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 0x7af233dc089cb4b279276cb936958217150a6fe9bcb0d7ea1ff3d97650e59332. 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/afb58ed1-888a-40f5-a339-3d8f8bd6f207.json and https://artists.proofprofile.net/proofs/artist/afb58ed1-888a-40f5-a339-3d8f8bd6f207.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 0xdba5e31d3292475fba359995673f39881508bdad4c21e89a1ecf8c45a0d5c930. 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/FISX71900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea974339fc9fab5f764b9860be561024c179ee8dbd5682af63b198a73bf0d34. 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/FISX71900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1fb422e65912fd71b2b0e01012f6e097b243c5d64761061492365be1f3daf4. 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/FISX71900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a27eab38dcee681ed92dd8061cbe853d6cc3b34c8aa9c0987b46f10122bc38. 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/FISX71900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1f424ca5864e1bb3f0fd4fce71e8c3c373bb61e09fc4b66d1a967b5d02a445. 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/FISX71900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02088d3b04557812347677f67c11153d1cc3546e13f8e0d2e53bf564548bff87. 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/FISX71900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85569c5309985a36f36e2f168234782ee39fdd23b21c7845ca8fb4d76e233503. 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/FISX71900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c96a2801843c8b33c0ed4f536e0f93d4b289942afceb2c2a6ace8f7321b14f. 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/FISX71900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6890a9585dbcf33cf1f44654a6ade6d8c8d58e1b810768c6b18a955b094bac05. 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/FISX71900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244b5e51e13ca82651aa12e3521379513e9265806adb5cc927ecbf99198e9d84. 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/FISX71900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5578a0e22173bd60dcfc34089abe3d027892c30c88dbd3eab19094937c2db805. 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/FISX71900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54377798af79a7d6d7db5694271826d3b83cfbaddc633b425cd581058e11f93b. 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/FISX71900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28be1ea579a20c98c8c6ba4e4b6eac0837f3f89e32ca75feae6a660acf80a034. 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/USY282304801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a561553b248aea1933f952901be2c2f78c8a711d78f81f06ad9ba1a016abf0. 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/USY282304799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee093e7f29b25370c82e43a7ef6b28df19891751212bb0407064e5cdc6c7669a. 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/USY282304800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143017f3282252a0f47700a53c85533195105b92642f26a7f59e136a2b8151ab. 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/USY282304802.