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 0x1ae331dead769cdd8f93e8949056615a881f3a4b6644002adf23b0d92bc6b7dc. 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/9dee2be4-0c4d-451a-9670-f047c1e0ed61.json and https://artists.proofprofile.net/proofs/artist/9dee2be4-0c4d-451a-9670-f047c1e0ed61.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 0x77dd25f51f692b631a2b89efed1642fdae66f46ad44100d50ea35a8f81a4fddb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWDD2262109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838f97c9ef7c0d414f16cb141794c2c7840a8a400466d04411e716e5dfe5a051. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXZYA2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9709e991362a26ffd7263142bfede3cb77bb4b4ec01d969e9ae4772c8be12ec. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BXZYA2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361b266f6535d565d82314f9e3cb44fc3d40570f5f6f69b0f9eed40d1cec3a6e. 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/BXZYA2400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5308392456cc23652267d50c2e876141b502adc554ec8272182a55b2799bc51. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXZYA2400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43bdb732af5deca2544f120ef88d6fe5faa7f129af709002ef2f86d0644b59b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BXZYA2400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1f011a8167f3a91297355ff37103e0c08817269bc8c202302fb91d4bb980e5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXZYA2400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43bdb732af5deca2544f120ef88d6fe5faa7f129af709002ef2f86d0644b59b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BXZYA2400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490f57dfba4359dafd7c7d4db6e2c442543dd80a899dd53e36f23b8feccc1c6d. 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/QZTRX2498138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942ba852275cac8d35d5d1655a2adab46f9f22d9df32192cefcb200caca80a30. 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/QZZEC2311371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c146a04af87f1aefd86a8bab3cd3d4757a7bc51df48020a617210ed96e7e675. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZWDE2397748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c255262a9be755fa0c0451a004d549fbfce727574e389c7f9287ad97a5d337. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZ5FN2417776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bee6d9eac87d608068986ab4da7f8a689ba29268c4835ff5e405e1a6207654. 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/QZZEB2475991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210d60a4acede7c5955d2b8eac5a273cee27b678c28ea48f4629f4f526cdc537. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZZEB2340207.