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 0x418a23a4ee1eb8c584b11d156db2b76d8b7b22dbf6a433d0d46fa14bb139614b. 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/2aa6f19e-00f5-496d-94c6-2a185d9cfac5.json and https://artists.proofprofile.net/proofs/artist/2aa6f19e-00f5-496d-94c6-2a185d9cfac5.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 0x45bd1df11a011f7e294e5f2049b70e9737171121cd9f8d0f33e6e48c7a1e1134. 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/IDA661900970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730a7b5959c6ae0817cba95f38d50fb482ce805c71ee57a63781d1d2f8e3ebb9. 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/IDA662001071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3ae3a8dd584119b1ca6a7b8e554cc19bd06fe821ede8e0cc6f77756a86c5dd. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/IDA662001079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f81b1e6ed09a8b6e2fb9552f7bc28968276b60ea42c28c0e675a88e63ec7774. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/IDA662001174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f58fb82676788fa771440007b3948c07a0ce448d5e4e8e13fff1e20f18a373. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/IDA662101202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bdc0dee4b11e6b9cd607633f6e955dcd2218865b49891af9409df4eff1cef77. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:25:49Z), 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/IDA662301731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f58fb82676788fa771440007b3948c07a0ce448d5e4e8e13fff1e20f18a373. 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/IDA662101202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c36990d54f4e1c849507107f42c97b2d3607e4d0ce4ddb28ee8801ac241209. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/GXBAV2585095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce1199bc058c11cc64e866c99d8f6cdd766374b1d435ff8e66d3bba20033289. 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/IDA662101274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46940a7dae0d5a8eff2f5b4d84b4d4e8faa8261b94fc09b534154bb282733b22. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/IDA662101285.