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 0x63a0986111fa13930fc927f00777043546d75d9987f65b6778033f621a191b79. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cc521a6b-dafa-49a2-a984-4022bbd55049.json and https://artists.proofprofile.net/proofs/artist/cc521a6b-dafa-49a2-a984-4022bbd55049.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 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 0xec6ec06c2b58bf131e335800bcaa36f2769d2f4b0bbc3ee5a845a8c827408dc0. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QMBZ92385172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc198fad194ac5759168ddaf82b16c3261955c89f9c3b5e66f7df60f019b661. 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/QZDQH2258380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1f2cbd3df0d55e316f5ac0319742e718d00260882d58bb36483c2373f914e5. 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/QZS7J2288921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf252bc366c78044a89020eaa53778d98adb20b1f9cd34fe728b732b85593cf02. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZSYP2279510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc198fad194ac5759168ddaf82b16c3261955c89f9c3b5e66f7df60f019b661. 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/QZDQH2258380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41bb16241c9f90ef987dba82db016c98409198d76c317d3f0ac7d68674438c71. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/QM3DF2257676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984f0a87829dba179c11a1ae2abcce84f433921adf2329bdb19503b513a215b7. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZXLQ2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1f2cbd3df0d55e316f5ac0319742e718d00260882d58bb36483c2373f914e5. 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/QZS7J2288921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8d5b0478ee1a9c1d467f34ba08f87e2969f78a4686768068c63873d8a6a043. 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/QZQAY2225668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9982ba79bf0a8553ea2bbceec41e27bbefe3346bc497a09512a85c9688bb8d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZQAY2235649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c051d33c5bd5d0e8c3b5cba140fa33802ed2edb12762cf3cea3c57c6e6c2dd3. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/QZTPX2199345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1f6aaa462bba09fd6b2b6b4aab95a63eb50db3f2ae5eef5a3c06be24d142d2. 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/QZS7J2141153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c58f1802dc4b98342d23b17aec91fe749a800a830c503f4fece8f998ecec3a. 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/USHM91679060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd688fa5685f069dd54bac376ef7eb6bf2706513541930ea3d516348694feb9cd. 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/TCAHJ2319137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6271606528dcd09a5fa1fe4dff095a69ac88d5f2ef2002d6b2dbf07457d8bb22. 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/TCAHJ2319150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b754fb403f58c2f27dd0f0fd6c5d27b360ed69e153ca3b2f6734424852adc6. 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/TCAHJ2319184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78ab22cbbd70cf0f5efb815409df46ab81692d41790e864bc7bc5e1ff8ac04f. 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/TCAHJ2319253.
Dionel - Headshot Ft Xian x Naixon Nill x Skyrripa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe353b905b547319eead1a7ac6cbd2bfb9fe393b540ab1473a96b3c5825e294dd. 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/ESA012474938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbfbc422981a2243ddcefaea373136b6c7e8148c79aad9a7372b094105d5365. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ESA122420029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c099478042dbe0b57d9c34d7d4ff0ab3a51aeffc009a8065fa878e0800a05c. 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/ESA122420032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb868447b67ff97904b13e27c4020f3c82f2f1b462c9c8a5c37c066431ae8a9cb. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/ESA122420034.