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 0x0524b43df4da182bc3e0ae68b2c7aad693834ce05cc7f6d87c29c076fd1b7b4b. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a6418199-bbfb-469a-a607-27939532e737.json and https://artists.proofprofile.net/proofs/artist/a6418199-bbfb-469a-a607-27939532e737.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 0x9e345fb4a644cc2e1325104d52f2044c14627818df84383312e5d06daba0baa2. 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/GBC7N1040201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d4598eb7d7cf448e4cc82059378b01c16fd69dd85c811624e9334ae3a24da2. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/GBC7N1040203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb667a4d9f6d11d0dcd394689fe82c92f8ed0ff14caf1f619f3927fd41cbf0bf3. 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/GBC7N1040204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc28075090bdaa2d2ebf1afb288787c5912b0be37b1c5f45d2633f748f89a6a6. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T20:25:40Z), 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/GBC7N1040205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2202554950357da4a721c35f8dc01d50abd897dd5b532b02ccb2b525e956f18. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/GBC7N1040206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf0cabccc47f67a87216222fca97870495b7420eacfe3f1897b3f2e66a07158. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBC7N1040207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa799cbc88b87c960b3f4d1a703e76afe79c6ae99500dde001608bc396ceabc9d. 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/GBC7N1040219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5edf41f233623ee7a836ccf344c2d506ffc324b00cd1d4da9a404ccf1b89c5dc. 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/GBC7N1040221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5c52877548fc7b7a81b8a329f22d40beebb0bccdb91b39552197e65bea61c8. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GBC7N1040209.
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 0x34824d12238d147eda525dab0cf06b695625000b4b5d6464d41e5a91e28da0f4. 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/GBC7N1040210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a10fdcf4e7ac33e83f1ca5fb294e0e338684a2b30d86b2b28b42105276bd40. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/GBC7N1040212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc344634f4d7d462878f32cf7472ae817c22ab9bd4c097ebd656249fce5197a7. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBC7N1040214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33586d2793019c45aeb05f37da19d80db298ae18c1221235b297417f2905daab. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GBC7N1040216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09db2fb18f34dd2a2f2898a141445707326252d3fb9acc450c3674026e6593da. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/GBC7N1040217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c44f79afa759c3473f1978fc57dd1745fdaf290fdbbb6401006bf6f45bcfda5. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GBC7N1040223.