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 0xd16e3637d2825e792e966fd9393df91e1f120cefd94342aa1417bf2653badce2. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/718c3534-7c7f-4699-a0bc-17c6c445c2e2.json and https://artists.proofprofile.net/proofs/artist/718c3534-7c7f-4699-a0bc-17c6c445c2e2.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 0xbcaa0d646287fafc814486d6e0d72fa41a5b4225c68ff2041778914b6aea3dd4. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/DGA0T2462180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426e60c3cffb5fc125b8dab9f6243fdb10da73c00c1699dbb07aeae7886dade1. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR2X42507721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcaa0d646287fafc814486d6e0d72fa41a5b4225c68ff2041778914b6aea3dd4. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/DGA0T2462180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8f78a03f1662b9153fb1d94a8ffe199e439760e03e461ac270c99e85010576. 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/FR2X42507723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e9683845aced0d17e725da8f9b870156ad4087cda02790bc50e5800863e9e7. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/FR2X42507724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffaeb6af43e05ff61e70d82610aacaea9cb1abc95977eca97c9896ef2ce33298. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR2X42507725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e235ec91ec1d4cfcc7299db275ec076994d9664997f3252d505d36cc50a44e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FR2X42507726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7364af92984154b68502ea5e12624ea6e98dea13440982a6056f29be5befbf55. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:18:55Z), 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/FR2X42507727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a635de558a6e7669bb7badac7878e0ca07c20d9d3873627cbea015dc3e2bba. 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/FR2X42507728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5404244d4e259886c44fca8a42e99f26c4070e2bd664dc266816bac6e0c8b6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR2X42507729.