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 0xa61b968bb779aa3bceb83af24f5278d79f07882d8f5a09993bf80b15ac57bb38. 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/94e8f012-319f-4123-a6dc-9d91328ba17f.json and https://artists.proofprofile.net/proofs/artist/94e8f012-319f-4123-a6dc-9d91328ba17f.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 0xb1e31852c7f697a99f83a4af13ba31a698828cf7fa8bf25dcc0f7174599ed386. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/UYM121702292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05accf7c512b4fc60ef14f45af11eb1452cf1ec003f8a4220dbadc8339b05870. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:23:09Z), 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/UYM121702293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11a9f7006e23d77d0033e0923614e5cab18a334eb8dd92a3abb15a0d2df5758. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/UYM121702294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0194c6047894c9b1bdc1e36b3563f944acfc83aa917401bf90a65c3140377f. 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/UYM121702297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669085fe9774e05dc5d5a6bce8ae7b6c595b4017e0f2c760c52349ba524e77ff. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/UYM121705113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9cf847ab935b1b2232ee58c8d105004581ac7323a6d362dec4ee2bbd0270063. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/UYM121903554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686c8d1ed8626e921e7794ae545bdf1f22bf902886f24f88dcfdc94b5893675a. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/UYM121903558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18b03b980c42155195c8c72cdae4e9cde8758b763e52c55e27c2e6152f16d50. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:33:01Z), 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/UYM121903161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa976b732174ef98405c0b1d672428dad105ea87edec53d930a053e4ab8d1a52f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:55:51Z), 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/UYM121903180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb322143de161bcdc6e3d3cf7b4dbca25cf41aca7c2b6c39710b4e961a52a2ca. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/UYM122002286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10819ad24f00fed44cff9de86e3918624c0685ff1f81175f6a3c3da4748de3e9. 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/UYM121903199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9e575fcc8b96de8fc24047687056f513caba386a963f8e2d7a554f20723cf4. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/UYM122200032.