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 0x309e6f2d2bc01614f29daa450d09f2d73a0831f8fcd19be5e3621e1eae4f46c0. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0006ed3b-bf58-4324-a60e-7dae23f4c2a6.json and https://artists.proofprofile.net/proofs/artist/0006ed3b-bf58-4324-a60e-7dae23f4c2a6.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 0x3c295fa513e8ff1189e008276be440d4b144e352f5066ffaba0594eada03b6d0. 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/FITXD2300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c226537e0681183dda20c68363d254d5efc72dc4b13633914db473321e8368. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FITXD2300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fb8fbc7328445cfc28f334d065994e06b31fa83f645f54fd944932bb61ef23. 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/FITXD2300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b3c9522588562cda8f78fbfb7fe8abfbba390caa0a76b0af97c07f3b46192f. 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/FITXD2200142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e76f2a23f6d7b8612e919ab16cbe3d440dfeddc670251352afd4d4d57943928. 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/FITXD2200138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51601e1869cf31ee37e851f897600e2884d5bc982648ea848711fae6fd2dbbc. 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/FITXD2200262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65958ec2b641337cef9dcd38223c69bb1e3eebc892fd8a24f318c972def94c4b. 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/FITXD2300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cc572d12cfb563b7e158c5898a8e418e3d1db9cc655675d487e0af1245d67d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FITXD2300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8919670f88f28782b21f33a62afe1888f76d0e4eba03813740b38f209f50030a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FITXD2300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8918b64bc0daf04dad6395b3c4da9e9d9d96972aae2b062a5666a4c7b4aabe7f. 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/FITXD2200214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c6d753ceb85e54e41bd079a3dd0fcace208ae986f151fec08531179a025cb0. 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/FITXD2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a6442707e77f41ae83e0a4f87e46d0c5763b66a1dbace9eebe15eed375feca. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/FIPEB2400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd188beec148f592a804e66ba3f3a19b180a33cc3916c9123c30a47fa2c46da. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FIPEB2500045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93aa755e6843b826366ec91505a323b59ade41d2857fc458a7ab1a9c637b7809. 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/FIBAR2400525.