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 0x90c23fb9408a5b1c2a1a5580ce5e1c5c59ab97ecfc64031d504f86af894ebbbe. 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/ce5b0483-62b2-413b-b3f5-f328098d1ecd.json and https://artists.proofprofile.net/proofs/artist/ce5b0483-62b2-413b-b3f5-f328098d1ecd.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 0xc9f040eb01f1cb55bb27d88abeb299dbe4b58603e57971de5b9a220212a96fcd. Chain 2 (Bitcoin): anchored in block 956426 (2026-07-03T01:37:49Z), 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/USYBL1901812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75179517b077e81d1e214fabe9be9a5f8dc4e0fe56ca34e1cb2e5ab5beecfa8d. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/USYBL1901815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4567f1be97f8ef17e3965d4d5950cc17face8530bb5e1b0aea13c6f7da9d3b. 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/USYBL2002051.
Nana (Like A Star Made For Me) - Julianna Barwick remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1895db93d043c7580bbddaaec6bec94b5228a82fc72cc1dc3f7cec801b082d3. 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/USYBL2100701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64a9f7734150a5a9b6f7ac0d0d42f99d7bf97e284e86ba6495b82a5b110fe08. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USYBL2100700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4567f1be97f8ef17e3965d4d5950cc17face8530bb5e1b0aea13c6f7da9d3b. 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/USYBL2002051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976ef6d9976f15c893f4712203ba48b89c088f054c1c9a1a9c31673373df4a7a. 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/USYBL2100702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f14a8c1b495350e290a9e336a66b42fa326f59ce5ada4a75212d2699ce4c5b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USYBL2201768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e74730b14abd0b15fc7e533b32328b6da7e874578f101a572d6cd7763f2c1b5. 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/SE5AJ2202525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd7612be7c0fbd7ef969832dd505e0f5df7676f200654c7d84f04175e7be85b. 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/SE5AJ2001043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69a27f27ac6c0424d789f93681175d761c2442278ed2a10dc54bef4f3b65a08. 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/SE5AJ2201923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27df542616c564e041d4fc0eae55f64f09dd2b27ffa4ad8b0f76e527592e7cf. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QZDA52257608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc35cd0474470e3acc331ce465ef06805edd6819c311ae72d377ea27d4f58c8a. 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/SE5AJ1600230.
A Little Night Music: Aural Apparitions from the Geographic North
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d5fa43bc414267e7b544925aaa2579772e821a9731778f65f549035d672658. 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/USA2P2034549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498c100a327aba5e3f91c5801e668ec4b63f1c9a7e3b0f4fff8646c8471491ff. 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/USA2P2034557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d2dcbe08398f4ba93651bf2e656af0a33cf0a7fab6bd27c927b5be0571b91f. 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/DEX261601434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738926629c4486f580382b6649f723fbc453d880915be1124f1687c1c2f5b816. 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/FRT092100014.