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 0x506c4330eb33368c8338953eb2c60d9ca26bd709bd385b08877c12493a963935. 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/9a868c24-8efc-4e8b-a361-ae6874ddb613.json and https://artists.proofprofile.net/proofs/artist/9a868c24-8efc-4e8b-a361-ae6874ddb613.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 0x4d7a6a2584f4ad64d12ddcf338756e56f2e20e9c9813db86f364835e35e3e7eb. 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/FR59R2327364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef251834566032f72b686081c62a8d47ed0107dccee8ba8b5fce747b3526aea. 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/GBMJG2412087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c82d72ee536ffb242b7aa9bb3926318d7d18c56ce9f164180d8c0fe4d643b3e. 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/GBMJG2412088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e100d9c79513f66a38bf719a2fedddd1b0a051f0a25089ce252a645c56a309. 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/GBMJG2412089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f3e3ece482af18f1eac1a79d693ef31dda60f4342cabe75b68971e1f571f8b. 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/GBMJG2329891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3ce8cd69212ded2ed76c872c729064bd6498a4d729dc6207c09849db8cdc39. 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/QZTV32361520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3c9377d153c8bde3435c0027467f9abb30d4736aa363db33bc1b43d067c28e. 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/GBMJG2317496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7247c6733b7d0e4336d78ed8adb2ee4af74042179567f41810539558b2feb304. 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/QZ5FN2359198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fb26b489ddcb1e1ce7400dcc4893dac62a0e1f64fe63ea4d439c4fffb959c6. 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/GBRKQ2206431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae34a15a363676995a90a1eeb46518d5d1d74f4781ade72a41b4db85a4de413. 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/QZ5FN2242019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9880eadf56ef57ef5d3f0e6c1f1108075dddf3a53288896993a485c7812be276. 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/QZ5FN2241992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1b54feb9d25b9623ef18eea62f8fbe5cbb9bec91c1f1b2930f5da34abaeb9d. 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/QZ5FN2224235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aad701736d1c70686f4322036a3ed970f37b73cb4e6c22051f3d34a3889a043. 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/GBWUL2124557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78fcac0469c5bf17ac2943218d9a27954790afde2b7fc91f81f4c1cd9c5548e9. 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/GBRKQ2147839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751acf38a813c08541861671be523ec43966f2cb2179735e89cf4e5155adc6aa. 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/USLZJ2187763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040838d6329b0e72cb2a5dae3040158eacbe141340263afc8988c1aa70798d8b. 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/USLZJ2111648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ae1f284fb041752830c366298e9c40e373cfc13d6233814993e1b5c8e268df. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USLZJ2111652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11e670cfddd34ee0bfd41ba1ec32cce2fa2be7c587c51420bc6f54d0aa011dc. 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/QZ5FN2123589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17331a5d88f3647af19c7329c0c1f293e3798f4e41818347bf8ea5f050304183. 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/USLZJ2084370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fdf027b024128d5b7846d58cf5d60a2abc1d8f893929eccc961f71e060118c2. 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/USLZJ2006422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2ee8d238a6bd694e08e0a72afc3330fd98bd4cf4f20b28862d0d1470808024. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZ5FN2038707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f767bd9a4fe80ccca86728949e89c1f2b53ff0cd2712d333997d66386245bb. 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/GBWUL2077711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a1375d2272033ac6f7b5349a150cfdecd305b2bc3cf3e30c1902515f673d29. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBWUL2049329.