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 0x5ad58d1a947c65edfd8dacbbc9361cd8d9b2f806c1e9acc79a6ab780c764aeea. 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/cb095da2-bd75-4b6f-aa66-556a55b5fcc3.json and https://artists.proofprofile.net/proofs/artist/cb095da2-bd75-4b6f-aa66-556a55b5fcc3.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 0x49f43b62806a598dcd5acbedaa69c41a64b55f25edb6e780aaa12dffae888392. 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/FR9W11103250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c239591721c45d64ce35498644ed7e3ac182bd52d7b028132de82843995242. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/FR9W11103259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa507fcd3f62eab064b47401f59b807d487998026ec5f055813c31d5f0131d796. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/FR9W11401711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3bf2885606addc2fc2c1d490e86ceebbafe31e3c0aa40aaa9ec06ce36762d5e. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/FR9W11401710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd124de7b1aa075ec0754be443141d3f1548be36edf7fbff31272da7857bef91a. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/FR9W11401716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46922be54552deee4285de4e6864db4f947b8e1f5c92fe811185da9d7b91aff. 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/FR9W11516425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702124abd1ce44977cd3b5f638881f6ccf9de902dffd3ea73a4a1bb13c1eabeb. 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/FR9W11717016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54180d7df2c87cd7c9ef48f5501d27b96620941a03da2a41f08553d0a8c0a18. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/FR9W11717029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38ca90cdd8b7d7f19c0d485ab6105ed74b515deb2cf565e45dfd89681503b99. 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/FR9W12125077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99066cbed44602bf48739d51bbd6d1e2d569892537dea6ae3ccbfbf0ca5c7844. 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/FR9W12125080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb4817c1fbb8d6a83d3566cfe56d468573174a2ffb321bc25de64ae8d6bde7e. 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/FR9W12125082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c87ded0223aa2077968fda78a97dacd942db95833b2c818f70c7fe7ed3f6380. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FR9W12125083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3142418c7f737625e696f2615f42b5e282525d193978398e709646c7b3eefad. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/FR9W12125086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c065ee1a9e9734dbfba19cc2a3de0e5a82ec3fc6cd97f7be564f5d6141fddf. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/FR9W12513410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c065ee1a9e9734dbfba19cc2a3de0e5a82ec3fc6cd97f7be564f5d6141fddf. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/FR9W12513410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad063065466b88d24ef50f0efab8dbb9f4736c1a0537e102b6421aafc499f604. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FR9W12513411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe614a661696203ba44aa023e28a16aa253a6aa87ae772e5ddfc2adaee1246288. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FR9W12513413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c20484c523622faf93d0da4ddade44c251a57398e88be97bc071aacdd58b2ab. 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/FR9W12513414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c53aeb6456f70442673502b7fb5bea409ce0582b13bd6316163e1b011ccfabf. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/FR9W12513415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a456fb4d8bc1020df8c8d4b58c4e10afa49af3d542324f4856739f291a66cc3. 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/FR9W12513416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6381a284e824970667e46297eb1fff7a2da660a58cdeb959ba702934cda7bd6c. 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/FR9W12513417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3467ed8e0aa0944174c20268cd6cdb2dfef48e2051a193abd060ee8e030abe24. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/FR9W12513418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99ccb0a2ba1ccc1320b2c7731774fd13cf30ed18554dde9c068d495e890d5ab. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/FR9W12513419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05de44372f2e0711619af879cffbb9e1257bf084a0130ba6310d6b3cc11b1a42. 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/FR9W12513420.