thumb|Statue of Bobby Holcomb by sculptor Evrard Chaussoy Bobby Holcomb (1947–1991) was an artist and musician who wrote popular Polynesian tunes. Biography Bobby Holcomb was born in 1947 in Honol
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 0x065e608609dab4634f22d4e8bdc6232cbd5423e7183a16e68ba78b83c5b081cf. 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/ae994475-43a4-42fc-9da0-29c29dae0c03.json and https://artists.proofprofile.net/proofs/artist/ae994475-43a4-42fc-9da0-29c29dae0c03.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 0x1981f529af52d949fb0707fb44bb3918dfc2a51e14e4fd656cea3094c95a8888. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CH4196580708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb32351bb20b5fa78af368bd7275ef91af138c2ce6576db84c23eb01940684a8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CH4196580710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1950ba791689f52704b30d94b711c2efb6a4cf1e05ce05941de84e7be8aef78c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CH4196580711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ff5f57c448db3f8e3fda4f3db1828ad1c8b29f85cf34c41097a82b68d59d5e. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/CH4196580715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa60727f8ece5d58c8c4636b3bcac11353fe39d40e8f8af11919822f747b488b. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/CH4196581446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8816e249f2f55c4e4cff6300e05a951cb8ec7d9f3bf230b9675f2de9cd03c3f6. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/CH4196580613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530f6fa97cb36c11610b0b9dfd8d1494a7c333dc8b42443ada6fd82ec2d4c6be. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CH4196580614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e66bc8e73f56d819d69dd8a558e7609555ab9f8dd46d028865cd9c9cd2a1acf. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/CH4196580615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf756a2bbeadb2582fdb58cfcef81c6599f2fcae6046618b6d79b6e089a74faa9. 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/CH4196580616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46505856c3fe3922fe1b95525b2ac7773b2906d2bd1d93146974fdb8a2616ebe. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/CH6541662462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf898818fb7beb8ea2bb2192d014b0282abf5359980b5f87356dcf1905db4bc8f. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/CH6541662463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a24c6b15fa6035a997d12b0b39bbe7d6afea5b89fc1ebbb4f0c6b355cc6d08. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/CH6541662468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9031f60dd0f105f2e77056151e67bd74bfe881c2950689c148d74cbc190fc30f. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/CH6541662470.