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 0xbbc010062dddcca774f1189188746dc4a23aa49c8477ed8c306a7ee4a87c63c9. 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/30595396-3dc4-49fc-885e-7dc383073b12.json and https://artists.proofprofile.net/proofs/artist/30595396-3dc4-49fc-885e-7dc383073b12.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 0xc915b6f1f511bf42c8076a80420429cc15615fb335dfe3fac42c510af1febe65. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/IDA661700474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ee7bb31721a560663a1f2c6872feeb4215ea0f2b80da7ec228ee2207f43d40. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/IDA661700477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5258dd752b2dad5f3037aa6de618f5f5004b50b587090f7f8df1b0bc38eb68. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/IDA661700297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe266fbb6359bbb8ac84800f346cb849b02014d2ce7c5a9d95d4db6b55ffe1630. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/IDA661700300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608a6500a75d6c22c81cbb84e71748cc5fd030e56a9b69d69268303e077c0f8e. 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/IDA661700301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61504e92aca6739dacfdd7ed5cec7217fc6315b9a39f42e35ce7f33d679a2ac7. 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/IDA661700302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51819c1ba1ddd2c2b11c5b1f994542c1e9c4ed4a1cc83b9d242d6de4ea06aadd. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/IDA662001021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efbda751035e8cee3c1b6e2faf4edcd8d43d8b853a6b15bf2009822fc67feb2. 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/IDA662001172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb262001e9459c5b0db62286d22a793faba6e7803e69410cbc6b84fdca58b6c45. 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/IDA142308774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b7723ad4eb11cc984f2ae78b0fbdf429863309abb8d566e4930c850aba61c5. 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/IDA142316669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba199ab3b62597a110c6209b301c32ea04bf7aebc21ca1da4e069366e38f313a. 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/IDA662201552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce1199bc058c11cc64e866c99d8f6cdd766374b1d435ff8e66d3bba20033289. 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/IDA662101274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8bae788b90e79287b8a5d22c08b6ea13263df7e692958254dd210834103a11. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/IDA662101286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bea60e12120a8a84aa1845bb93f964d451b5fe4625ab8cd64b1516ab78b8757. 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/IDA661700497.