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 0x96f5783d37e584c2e841a8d5909304ef3c523f514cb2ef31d436cef55bf51a46. 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/5309c855-9f74-440a-b01f-a4df3d38dd6e.json and https://artists.proofprofile.net/proofs/artist/5309c855-9f74-440a-b01f-a4df3d38dd6e.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 0xa2b952e944b30a8a86277d92f98d1bb2e8e34dcdfd5a4c3c745ebc1f5a1b9aa3. 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/QZTAW2404545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3ed67f8ea1559ad28e41a55d5326667ab9b1afa4556a7f89ba6182b42020b7. 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/QZTAW2404546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a9f1c99f13321cecb56f7a5665886e47357386c64ac22917bf89353181c658. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFYY2441688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80ad2d0a25f2c00ebe63f2ed883d914879567d5cf87fdce39d0005c5ab83849. 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/QZWFJ2309084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695b31192b3d2b7d56402583914c08d20920f2d81149830899b79d25bccbf774. 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/QZTAW2404547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c41aba9184b5f97367cf710640f414b9b4cfe308d2ded39d1bf4ee3fc17fb78. 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/QZFYY2440047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8cc1d99f3d5e9f0a4a7efbdc36de5d26272532d764e8e3549fa6d186032a13. 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/QZTAW2404548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2500b5a978db10ed0b4c2126c35a41e8f116375bf926180ff24ca7faf7ddb0f6. 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/QZTAW2404549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b68c3036d3e34ab4bade2a67ec32b3b5d75c934bbcb3b404583d985eaaac463. 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/QZTAW2404550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a9f1c99f13321cecb56f7a5665886e47357386c64ac22917bf89353181c658. 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/QZFYY2441688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e57099604e3810876e4eb667ea3b78f0005c821227e0908020a6a20a586589e. 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/QZFZ72441564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c41aba9184b5f97367cf710640f414b9b4cfe308d2ded39d1bf4ee3fc17fb78. 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/QZFYY2440047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef74e5cef172a0849f9a32d966000500a8823118d77bc8c4e21d42610575b436. 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/QZFYY2442564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80ad2d0a25f2c00ebe63f2ed883d914879567d5cf87fdce39d0005c5ab83849. 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/QZWFJ2309084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42975fdfb064534a5df37694eddf708dcdc75d16b9d9d0e343855fd7cab4e448. 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/QZFYX2341173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4932c873c2b4565832c19813e0b76ee79c6b76a3f835cc8964324341cf8118. 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/QZES82268275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3db53fa65477d6bd3a2334ef7070bc69cc12da73b504d243610cea84bcee1f6. 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/QZNWV2170264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f58391ddf5d3288eb1e387c2989579a584640e8ebb4987073aa785af61601b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWV2170265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f9bc54395d941e9a9b146c16cac0329acf773ec6b6ad10cf88a36916051405. 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/QZNWV2170266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31499fe8ec7da912aaa67152208594e4eca2ee928c38cb373a1abc9ca072af8. 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/QZNWV2170267.