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 0x60848c458777459503635690f393de20f0692d104a75897ce180ca9ceb7ccd04. 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/b46bb034-9a57-40a3-805b-0010b694bc46.json and https://artists.proofprofile.net/proofs/artist/b46bb034-9a57-40a3-805b-0010b694bc46.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 0x735d6f3c6993164cc66d40393ed5ec8eacb335e6b9bd12be2c75e5bc777d4032. 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/QZMEP2074225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0d01fb6bd01811b9e38b668dd407087b8088f4a8f658d5fa7c7f5662bfdd4b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZPLR2028396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d603b64088ee3510d85e7c7e664fb7942e7afe91d46d2458b38a49974098a3b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWR2197879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fde17469669acd139d93fc3a13368bc5fd139a090a2b9e2a97b286d73f3294a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZK6J2465902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3dc16875b6dac79ea89fc767febefb635ffc48e0b6d999e10ad02c47c0205c. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZTAS2442111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531cbecb3572cb8bb1e9216e33af596761e60bdddc02d4454ae373cc42eabd84. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T14:47:50Z), 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/QZK6Q2508712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5af53e4a548359cdcec36276487b5dbbed350d24020f9df485800c62e598321. 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/QZMEP2573031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21dace9408bd85c9163f3a8a94107d90412cb31b7386a9710925b55a1c0e7e6e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTB92551243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277dae427583cd8eebb3ac2d8eda6668b8876904a9ebed13c03aa04d2d01f428. 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/QZZ7S2511682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee98526d686203b37dfb26455d8c0844fb0018f64e659799b118e5447001997. 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/QZHNB2201463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c69a1cc2c6c153c4e309e73c4e96cfa0293f1cc88fb9dfeb9492478b630c2d. 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/QZHN92122466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4602cdf89e0f1821a485a727086318bb299ef1fa2e754ebc5a6a2ed0058dbd02. 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/QZNWY2225113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0de8d2d9cf6762a1c1ff26d22abc657df6054adc96191bc4a1b7be873a09dfd. 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/QZHNA2140728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a0013acde94623f4f36a6b3ed3ab91fc6cb8ddd47a6f23928e50cc77b1d7cd. 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/QT3EX2418424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd819a204342af7f8a977d0fb403cade6380395a567c332a6bc375d38825b2d. 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/QT3EX2418428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7bb206c0b74f6ce4d56dd20ed73bccdad28a4353f97e6efad63708c095cb01. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZMEQ2196796.
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