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 0x0b9c07ed235ae46d3d09a62f6f2195914ed759bc0d5cd9b6fee1bda6d2558271. 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/977d8391-f2b1-4a3c-9b82-2dd65f3c6504.json and https://artists.proofprofile.net/proofs/artist/977d8391-f2b1-4a3c-9b82-2dd65f3c6504.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 0xd9ff8bfc7dcd7b73ee0252161439a25ba8e939b48f82ba83773ed7546471625d. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), 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/QM3DF2255527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec6baf919cb72121878a0bd4f66193091a822fb41722ea4bb55ed2092d3a211. 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/QM3DF2276248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29ba12256b990bd34a28030a72d0a1373c68c84bdfb8ad2384d02743f15d553. 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/QM3DF2287387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c236bab5da0c2ad5318a4a974223f1bbd1ea8d2de67ebc27bd7e90e30347af. 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/QM3DF2287389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ac0bfff060e9f8b56f091331cfdf19cbb928b9ff2d7de8d4ef50cf3cf37023. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM3DF2294272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bfdf99a08f6f4060a6625d76615417fb014ed6412d604185e17f7e8765e776. 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/QM3DF2294273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2667cd2e6eaf09513eca64552957c7a0cc1e796481f3d469b68b775c8d6d215. 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/QM3DF2294274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd56f3060083b73846e6eff3702a4d3aa5957cb3056b8a05b27809c024da336. 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/QM3DF2294275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b3728e3c3842852ce635f48860fe87f0d13d6536d6bade7af5eee50918262f. 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/QM3DF2294271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa359e79791656ff911b905aaee635d40e9e7fe62e7002cc25b3a3e067e2b5359. 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/QMANG2220662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b72aa07fc3ba1e0f87ef7a9658a94585e54ca00b21897ba6133095628597a4e. 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/QMANG2220663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd5e5ab10298b0cdf0465a5e0eb7022c8f04252e834f0858ab6e536c2e33552. 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/QMANG2220664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedcb32c6ce20d13cd5fd95dab2cb1b24b549d991da0d39e57554f478c3b39dc7. 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/QMANG2220666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13ab6660f513ad7e5d13e1482461fafe778965bd5a019e5df1e50362eab3924. 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/QMANG2220667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9c53a04c33af919dfe0f81461a718b559118e84aa21337aaf913db364adde2. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:29:29Z), 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/USANG2314182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74d5b6d60381bd0d7b6f27ebd9c67f229d24ddf3519773ade88f0c249ad296f. 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/US3DF2402846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1234f23d2f500a38dcbccbd2fb4ffd0fb5fffb0ea908a48732647e9f1e9c4eeb. 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/US3DF2402847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848746fa4ff59534ca186fd3cc630e672ccf3e820159ad084c176daa11e8f381. 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/US3DF2402848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c89d9d3b4144d2cf23979a48b365ba530664275793b415a6614662de4251653. 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/US3DF2402849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7ee7b5b444da192cdcc52a1414f7d01070b1458b814df28193337805187940. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/US3DF2407356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb242c024a33f698e21881b91f7a44add74821e6c1c28356b763cf83d6b7af6a9. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:57:59Z), 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/US3DF2407357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15bfcfdc2dfb5c6b2c3518a2c1881015267af2daa3980df84e1d78e9446c8ec. 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/US3DF2407358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb305ed9b5633bf3979b9246928b7374c9b1810cc4536b2666edd5c94174706d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/US3DF2407359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c2a66e4da1f5c52b047e079cb256b2f7ae0f22331e825890ec1c0415278d16. 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/US3DF2407360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2446466fa4c42e2c0c7681ed6f1c491bf1f5fde38d4d66ba5772ebbfe03a465c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/US3DF2407362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799f795f769f4c39888bcab6c1c00ceb283e41bd0befb36b2b273ee048774c4d. 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/US3DF2407363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f70f2ee23fca7e1997073ba59810f689854694cc86a5a96e4439a30a73d446. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:04:13Z), 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/US3DF2407364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d3c11f5fcbabf4439e3451ceec60ff4172148736a5b5685836609ae9bebd1e. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/US3DF2407365.