400px|thumb|Vicente Archer Nasjonal Jazzscene 2019 (212506) Vicente Archer (born in Woodstock, New York ) is an American jazz bassist, composer and bandleader having performed with John Scofield, Nic
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 0x04dcd3405f47f14927bd451e162849b46d2df26aa17d18cbb393bec6d4ae1b16. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c52bf05-0a2e-43da-a682-2113099be9c6.json and https://artists.proofprofile.net/proofs/artist/2c52bf05-0a2e-43da-a682-2113099be9c6.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 0xcf4d97a81d0402f4e764f0f571b7b6cd36e0fc60ec89c0f596a38e0415d5611e. 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/QM4TW2399802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc615ed4e1192ca8300219347fbbccc233bd9f8f00c8555a383e2d07ee1d686dd. 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/QM4TW2399795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7cfb4934d1d488585a5329721599ede3213f134d46ea51621769556c24af51c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:08:22Z), 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/QM4TW2399796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa544fab5733bf1f2c91253f0558a9c282450a07e02d935033decbe0665960748. 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/QM4TW2399798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c631799e21f4ebe8bdadb3f9be06f64f697e6b66e5743ef7366e7c372d869b. 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/QM4TW2399799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3738489dc6b611342a238403326206cb46cda61e8d18e7abd4eead9a0dd09be. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM4TW2399800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4d97a81d0402f4e764f0f571b7b6cd36e0fc60ec89c0f596a38e0415d5611e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM4TW2399802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4464f4935d84b6edf82c20dc7c490c9bf9af01d560da3a227e10d8d8c428dba8. 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/QM4TW2399803.
It Takes Two To Know One - Alternate Take
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691b2a754f61f8f333e61f5225776e9c4fa9c7ad91fb16903ab58c1c3e3cbea0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM4TW2399804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f43a96f5f426a26eeac7136320f6a1cd24e1cea47e68bde68647d5e4aa0c227. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QM4TW2399797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86227bffe19abd267ae6b1d956dde6ff5f4a4dc69c9dadee00721a93dfb74027. 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/NLGZ20902665.