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 0xf7ebea5257c17256ef721c54a39f80ed8936f68b08e2aae2774d671f2e86b881. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/34efe51b-9c03-46ee-9ef4-0841babaa496.json and https://artists.proofprofile.net/proofs/artist/34efe51b-9c03-46ee-9ef4-0841babaa496.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 0x2a2537345fdee23f49e51f41bd580a1fa69121d95fd7dfacea1754465aad9ae3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/INA441000083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092e38fce2b7c58fec32c12ccd4c49db378dc2986d0aef02dfe6463a354fa4dc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INA441000084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e33e3ffee565910ca058ca49978cbb0d42b21ab51ad91bd47cf896bfbe1903a. 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/INA441000085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1903506df07c4aa78fb1a291a8cf7f282fe5c6258ec77cdc94379225bb54afc3. 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/INA441000086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493ea0966ac67def8e41fd39be3f56f6e04b2df907f9ae1fbfa28acb75ad4131. 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/INA441000087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9bcd9b821cbff048b79713aa028b5a8ccdbcc02a4ed17f48ef8956d5ededd3c. 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/INA441000088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717127110054c0c23e7a4c402ae25ee58f52f87e75b766466dd46a2e74077e0b. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/INA441000089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56cd04dbf3ae77da2f04f4c146a14450a1b6bac6db8d6e91caf7ffa59f2dbadc. 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/INA441000090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3dd3995eaad68c5a9e283d8a8e42ebcf4983961e9438749fa02efb03468f700. 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/INA441000091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab25e0480f60467946708eda68de70e43253af204d613d610e976f037ddfd27. 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/INA441000092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e5d3ac358735e1040c4265e8372943403f662bd8dd789f1e6d31e3484c34f2. 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/INA441000094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5537ab73f6ff796cbb66428422d3c731c1304ec53b81794f9ef5ed1ff8b5b106. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/INA441100079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860b363eb73481e7d2971a3c811dcf6c2890cd1caf5a2db78c157aa9be006ca5. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T11:26:03Z), 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/INA441100358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2c91537bc8f1c56392c2e0638d395024ecc8a7fedb16bf3bdd420ac9358804. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:52:40Z), 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/INA441100359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73af016852a1c6bfc256ee271a9e770d82f561e8e9216840679fdc0459eb15d. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/INA441300100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7846791ff04c049636e8e412a405e2015bd2f3563c9b9e7b811c9f6058ac90dd. 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/INA441300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7619dc8f6e91079c955dd987cacaff484209123721b10d522ad5988c4382b8. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/INA441300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b77b9480e807527ca1c8e756ff8cd6a907dcb4bee2dc4c53db844968796f99a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/INA441300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e3400cb4d2d796d526178879a22ef92c5795661868d55184a965166621aefe. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/INA441300106.