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 0x1ca2892a1c0ed995d304ccc7beefdcdf9968683b80783f7cca0178f0a7a1ae41. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e04e9c3-5c5c-459b-b32a-45002406f9e1.json and https://artists.proofprofile.net/proofs/artist/6e04e9c3-5c5c-459b-b32a-45002406f9e1.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 0x3508ba617e5af17e5766becf6a41248548b3357ae3a1a9caa049b2d7026a4e41. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6N2492714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136f9b0baf207a08811e2f3f0b87b7016c64dca9b7af4f0ac84952a3ea071473. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:03:14Z), 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/QZK6N2491360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa380e51810be83b170444f6c39c516dc3c28db869ffc5c7236374ad58d34a091. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZK6M2409117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c59c5265027ee5e3efd1b2b5d4fe18f6975519dbf5452a16494c54c8255d58b. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZK6M2406376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa034303f9db7fbbffdd768e01b8fd2ffd47cdc0b3d026c13f5addb657353d4a2. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6M2406377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4aabbf15735382107259699660239d5a4f9c42751a260a2582367d93271e82. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZK6M2441673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bb0535b9b35f8de12c0e2898f01699e718b8a4ccf7771bebb67ce4582d4734. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZK6M2490774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa034303f9db7fbbffdd768e01b8fd2ffd47cdc0b3d026c13f5addb657353d4a2. 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/QZK6M2406377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c59c5265027ee5e3efd1b2b5d4fe18f6975519dbf5452a16494c54c8255d58b. 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/QZK6M2406376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd68f3168a8e2b16631d6faed42cefbe887ba57e51181ec6bc8dadcc8e1a3693. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWW2428478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3508ba617e5af17e5766becf6a41248548b3357ae3a1a9caa049b2d7026a4e41. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZK6N2492714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bb0535b9b35f8de12c0e2898f01699e718b8a4ccf7771bebb67ce4582d4734. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZK6M2490774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136f9b0baf207a08811e2f3f0b87b7016c64dca9b7af4f0ac84952a3ea071473. 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/QZK6N2491360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8927baf03f17b100cfb81820a1350ccf245425882851392396ab1d5dfbf17e. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZWFQ2410573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa380e51810be83b170444f6c39c516dc3c28db869ffc5c7236374ad58d34a091. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZK6M2409117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4aabbf15735382107259699660239d5a4f9c42751a260a2582367d93271e82. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZK6M2441673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78bdcdb88d3915eb62c6fbed14114b0e05090edaa41c46febbd0ea8f1a9eb407. 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/QZWFP2448421.