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 0xcbd45831f79eae63d2078868a951ce9ada19f1355d67316899339fbd6d53d7df. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/89dcfec0-f50d-41cb-b65f-9acce975a2c3.json and https://artists.proofprofile.net/proofs/artist/89dcfec0-f50d-41cb-b65f-9acce975a2c3.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 0x8c7e7585cca46f762f951b5b59369b9a24e332bcc69b70af367da6fe7d14a955. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:34:48Z), 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/QZF8N1908777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f099c4fa340ef40860d313cc4da7c72c1267da78a9a8a2f9dbd1e59f9fd75c. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZF8N1908780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a89377139a4a8b16b84be43dffff12f52e050495a9ce9a81c298446b1a6901. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:25:02Z), 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/QZF8N1908772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea05181812c7d141f3dddc0e7de4983600a085763d26311fa4355d3f45506c1. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZF8N1908775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb2f7316ea9f2f148902c00d685f2273ee98a91ff8ab75a69ecfcab6054a62e. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZF8N1908765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f649d4cbc6e54a720c5268d58ea5f4d8cb2fcba0ea118f252cd71ed7c84c319. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZF8N1908756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1204791025130cd42e3ca285609ddb2190a8cfd8e3ad65597224128e49e51ad3. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:22:48Z), 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/QZF8N1908741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de6fbe98b550d2bc978b88db4d978260b8dcadc613ef3222ac9b3d084fc1f85. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:32:27Z), 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/QM8DG1956083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6bb1d6df3c93e35471946c78cb94cd972e7ff7e63ae9a4d2e13f6ceaa40da5. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZJRB1906294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c584a1d2767e46fe43d341c8038e1ee301586f5562361c3ffbb628168f3124. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QZJRC1960884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24ee5feacd31a6d1eadbdfe390d33d7fec0c9b8ead4151a6cc137762e19cf0a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QM8DG2079316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8c4ca49cbf2121000f7e095a09851864b48d1a6b81b6bfe8c5287ab3e9780c. 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/QZHPJ2056758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57a5acd03408a1f18cb63e53d51510382fb1e36c0076825b8df1104758e832d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCJPQ2164967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c81ff5d28a83ef618faf857430440a2b1933b76f389737cb040695013586f9f. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCJPQ2164968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310e9fd21ae3969033f58723ebd5a4bcd463007355129655edb5489ddc653caa. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTH92124889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4628b5d211c5d1c548f86e2b48c6e83fa347e5360f6c6fd116dd25cb8c1806. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCJPI2517766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382b590038228e90234fe73806c019fbe4e763646511343e983ef307bffb4d87. 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/TCJPL2571362.