thumb|right|Jones in 1962 Peggy Ann Jones (22 January 1939 – 24 November 2024) was an English opera singer and actress, best known for her performances in the mezzo-soprano roles of the Savoy operas
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 0xbedace1cd1f0679b8fb366f0ead51c41695b06d9e0c7ec2b2f4c9a1d6c4fa0a3. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f8aa7814-31cd-47d2-b4d9-c0ad8d5cc66f.json and https://artists.proofprofile.net/proofs/artist/f8aa7814-31cd-47d2-b4d9-c0ad8d5cc66f.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
The Mikado / Act 1: 10. Three little maids from school are we
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 0x56867a24f837f405ced483ccf091395ea10dc88f95d3b76b1246cf3e29044869. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077340111 — a six-check JSON result.
The Mikado / Act 2: 30. The flowers that bloom in the spring, tra-la
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695cf37d9a0ec1e4985eb4538c38f4fafb80504678dc086cd61b14475c5d4b3a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077340131 — a six-check JSON result.
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 957050 (2026-07-07T14:41:13Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077340137 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56867a24f837f405ced483ccf091395ea10dc88f95d3b76b1246cf3e29044869. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077340111 — a six-check JSON result.
The Mikado / Act 1: 11. So Please You, Sir, We Much Regret
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87d17b0b107010f05cdc7008e7bde732f90806d081594990b04b2ab74a8e5ad. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077340112 — a six-check JSON result.
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 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077340116 — a six-check JSON result.
The Mikado / Act 1: 17. Oh fool, that flee-est My hallow'd joys!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543928bc77736580edb5669a720de8c9de7e75222e9d9c87a18ddedbce59fcba. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077340118 — a six-check JSON result.
The Mikado / Act 1: 18. For he's going to marry Yum-Yum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077702188592e126a15e3bfff37a31dc950da788785b0799ed8855d3b19704b4. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077340119 — a six-check JSON result.
The Mikado / Act 2: 21. Braid the raven hair, Weave the supple tresses
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffef2a2dcac100b69fe372e7bc1cedef00724314a6c93cbfbfe98d555e6046e1. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077340122 — a six-check JSON result.
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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077340124 — a six-check JSON result.
The Mikado / Act 2: 28. The criminal cried as he dropp'd him down
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6689cd2f448bf92fe9e0e894773adec4fda5eef34b20b190ca3dd7259ffc3d3. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077340129 — a six-check JSON result.
The Mikado / Act 2: 29. See how the fates their gifts allot
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e45f7266c372bdfa336f2edfe770a3a62e5c7827bf74ee5175010884e35b96. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077340130 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695cf37d9a0ec1e4985eb4538c38f4fafb80504678dc086cd61b14475c5d4b3a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077340131 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51a903dbb1a501dc2519bb7005d529444e62c19dcbbf813c9bafabcdd4844da. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077340137 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56867a24f837f405ced483ccf091395ea10dc88f95d3b76b1246cf3e29044869. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077340111 — a six-check JSON result.
The Mikado or The Town of Titipu / Act 1: 10. Three little maids from school are we
Gilbert & Sullivan: Princess Ida; Gilbert & Sullivan Spectacular
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10932595fd2412f5a0495a089724bedeaa0071c5d84b68904b9c11666ebe950. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076511710 — a six-check JSON result.
The Mikado, Act I: No. 10, Three Little Maids from School Are We
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10932595fd2412f5a0495a089724bedeaa0071c5d84b68904b9c11666ebe950. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076511710 — a six-check JSON result.