thumb|260px|Enryaku-ji, the head temple of Tendai at Mount Hiei , also known as the Tendai Dharma Flower School (天台法華宗, Tendai hokke shū, sometimes just Hokkeshū), is a Mahāyāna Buddhist tradition wi
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 0x7aa52a115431575f92c9149ea8786996dda7431d75a84320a05c0c2da53e80f5. 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/029b5f91-1987-4857-bcf8-c57d503c88df.json and https://artists.proofprofile.net/proofs/artist/029b5f91-1987-4857-bcf8-c57d503c88df.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 0x97a5c28c0a13b6a7bde8926db09b823ecf9b4098489e2d5fadcf8270c40773d4. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/GBUM72106363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973f29356285aac91c9d20531a22accb008141234e5735ca1ac1fecc98b97dc5. 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/GBUM72301681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27ec57c95121210f6c25130624405bca9b19e9e9de7b3c620f09a5121d7cdcd. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:37:15Z), 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/GBUM72301680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefcd8c9631a6982e8ee5ed420bc9276ecf9c9a7107875b03bad8472b526662a9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBUM72305500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a858058850f514758350983233f1a65524b493cd67845f498ad865da03f46c3. 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/GBUM72305499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b1a2e637f35d9ade21a3b5fa83843e6561a5a394d28d6a96ba0f5e95557a93. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/GBUM72401003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80073edfcc4cbc8d2b404c558e7ca530bd2b32a2dea534bd4b641c4edfef4490. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/GBUM72402859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f86f993dcb2afa9cdc5715d177332b23d21a0485c7cce3875c9d70bd36ffd0. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/GBUM72403603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ecd188b98c261319cb5e8484504f844594f82738791cfab2e01f8b6e6a399d. 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/GBUM72204539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab21cb2df5b7c57b77b8eb7d71299479f74a6fd3b96a385bcab929e11175aaf. 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/QMDA62429056.