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 0x49843cc32bd181751245d20e2f06c4de02838c2de56f97bff63b1640003a9087. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e3bb8a4-0ffb-42c4-9610-11a05073ed1b.json and https://artists.proofprofile.net/proofs/artist/1e3bb8a4-0ffb-42c4-9610-11a05073ed1b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
What Is Deep (Tribute to Thabo Motloang)
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 0xe01aa27052f7f64119bb655cd013781a4a3fd435d961cbbd2279b9022735cef6. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ZB9YU2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd08a0fa3ac40f9e7a9f408be94d0116c3f22a1cda9ac43f435dc0faefb7616. 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/ZB9YU2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd08a0fa3ac40f9e7a9f408be94d0116c3f22a1cda9ac43f435dc0faefb7616. 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/ZB9YU2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37f02f545c135f26872bd7896e196f82706c7eee5077dfc979f110b0b610f70. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/ZB9YU2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9d4bc520141be6d6c20f536ea2d3bb603150dddfd722c2b0597b6885daa360. 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/ZB9YU2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0047860719383694459f9b152f8f7313d288b0437de09cd80c2519b384b9619b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ZB9YU2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9968cf4fd416d58f02f30a538963029d1f00d82b2ac01a13c979989396e76bce. 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/ZB9YU2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ced8d81834979317e0aca0522e70d806e931bab75158a46b2940d3986d1ba4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ZB9YU2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a1f6d064f7b6ee244573034ebe61623ce5f3d22b0256fbb49a5237cc33401f. 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/ZB9YU2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a86b84bcfa776feec02313ee6ae07b70add877a7e002023b5af3f9087ccd267. 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/ZB9YU2400019.