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 0x211101a2b981b53dee4d7e8005517a30996fb22e878c33a8ef4c9065e5ed71df. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/498af490-c081-4771-b0f5-6ee2f8991b76.json and https://artists.proofprofile.net/proofs/artist/498af490-c081-4771-b0f5-6ee2f8991b76.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 0x2142c9c90a95969ec85b983a53c8f4d2a557c74f20fd16c770b27c8d6d83c4f5. 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/GBCFB2200704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829a56434de41dd84f6c6205b38c221f65d7462928ab697af748e143e68204bd. 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/GBCFB2000357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59bd8b2f69c93fa858dff1adbf1b314faa7219f76c94ee29bc9531d31938ca1b. 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/GBCFB2000362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b7d8b93a00eb94793464eb246569087290d032a6b8f104199a9a7b4de3d179. 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/GBCFB2000356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb2a3405c5b0219c1db900a28dfe25efc8b273ce8192743ec7e44b78d070ed4. 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/GBKQU2448565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f47f33192fad4df1fa89d28e29601285b8f0953c5d643d9f22eab1adfa82fb. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/GBKQU2448573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9fb9c2a891c2cd415bad84c810a8c43a4b90cb8ced897b1fae66e75f92c9497. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBKQU2448575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae688b2ed0d2595638be6deddf1b996d22c50090285624b70219f454e9039907. 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/GBKQU2377754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb2a3405c5b0219c1db900a28dfe25efc8b273ce8192743ec7e44b78d070ed4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKQU2448565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30c7bddbb14bbef17cd31a43e84322d939ba9afd58bcafe98a5794d7e0682e0. 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/GBQLP1901330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd6d933895df53c00d50c140258bfd970ce207f1a2c4d7e9d591b9fe7f1ac0a. 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/GBQLP1901332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e5968de77a12a740e842ca5c4e06375f49bf1cdacdd9ff5d01ca2f3f4dbdef. 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/GBQLP1901334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9957be42307ba7cc82b3f38d1b991ff257f27993b0bb2cf559bf6753dc3914d. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GBQLP1901335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a86f28ed7f9d0ea3ce6d3391f879c9f8d6539a83a98a829c3b14ca44b28e2d. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/FR6V82007072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4689b7d84bd175738479533a8201fa76551d3e810855b9da29881bab66f069. 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/GBEXH2100155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0352bcc74a422135c3ceab1a690528c401b869796935cca1c0fad34d5749759c. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GBHLW1600353.