7915bdef4c829ef04a6f9d07554bb00367faa308b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DGA092425441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bbd2c7b7a1b0256c24980918cff91a4a274c7a6f2e074163917278b7433fb4. 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/DGA0R2486394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b9083689620fa7448e9dfc3d921f34a6306de980506a7b331ea3e0b55693cb. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/FR59R2517828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c31324d444ece6b1cc5063851b0a457f46142d68c5d841979598053ac43d98. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/FR96X2584851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1818dcaf0d759524c585da4808e383bb054b71d84840640914e2246e204ffee3. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/FRX282539207.