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 0xcbe4f69b0f03b84faa8736123d42a4fa92885aa06bba35059f9bf1feb962f3ee. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/effe4cf9-766a-4ce5-a280-a3cb0f8fd844.json and https://artists.proofprofile.net/proofs/artist/effe4cf9-766a-4ce5-a280-a3cb0f8fd844.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 0x9db2fdd4cf3b8fb44e2274d31defab36fc4c03a3b7dd7026c910ae8175415a4b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/AUXJM1900202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba929f9fd2c5fb87ea03a00b30532447f7e6e8f9959b257f7c7509815fe2c19f. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/AUXJM1900203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf017c57514013c6ae4883b097b608bd4af76eaa7d4eba28a1f2d638491eafdc. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/AUXJM1900204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e09302c527998a91ffadc98cc9678b63c20d91817236370d25eb5c1590f8555. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/AUXJM1900205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96d009be87650760522ef578225308728c305426eb58371e738a75ff73dda20. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/AUXJM1900206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc157438034aa42d1e801ce8df5c32fc348faa989403a21ccb4ffafc35fdc19e7. 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/AUXJM1900207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbb33fd50dacad4c597a3fdb20e724e9dc2ff285e20989932b20c35aa780772. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/AUXJM1900208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25eba3fb529dc169272a3b4e6c7cef7dd199f6c700ae594de8f788957e80e232. 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/AUXJM1900209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe091ac2eb55fe879b655dccf540c1454bc8bb466b1e71cb9d4b23a3638b938f8. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/AUXJM1900210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b71cfc615c325596e56dde13c5c36a9111cc972b0c70f466039f18ec3e5fa37. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/AUXJM1900212.
See You When I See You (feat. Lonelyspeck)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994788bc6791d371a2d0468c00b84ffc4359662a9aa34e2a8eb5d237558e9ff0. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USUS11900328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4372c58740731c4f166c9aa4472359be0f06ef8041d504d8c0318b5dc5b5178a. 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/QMCE71303038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77886377d2f3298a97d6875865eae27c0d1028d7d247fa213111350f642bf87e. 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/AUXJM1900160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb178037c47cdea1ba70970d27c79f9d29bc297e0c41baf161134a75d82d50436. 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/AUXJM1900147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26772503d151c1548569e6367a97f3edce3fb989056378da1dee0e2d474c66ce. 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/AUXJM1900127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fecfdc0be52ccc63d8125d5f7c26aac230c8d51f573e6f307aa82430ad66d8. 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/AUXJM1900061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f0b3ad7fe178a5fda5c033ed88a0bfb27dd6f93937b7745cc52801c25fd02b. 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/AUXJM1900098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef3d315c8a5ef568b3f65ae34d165ab0b38bb91b70b46a2b96630c38c1dfd71. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USUS11900146.
TENNOJI (feat. Lonelyspeck, Akurei & Elkkle)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5bc85a497d2954dc6c3fc555fcdb656f834afc4cd595a0dc2023425490a72f2. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USUS11900147.