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 0x099ab64e546170ab0d1ee2c2dfae7a6216b1a7f26fb86607a9b4bb50c2c63aaf. 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/ae20a5cf-acad-46c5-85c8-168be4719afa.json and https://artists.proofprofile.net/proofs/artist/ae20a5cf-acad-46c5-85c8-168be4719afa.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 0x7e34a5f5cce58e39c0c86796a130c01041a5e15b04a89f365f7c0a220a55abc3. 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/BCE7P2200624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aafac6390bbfa93f6023e80f29bff548a42f2612876e371761e5144af4bdda9. 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/BX4IU2509142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014407f022159fe4f09eb3fd3d72a63abd08353d80ebef7646a8ef1defb7b686. 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/BKF442400147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e011b72679246b71d8add83504c89859c49c309e003b84210c3306d1e4f01a5. 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/BKF442400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc104ee73362f5e805ba81b3bac8fecfa522e339ba9643f2ee97dd337fe343a9b. 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/BKF442400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b71b111aa6ad1c82259b53eab1a38714a0ef08a381ee886c79e893cda71004. 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/BKF442400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb27b8591add77c47386c3fe6546881f46fa18b3ace8e5905edabd13b2d948b. 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/BCE7P2300324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e7f1ee61f5b1e22b7b17c362dcf39d5e1d0f760ab0f59bffa73982a401206c. 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/BKF442400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff03db4045dce4ca57bae95b44b168d3c93efa5a196de77eea5f73fadfabb972. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZW9M2311749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8f7d3176205da83f04371f4541e4e013d9e2ad383e3494d9207fbf2242df2c. 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/BCE7P2300327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaeafca64f32d543be92bb46cf08d9760eb08dd1e58db22852a6bf164c395198. 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/QZZ8A2430584.