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 0x126d6b8e4bb4dfe97b595d915ebcb2a3a97185cbe2655c8119bd00d3eb618364. 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/b47e309f-8c4a-4a26-aad4-b1a616fd51f8.json and https://artists.proofprofile.net/proofs/artist/b47e309f-8c4a-4a26-aad4-b1a616fd51f8.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 0xa1115d489e17886d6c96808f87641d44dd5e52b59081a2c9c7d4ce12eacbf0e6. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/USEWJ0852261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed877d2fa5e139b2894b2d9ac5d55f47b4c8ef200d191403a42b974bbb174577. 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/USEWJ0852268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3c3baa1a7c56b31f467e3a580bbb5819b09232bdd1f7f2bcbee365410611bc. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USEWJ0852252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ca5ae88c6604626f80139f52991501e36485d1cd5880919cba38116a91ee1b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USEWJ0852254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead40d9e42d7e3f5cba24cf8ffa285b20975976aef62dc3c696ff0348abc1b54. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:25:23Z), 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/USEWJ0852256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88cad4eca5a7243b2afb825ef91fee4cb3d8758f8b83776ee0615fad3c0f0fc. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USEWJ0852258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad010ab245236fff1f40167914d99598161e39c8c8fe91ace70c98fbffc71f1e. 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/USEWJ0852259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81adbdbdfd2fac8fe77da431eb55a32fb1cf0373cb13496bd5a1b8890b64c6a0. 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/USEWJ0852510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e6b319a2947c285478fb9d7924cbffb626ef40cf0c415295b34cab090c7a97. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USEWJ0852511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59158eeef5dd99ad70ee36254ad0a8ba4d2787ccc5c457af044ffa072ba940f9. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:58:12Z), 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/USEWJ0852272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e83a6a1961dbe5286f157714e51ccbba8cf446e936dc2fa7344534ff15afce. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:41:00Z), 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/USEWJ0852274.