thumb|right|upright=1.5|Rayner as Captain Corcoran in H.M.S. Pinafore alongside Pamela Field as Josephine, 1973 Michael Rayner (6 December 1932 – 13 July 2015)Mackie, David. "Obituaries: Michael Rayn
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 0xc06577631fe6a313f576fd9552b93e5f710b59348166b314a357c37f21120c32. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1196f7ae-9e23-47c2-bd0b-4bf07c7bdfde.json and https://artists.proofprofile.net/proofs/artist/1196f7ae-9e23-47c2-bd0b-4bf07c7bdfde.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Gilbert & Sullivan: The Mikado; Trial By Jury
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 0x81f060d147045f4c603bf4f9efc6c3459acb11b8b6b6eb37d04bfe122cfe732e. 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/GBF077443106.
Trial by Jury: May It Please You My Lud!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25871f3c75224e6ff5dfbad49013d8789b9eb4cdcf165c8efe1a86d058f59a83. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBF077443108.
Trial by Jury: That Seems A Reasonable Proposition
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39da118423d7f99260cefed59e71f7e83948c1db4b4623deea162cd980f05966. 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/GBF077443111.
The Mikado / Act 2: 36. For he's gone and married Yum-Yum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51a903dbb1a501dc2519bb7005d529444e62c19dcbbf813c9bafabcdd4844da. 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/GBF077340137.
The Mikado / Act 1: 4. Our great Mikado, virtuous man
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097ba915dd259444b7c4d80afe8fb439636935bf173abe4517a52765d1825a4e. 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/GBF077340105.
The Mikado / Act 1: 5. Young man, despair
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef32e47f44d69f803fe3d500f0121ba29e52a5f30c6915c774c487985b3e1365. 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/GBF077340106.
The Mikado / Act 1: 13. I am so proud, If I allowed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3185275b3878679073d5c6ff06c5ca7513708c5f1429c6520ee29ee1874ebf3. 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/GBF077340114.
The Mikado / Act 1: 15. The threaten'd cloud has pass'd away
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3906c8f3f2524201bb007c54d5309a531a3b0fc2b22a9a48ea97ecbb6da2c6. 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/GBF077340116.
The Mikado / Act 2: 23. Brightly dawns our wedding day
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9ecfbf07c6eb0969aec4e4a0bb84868a6b127eeb6eef7df305718c9aee8444. 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/GBF077340124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51a903dbb1a501dc2519bb7005d529444e62c19dcbbf813c9bafabcdd4844da. 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/GBF077340137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c505be5ee16eda990914b598edbffd2e0cf42046e78a523f812056da9b876dc. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBF077443112.
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 0x4bb7e1d26457e7f1137613302e4718df452f1531e4c9b512a3aa8d09149c4ee4. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBF077541829.