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 0x67d0cc053babd92ab2ae45910c154e3637e3dcdc526079c8ffe87503fd24c86d. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c88c95b5-1f74-4607-860c-fcdae78c3899.json and https://artists.proofprofile.net/proofs/artist/c88c95b5-1f74-4607-860c-fcdae78c3899.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 0x18517a59063ae71968bdc98aaddbabf0696df0d863afc7ede20d41448ce4e310. 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/MYSM19310003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f308ccf1e447c2ed7090cada9d0c382381fe780d79413c6d8305e72d290270e. 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/MYBM10200656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979f24bed93c539ef69f68f9298bed0c5290915feaba60b54a69a053ca26d81d. 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/MYSM19010002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf615d7246320cf2e2c09ff094cbea2e4a06bc461cd30a160fd5acab2e433919c. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/MYSM10600227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3157411f93ff3d28d9dbab0695218404ba722b49aa1a8701c6d4b60d3b27de4b. 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/MYSM19110001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa425e8720e48d12347b0fb5265da914d28d317a2d6cd36216532f0cacd9a3849. 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/MYSM19900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6b3b9b8006ee7354b01667cc205da81de0e75174bb5a9e582a8ebd9772ac2d. 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/SMMY10600243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d952ea3a44cd9b04cfb018ee5c65c2c5b0db0df55a96d852547d8558baecdb7. 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/MYSM19410012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666e3c03f1a3fff30813b6363e620dc5f0e892f82efb34d84207baab700d3b9b. 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/MYSM19610019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26464844a4566a19712239a3cd656e39a7ba45dd41b081c9db372ee06061970. 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/MYSM19410011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932c785e1282f92b6e4d26366dfe5a5c34230db686921b73ab34a53d5f246d4f. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/MYSM19710029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c5f65f3b817e9a2c510658f4c55f8cfb37ef39746012b9bd9136f8484ceaae. 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/MYSM19710027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31752b140160512d9d16ae155eb20f5cbce6f971eec13a8162d118ba6543d408. 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/MYSM10600265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8a421b734739dc3e61326aeca1a384e30059d93e18d68992627f6a5bd28804. 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/MYSM10600290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d87ee6dff519a1e85aa11945867c2eb54204a70f80296a48d317fd6cb3263a5. 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/MYSM19610040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e424f8ed5f2b31883aaaad7fc18540f8f06f624a196fb66fb00ec504d00506. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/MYSM19510027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d49e401b678ce48db6a0b9d3af32cf07cf0f0f821d9f2c16dc5d9d67ac3386. 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/MYSM10600302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f308ccf1e447c2ed7090cada9d0c382381fe780d79413c6d8305e72d290270e. 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/MYBM10200656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb74cacadd88105349d8b7e44a47639ae31a794e424fe35c5271ec305a356436. 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/MYBM10200648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf615d7246320cf2e2c09ff094cbea2e4a06bc461cd30a160fd5acab2e433919c. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/MYSM10600227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f63201220f2d3f3960fb63d5be0e895bfef12a42bb63c221f4395d504efe71. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/MYSM10600239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6b3b9b8006ee7354b01667cc205da81de0e75174bb5a9e582a8ebd9772ac2d. 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/SMMY10600243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d6914810c963a16146bd1f0278df7a0be62a8160e3fa450c7307d753972f8a. 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/MYSM10600238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a78a1d37e91368ddf31342f4b77efd2e27dee1049b4f989a5991fa28f00e26c. 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/MYSM10600148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cadf0d7dd7b4119cdd60ab7083af8e4bf641ac5d6b8e0a7535584cf16ca5659. 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/MYSM10600244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443e4099a32477a6fe84440f4a190ec881f12416a87cce334cfe349d81fab43e. 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/MYSM10600230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d9a9bf680d8daf982f4aa7ee3ea7c6ff5fe9578b5e638e4062394255aa8aa2. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/MYSM10600232.