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 0x42920da3c7aadfb33381deb1246e633d67c0bff30397d19287d5a82851626624. 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/7daa66b0-b70c-4395-b1d4-42978f8ce944.json and https://artists.proofprofile.net/proofs/artist/7daa66b0-b70c-4395-b1d4-42978f8ce944.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 0x7921246a806c75e43feaeeaee75eeb0cc4a56f863e50f0154028a36f6bdf2235. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCADX1829409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcffcce81802e058ba63f1ccdddbb9e89f6636b51845f0cd9c6b62de5063375f. 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/TCADX1829421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c52174885aa7aa71e2d0075b04ff1c18b3fdad51d9acd39b323370ea0a89e94. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US7VG2112816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a1d4b6c9a91dcafa2961db989c591c3e044945618e4f9a480ca57fe8850f34. 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/QZS7J2267180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723f5bad50017a975a3b9dc70a9dac9d67cb7e0f7f8719db51ea7d1057b5545b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZS7J2224023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245be67ca3804df1a1bdd73075d744c349dbc62980c1801e9c55e98d999dbfbf. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/QZS7J2228302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0dd5d84ef7c3191c3e60415d0fa43893419f19307e4ecc71fb6fcdae4c8be1. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZS7J2285010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03753b3604a5e1fea69025f4521eddb1c5cad43cb4066349b18402c3b584b01. 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/QZS7J2266798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c31436196cd32931ec76aa5109d946b767112ddc98664d6170949ea0a30ea4. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZS7J2222488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9fe27e2e4abe39d5eaf8090d1bab7d126650055dc57e4a88883937be87c15c. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZTBF2379359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7486896f789eb33f3026c5a099f510ea1fc3444f4a983ee3db22ad17c5a1f50. 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/QZGLS2400983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4848f52dcd1a3a0b04671cf34dfb0c85e2892fa44f98da4d70c1243a2aae46. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZGLS2400995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6c19b8af91b6ef97dbd4918b7bcc37483430544ffafb984c2c11d792d2538b. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZHNC2591841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f660bf0ae2431b31e5c2a96691a624d1337d5c3f227301e2e1572d17141e086. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNJV2574311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa3a2ec278dddfa2e35cb1806d83ec8f6887961af873713a1584c50545b022c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZS7J2571390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4388038479c67a36ea042f8dd740b1d0701d1277d9c068532b289d483ad2c18b. 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/QZTVM2275984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c57a07d3d1526bdd4bdd8a3bcbf45494c0276d6262ef244178719a40b831a8b. 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/QMDPP2101250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c57a07d3d1526bdd4bdd8a3bcbf45494c0276d6262ef244178719a40b831a8b. 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/QMDPP2101250.