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 0xb7b627b7d6f3e08a61801bcb5781985e5d8c7cca32c91b571f939c7c6b9d2285. Chain 2 (Bitcoin): anchored in block 954500 (2026-06-20T04:47:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9b089d83-10aa-46d6-9317-eab119cd3712.json and https://artists.proofprofile.net/proofs/artist/9b089d83-10aa-46d6-9317-eab119cd3712.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 0xb05c4e47d98f3860423d41b6dc7985da67e049f84c03b4e2090e7a1f8429b400. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/HKG732141739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63522c57b4731a150b8f37d18251d3d772309629fcc5abcf568024c526a991bd. 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/HKG732141740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf077c72b7eff4bf1ac45eb6fc813f2d11e5a25af08306b0c7b405a1fa7dd9b49. 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/HKG732141741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa576a03149ecb70221e099613b3a18143e5209612209e59f3ea8df0be87762c7. 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/HKG732141742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633babbaac1e96453fc488a713e59a9dd9c09fa39ff2f490d2bf628247fe71d1. 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/HKG732141743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803d5ca5527df9f662bf47a5208fc5c5b36d2aba6ba234c1a6a2b6f243e6fbd5. 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/HKG732141744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4079705b2fe5f3736e6f75662868ca769c379f776ff7a48dd5bbdb873151e2. 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/HKG732141716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ccb481aa41f7efaab4a1dd0c95abd6edd3cb67cc40acb7823301ccdfc17d9f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/HKG732141718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c0cc6af2eeb0c95e50c6aa5f0d0ef1c234e841b1ce421342066851087d0b7b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/HKG732141722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb454ddbd6eaf775fbb2590619eaf9fae6c832c7acdc0223a1724f9faa8c65e6e. 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/HKG732141723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ed62d1a0901ae31a2a4b5a61a659c9edeab2f626f0de68db36b8aef1f0534d. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/HKG732141725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787b2bf22f6c201595e17d0074656e1f3cc42692613beccfff2cf5d01c86f7f8. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/HKG732141726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1935ebe15bc1af77c50128bb1e564c3d8b50e28ef82a7d73c2372721ad9fb1de. 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/HKG732141727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed8ea2da999a1c3817c0822d633368607f6ab90eebc4b29bcf85d11cc57ba34. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/HKG732141729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604d887653a50d7a39d00833071d2731f611a5c40b995642d1e4c15c367d5472. 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/HKG732141731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47bd75d9fbb63824e89007f7df8ca3267fc71f150de4eea49421cf50f1ba1547. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/HKG732141732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59f6ba1cb7d47c0dcadb0ea89a129b5ebfab9e1b79922fa4f4635f29b2ac831. 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/HKG732141733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a586b686d28bcab83113c3f5ecadb81752ef4ef97a6362f6bd65b99cd6bb6e2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/HKG732141734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c893210f4ab6f3b178490e886b5c676c7b29c682601d6a273d9cad0c454dbf. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/HKG732141735.