Robert Berg (April 7, 1951 – December 5, 2002) was an American jazz saxophonist. Biography Berg was born in Brooklyn, New York. Berg started his musical education at the age of six when he began s
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 0x5f1c0a9a04e5fab1a82db3c7fbe891ef48cdf8de0b5f931dacfbe40d3b45a8e1. 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/4bddf474-6f5c-490d-8178-15de2142f7f6.json and https://artists.proofprofile.net/proofs/artist/4bddf474-6f5c-490d-8178-15de2142f7f6.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 0xdf41804807c4bbb5b0b772ee6ecc8c687177797c53030bc482e67a8a744cba16. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USC4R0300315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe76453dba36be772795908097fe37fa59f897ced65efd6701a4f5f7dba6c803. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/USC4R0300323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a778d9db0dd8b036cffacf07b8f4f94ad0029a77e4fd185d730445bb9819735. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USSJ10500402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5adf0a25a635fce25bb56d65aa0a7d8bf7f35c0df78ea6624ec15490e102f3. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USSJ10500403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c1931df1cd51ebaa5e640c72cd1410258aa76cb53d4e99d11a7da78b1a5ce7. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/USSJ10500404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb933f8cde61f406b224124c5fe5f88127f2dc5d81fa50519b736c52b8aeb55d6. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USSJ10500405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4ecd134ff65968499292e55252da66297593b05c811d24af3a91a873e437d4. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USBN24900609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35944ecb2b5a7014be30e94c637d3bd699aa7317f654514162b7c6fbbdb8d167. 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/DKARS9201101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb9e70831acb9a7627739a59b121e6a60d2e35c4d6c95e509215d19217c0960. 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/DKARS9201102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00479d5c88359d664d2a2d6761bbf3cf3c3972585f6deed4dbadec80a4319c34. 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/DKARS9201103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fece73590c1a8da1bae7f7cc99b360cc37be85416dff3d4aaeb3803bf3fa110. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/DKARS9201104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f949959c0425fe6dc691ad08d7b6c902d53792cc2435c7ea7f18e05df6adf1. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DKARS9201105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608c1660959a74c99e47539facac75b2ccc0624a1a32ae4edfb8c3a30f1b439c. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DKARS8800101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54707025543807d75db7e3853c643e7cf4ce02a6c250e42b3f534ccb1e72d516. 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/DKARS8800102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b47411a7b6fab9d81dd1c91f4ce13dbbc33b654a354e8811e342872e53903e. 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/DKARS8800103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4502122ccfeb7c4c38eb62942052d0dbedf65b08d36b33a976f941b2f5eeb1. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DKARS8800104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a4eab3d7e7c66df99b6ca55cdf31e1d5564180eeff564acc482e21ce989601. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/ITC000200488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fafc882381afecf929d95207ce9c10f142a59763e940731e4c6afc59deed9b. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/ITC000200489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb5507d68888eb2e6ab2b0a28252645011aa7de20b84be0df08ba64b905fdf4. 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/ITC000200490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa47070de80a541a5a645fb820100c8a114ed9093eab8c6d622c9f2e4f73c817. 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/ITC000200493.