Henry "Skipper" Franklin (born Henry Carl Franklin on October 1, 1940) is an American jazz double bassist. Career Franklin played on Hugh Masekela's 1968 number one single, "Grazing in the Grass,"
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 0xe458ed536c718c552546db3d4bdd380f65180609ab31ac1d983092c7b1a0f0b8. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0d06764-7ac5-472d-81d0-6c5adc57aca5.json and https://artists.proofprofile.net/proofs/artist/f0d06764-7ac5-472d-81d0-6c5adc57aca5.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 0xaee3f3ba084b8e457fc8b7271e3257419c9322f964244a5b5a18579be4f6cf3c. 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/QM6MZ2021363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fffc5904b8f8f89e6f200692830c2fe54a3ce7d7ab05cc3c4ace53ed1b512e. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:44:35Z), 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/QM6MZ2024063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd211d54b84a52e6f0f78729c15adaf1ca89d6dd2072c71ff9640c6658c3914bb. 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/QM6MZ2024065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e36a872181ba79b3debdc865d68126ec0aae1ee5fe38532982154194273318d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM9K31201608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03adca65f346a70f769f7a218140fefc89339e0455e91d4c2eb8ef1843339fd5. 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/QM9K31201609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9605839bb23b14834f3fbbf0d5a7fab8dacbaf578f26ce2c5d1ebacced43f184. 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/QM9K31201613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9722e0a22a35cdcbe4586f9323fdcc88f91ebe9bd9635b695fd729b8dd0c5515. 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/QM9K31201615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0772bd694a1dc26a73a07273829442ab3c804d5e99f6d8b1016f5d075845f7c. 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/QM9K31201655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03adca65f346a70f769f7a218140fefc89339e0455e91d4c2eb8ef1843339fd5. 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/QM9K31201609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d55780b14e20b323f31e8e0ea02c2a43c9b7fb49f9168b22a5e07d2de49701. 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/USB522437301.