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 0x67b12268a065e360b2fd9d26569ce56c3ed02c2b6b3b7de37ef3923b6be6afe8. 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/e1ceda32-00c2-42e3-b9fe-4532c85d08a4.json and https://artists.proofprofile.net/proofs/artist/e1ceda32-00c2-42e3-b9fe-4532c85d08a4.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 0x8067e04c84cd707bc6ce5a1f2eb38c11a5ff5046f9746c3e7b85064ceccb0f5c. 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/JPR562300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8067e04c84cd707bc6ce5a1f2eb38c11a5ff5046f9746c3e7b85064ceccb0f5c. 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/JPR562300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf36bec53197025111b2f91bcf859caa04fc01ad548aa7615ac8a535d26d7b7. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPR562300282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf36bec53197025111b2f91bcf859caa04fc01ad548aa7615ac8a535d26d7b7. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/JPR562300282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8067e04c84cd707bc6ce5a1f2eb38c11a5ff5046f9746c3e7b85064ceccb0f5c. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/JPR562300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfecf1299f676305bb0e030f157d3363c5842ae9bdba01b9e93659827e6c6bc. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/JPR562300339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf36bec53197025111b2f91bcf859caa04fc01ad548aa7615ac8a535d26d7b7. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/JPR562300282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfecf1299f676305bb0e030f157d3363c5842ae9bdba01b9e93659827e6c6bc. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/JPR562300339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527db5585723bde42aaea8202273c6ccf19cd92b41acd3cb86c475f896d72f04. 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/JPR562300397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010b0b28ebc0191cc18ae8a485ad0f61f66f1ce0db811857cab941b2aa9309b6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/JPR562300607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bf931737099422584b41f99f0e08195749e307823f9b2a045f8a6ae38328d8. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/JPR562400120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bf931737099422584b41f99f0e08195749e307823f9b2a045f8a6ae38328d8. 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/JPR562400120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b2819d6f536483b1f581e8654571cb12d35b2fa71772f8891f6c41856b79ba. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/JPR562400122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b2819d6f536483b1f581e8654571cb12d35b2fa71772f8891f6c41856b79ba. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/JPR562400122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1f4efdb98df8b56e7ec703377ecf6632b0970c10a03c00165dcb164fc14d6a. 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/JPZ732500281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af31b5b5f6c271ad95ccfd5a39985bbc4f25a5e8999c67179303557054ddb1b. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/JPZ732500282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1f4efdb98df8b56e7ec703377ecf6632b0970c10a03c00165dcb164fc14d6a. 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/JPZ732500281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af31b5b5f6c271ad95ccfd5a39985bbc4f25a5e8999c67179303557054ddb1b. 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/JPZ732500282.