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 0x5be9f58fa09ba409893e2ebf8f3043dbf0d2a4f1e1dd1e0d82654eb26765a87d. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bb291f29-02c7-4e29-8fe2-56d03fdcd32d.json and https://artists.proofprofile.net/proofs/artist/bb291f29-02c7-4e29-8fe2-56d03fdcd32d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
E.A.S.T. (Everywhere's a Soldiers Territory)
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 0xbec6c732bb257121baa08a3facf649cc1f3608a1c4013ab680450a0d515e0577. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/USDY41936700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0eb3cbf81c1504ac8064986d0c38d6ec96d23b3270c8a5a11680a253fb554c. 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/USUYG1286239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea6fb003351044d7ac8753a9cb46c1d2b9c27c5aab99daa064c95e2a3bd2251. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZHN52091092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c58c057aa5d1b7d89d310490ce7133944b15fe34f77d0104cf3aee8edf9972a. 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/USUYG1738824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ead0ecd472abd84a2c3cb8de73d0b434d5e9ba98cc3bb1ddc3b52fc35c4698c. 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/USUYG1738829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382fe81ff4798f31d98bd5bced4ce7c78e883e092bdf0a5a9ee759ba7f82ccf2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USUYG1738831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e7f90175ea05768b9c44e48129e23e22cc113ec7260ed93932f8f40f80837f. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/USUYG1563760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce25ffe8a08323111d9c335d5a16875f7c1dbc0a5da34dec80e1e24ee7d968be. 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/USUYG1301006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7eab62f47f06a15003f71c313a1355af010a4713923f6c3a895ab408f8104f2. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/USUYG1301009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e16de73dd2826cf2557db05ee77e7d2132662acd7839dafff7c6c30dd300d3. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/USUYG1201856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b682e777ccfa3d651084310ac30f99b696bdb18292f45d1c29f973e52cfbaae. 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/USHM82161899.