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 0x65c4deacd8001640c6b9776cdda826cc0ccba22d1ab929901613d64487e01662. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/280a6409-c2c2-499d-a124-b8f4666381aa.json and https://artists.proofprofile.net/proofs/artist/280a6409-c2c2-499d-a124-b8f4666381aa.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 0x245e13f9e07c368b019d23d8a9ca11f2987e50b3716fa06bf6ac0eee03953165. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZNWS2475817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d520ab12561158d9a7202e770757d9217b2bd0c596b374dcf81f6af08178c76. 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/FXR752408478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa8f15f87ea8cd4f8cae9264f1fafb29b0349b0e25a9b20cf0ddddca62ebc33. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FXR752408479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd165032a0ee590316ac1bde102bc3b1e251971833540c24937f282ca72b4fb7. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/FXR752408480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd08804efff7c14c152e5195f255991cc40b01f5557d9a4cc85959a5046cee1d. 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/FXR752408482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095a56f9cf1fa6b2a715ba31e83bd1ad88209a8761beb1671362f3faaf2b841e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/FXR752408483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc239ef338b68c6792e1ff234e8967d86629791f8cf9511e7a6064156e036c106. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:02:25Z), 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/FXR752410046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa182a0a6f271ee145ba42448ea8817bbe95c4d9a4c98a8082dc655c435e584d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FXR752410078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c11650cd9e25a4682001a92ea23be9a640f6cb8d692ea7cc2b27715d0fa0323. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FXR752410079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8da809cdc06068daa6f8fc5014842b36e11d6b94c8d3421fc916eb2592c6ed8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FXR752410080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfccb3b5e08db9f9cdc86160fbfefc9bc213931f1c2d033a1a90eed578f7c2fd1. 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/FXR752410081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335b31f677e9243bfccd6bc52d72de039e2e0bf9f20b1a6549579ce2a9effbda. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:00:44Z), 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/FXR752410082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a288326d84345a43fc0a412477826adff8730aca7198d7b930302ccbeaff072. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FXR752409874.
The Great Challenges Of The Sakamoto Days (P-1)
The Great Challenges Of The Sakamoto Days (P-2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b04419a27f5d068b37a1b475ba0a2b9c64893130fd31966cf76d47f1dc7d0f. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/GXFHP2540734.