thumb|right|Gulliver discovers Laputa, the flying island (illustration by J. J. Grandville) thumb|right|The Queen of Laputa, from a French edition of Gulliver's Travels (1850s) Laputa is a flying is
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 0x3d449303336aca2a1a7d677c8fbe0db7ea78726c9c5b7b968528e0c05deb0f79. 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/956b0a51-3a74-448c-8b1e-8b491dac2a67.json and https://artists.proofprofile.net/proofs/artist/956b0a51-3a74-448c-8b1e-8b491dac2a67.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 0xf80cb384bf7e5be399d3431f10107faf5fc25fd6427276c2eca2fde300ee25fe. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/JPTO09823040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d696460f99a04f079ca01f0a4b7c3949d57d5410ba2a77d95c245f157b8ac9. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/JPTO09823050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c601072288bc0301a9d942a557785326c2c8270bc87ec3afd327284539216fb. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/JPTO09823160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f297b7fa1851b926d4fcf5502aaa56e4e4db72f3fbfbd1e599f75e42bb9698. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:03:25Z), 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/JPTO09624950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7c47088447d798111be026f95209faf8254a66f9c94e94bc6c26855fb64359. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/JPTO09710530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd742db724420f92a47ae9d8b7dbb23593970f79985761b46b572f5a3ecc13047. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/JPTO09710540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d416defe75988ceed1ce17344c97495b4b16c45efc0bd357b5e74129f825f76. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPTO09807470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533980e4003591a6af54d6a2c9339003df7aa2d983c284d8c81b362042b39997. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/JPTO09907340.
Laputa Coupling Collection + ***k [1996-1999 singles]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e84322d4d48e147da5731088d8e20a40e88a72c2371fd57c7b0f4aae9d4b392. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/JPTO09724410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085ac76b8d1d4fda6ce0575b439dcb5fce5b5babca1b047b056c3d212939179f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPCR00007450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244901acc2b0fcc15579a9b49dcbd8fc55dd61b3082cb4b4b3c7310d9cba3081. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/JPCR00007470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795c6072d45c31e69ce7091a69dbd4db824dd4690b6146e61e77f646a6784ca9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPCR00012290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ad1280a12c161019b9b3a432318e62d20c9982df46592a8d433cde1e0f7359. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/JPCR00201030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816fd8eb3a70194e82fd547ffb37d4f44f2d0e9062ab2fa5eb0647dcdb71f65a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/JPCR00300850.