thumb|LuLuCa PASAR+POINT card is a rechargeable contactless smart card ticketing system for public transport in Shizuoka, Japan, introduced by Shizuoka Railway (Shizutetsu) beginning in March 2006. T
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 0x1a67ed32e023076c8365d54f62462434d588d2954f3e7b2f57b7d93977551cb8. 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/7e87096b-b7a2-4461-afe9-45f59db71f0b.json and https://artists.proofprofile.net/proofs/artist/7e87096b-b7a2-4461-afe9-45f59db71f0b.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 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 0xed674e5be4dc31d3e033255bce29710f81ef98454cfe3b218c212da6dfcac6bc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXEDT2000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f538a029ee61b4e859d92e62ce6724ea3213a9ce14cf0eea8d5e7a57a8fbace. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMZ92071803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7fe9e62d15509010368ee555c02d38771174b2ba1339935d53a6a325871cc70. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BREDT2000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3ea41054938e69630c84492a404ec4a8b1a23ed3e710c6a16464fa4ff9df57. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/AEA3A2257737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd871539b74752bf24871a9eb42c21c7fe6c08d69cb2a6305d5a64968725c25f2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/AEA3A2224088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8477232bb726936e9d5f7ef10bcaee46dac62712d984e70cf5bf3ba48aeb2341. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AEA3A2270706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6687f2722b5b4f0bf9aa268ddc452be75b922ac0e63b22e267acbcdfad6d8f. 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/AEA3A2288851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653179cc801777a021f15907a932993ddcfdc01a56700eb7ecc2d836b0b338b3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AEA3A2262979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f28e3d3159e658bdf310a21ea586ef8f4ead2e778736492d6e3b7b880bce88f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AEA3A2295711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4e3f83bc09a4ff6759fb0ff26d48ca5b1184d190600ac603233fec4f0f08a8. 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/AEA3A2202702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc0e8dae73c226098e78af749930eb41907b6e0cfbb3f7573346c4fd6066878. 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/AEA3A2270824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecedde5d7de5b4f5f57337850b489e5a35eeefc39a5eb8e348120ece4f09639b. 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/AEA3A2256608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6dcc4601dc3011fdd544494103fd1390856340ec1a8755ac0eebb999796564. 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/AEA3A2289487.