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 0x827cb5a9ab67ebd4c8f672c43ce9ab158344b2573e26e3b322c87fad47f4541f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e8cc72a-f794-4f1d-bef4-463713b33973.json and https://artists.proofprofile.net/proofs/artist/8e8cc72a-f794-4f1d-bef4-463713b33973.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Highlights From The Gondoliers & Iolanthe, Pt. 1
3. O make way for the Wise Men ! (Chorus)
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 0x87210b59899823e606c698d2c05212b7f1e6d3d560638a74bf8cb7fe4cc428ca. 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/GBF077541804.
4. In every mental lore (Scaphio, Phantis, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc072ba6f5076e30087c8c77e2b671896fca5a9fee032d7819023a482e7b3dfa4. 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/GBF077541805.
15. Oh admirable art! (Zara, Captain Fitzbattleaxe)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00477219514053670385640aa1d3f738adc3d5f55bcc32fe4542179c1795e99f. 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/GBF077541816.
Gilbert & Sullivan: The Sorcerer / The Zoo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb46f6db7ade836b298c6774580a961b073e9945781db015315533c8c8c2100. 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/GBF076641501.
The Sorcerer / Act 1: 3. When he is here, I sigh with pleasure
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17abdddceae4f4afecb15ea89aadc2152751a4cb017426b914ac9507d1e1603. 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/GBF076641504.
The Sorcerer / Act 2: 23. Oh, my voice is sad and low
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0cbc066fc300e6eef5f8a3968f79362f2fb6398fe94949c55ab48b04e7fdd3. 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/GBF076641524.
The Sorcerer / Act 1: 7. With heart and voice
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7a126b2aa12c065ce85d3a44ee7b60f60ad5118f7f6485e841eaafb973bfa0. 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/GBF076641508.
The Sorcerer / Act 1: 8. My kindly friends...Oh, happy young heart
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950bf9589cbae4483966ad341dbad5e2c390fe20010e644683a02cde17787d17. 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/GBF076641509.
The Sorcerer / Act 2: 26. Or he or I must die
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89fc69230119982942114e0e13e702dc7b6d5cce97a5f2a9e3e621c1cce2b3c. 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/GBF076641527.
The Sorcerer / Act 1: My name is John Wellington Wells
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3622ef8aa9f2dce415cf55e9e9335d8b76d8b1b49d29838233ca6805d3bf0948. 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/GBF076641515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7a344eaf7fb13d0f74093b67744ade7c7368e8bd9c0105bee317e1db5b83dc. 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/GBF077743005.
The Sorcerer / Act 1: 15. Sprites of earth and air
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e71930554021c403b67d6c45790350e0a86c68ed7e148f68b941df25d5dd73. 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/GBF076641516.
The Zoo: Once more the face I loved so well
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55457d653689755b7352b9aea26a9014de42c91edd34fbf4174d417f7db5ada. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBF077743006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09852857883830e42977c91b7398dd2a33e540345611188b34e7b08dbc98a6b. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBF077743007.
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 0xf8d1de87493a0adb53ba7e1dca581095b1b749bb26514f4e517f623a34735799. 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/GBF077743009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557aca3635d89baeb1c11cee899c6618b10fed7c2569e3c56369021bbefb626c. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBF077743013.
The Zoo: Finale: What do I see in this disguise
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc004eb358f63d6533c4ed632a0dbddb193a59c068a2d52fd9c75ecf6f44a96e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBF077743014.
Gilbert and Sullivan: Highlights from The Gondoliers and Iolanthe
Gilbert & Sullivan: The Pirates Of Penzance; Cox And Box
The Pirates of Penzance or The Slave of Duty - Version without dialogue: Overture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91f4b761e959c436a13aa51dd14c89928094bb103d51f2314433deb8e057c2e. 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/GBF075742501.
Gilbert & Sullivan: The Mikado; Trial By Jury
The Mikado / Act 1: 18. For He's Going To Marry Yum-Yum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50984dbe750bcde0b785fdb23922d901142f92baa9f89559da4675bd4cf0a4c. 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/GBF075742419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996b7c6deee4026462123bb5266f56acc937c561f671352fb5b0477f435fb8e1. 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/GBF077443103.
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: Oh, Gentlemen Listen I Pray
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b26c8c2edded5885be32d9a597168f3f5a290464b2e8cf0389f7f1a8eff120a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBF077443110.
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.
Gilbert & Sullivan - Excerpts from "HMS Pinafore" and "The Gondoliers"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581f7b94e7edb06c89ac1e406570c6778ecbb1b308060d13f93631bcac2ef288. 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/GB8XC1912695.