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 0xd94a1bf56b9a55786e7cf3a8ee902fc78f4a1f432fd2a506916a0583fc59361d. 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/1e8f1c45-0578-4d91-8bf3-4f512bd19666.json and https://artists.proofprofile.net/proofs/artist/1e8f1c45-0578-4d91-8bf3-4f512bd19666.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 0xfd30a5761be6e7823f5c71f4a0abfe8a98d9539e8b905fe343fe65fbfb187d99. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRKO12202015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbc72248d9a2ebbf406819852664fe25dc58ae52d7b6abead372066c3fa6569. 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/BCK9F2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6e8f38ef6ab5697ae17a0ecedb4620ef6ee8d2ea104c1feb6b918538ad3e7d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BRKO12300084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14bc5b2ec90ac612bc8de6b88b24fd44c75826d44eb2f8316b541a6589cc0cd. 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/BRKO12202013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98575567582b8ebb7c3b4e759db54f60e81f9f92c2d88f137b92fc0445d9194. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/BCK9F2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb433ff8ba085c6ed5f191422cdac8afaba644bf6170a1d793343f38541be75. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BCK9F2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f58b98853a823b1540dcb88741e906de9ad90df572bdd8a6340a7c016308b39. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/BCK9F2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d19d2c419021d24c08d0cce30326f800ea49ec326dba62a01c757698483dac. 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/BCK9F2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73dfd80be4727fbc5784b8913cf43a80a63ccd86e039a28f58d37bd7e0fe9d7. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BCK9F2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1fcbf4dfbd410538a1b72798787eb28dae9e1d92624424100fe5cf88a5d72e8. 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/BCK9F2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1941b3219018f7cfee7ecbd28bc6631fd740b00f18af1d32f9709ffdbdbe19. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/BRKO12202057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06728e6f605d1c9ec898c57f458aa69a00fdc628ce49befef3662ea306b0f722. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BRKO12202055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257ef4739706f20d65ece23e2417f447439e6f5a0cc5147f9a594de71de01b9f. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/BRKO12202027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb079a14143065c52b686cfcce0c1825f7300e7cf46d2fd7c30f1fd6592fcc1. 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/BRKO12202029.