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 0x3323960b91e5c5f7d626db00622c29971afc70bb3ecbfadf90ab3197094b5060. 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/555fa4ad-d717-4826-8c5d-e611c1b74e45.json and https://artists.proofprofile.net/proofs/artist/555fa4ad-d717-4826-8c5d-e611c1b74e45.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 0x3ffded1eaa49ca9a9df6c7a7bcbf187b042cf6c644099519603dedddd00f217a. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/DGA072286234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9a23675a735c5493cd49b3beec6b6baf3c937aa318cf4054f6a15bafa15792. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FRX202303027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4face0810922c78652b505c88c3f2dd94d4f77633879ab7bdd2b32bb861a0e5b. 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/FRX202303028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101ded562c47ebc606bd9680a21f73c470aeafb733db4990c5028dbdf32839af. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/RUAGV2302321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28ac1f5e5c510b5b35a32b0d61c18baa2cb46ed5751d8b6fd87a827a4a031e3. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/FRX762358098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c93a2d0cbd6a0bc95ee867ef84a642284240d6a0ee78f53a153cad2b34b6607. 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/DGA052450452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64ae20e525a675173e4f5fe9edd48d0e203594eb975bba9036ab67756379a23. 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/DGA072426041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb859d86d2029cbfc743ee43136f15743bb891350e03dc7b3d23267139fa2304. 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/DGA0M2463783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112966ea502a9205dd86dd4223da09d51a81fd1e5bcc395e0512b681973580d3. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/DGA0H2426130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5010c0ae88e31d3d41a47c10f787dcfb63b5573a4f6f454da659ed0fe514141. 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/DGA0Q2419920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26db4fada0a76c936addf7507bce59e64cd2e2fa928d38f8c22c294f86b0c7ae. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/DGA0Q2419922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2791e7e74d3d780e9a1a621a016e78d139b461f844d2332f84e35edcbe0537. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/DGA0Q2419923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40bc75ec18698d47ccb47b602b8ea048c642b51d9e2c8505369c6969c66d00d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DGA0Q2419926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ada1c69231c256968cb1aeb66fde8aa581a188cd737752743fc3fa0a4e82254. 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/DGA0Q2419927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6b0699781ed173e4aaed15fa3432743875f35a8719239e73da646ea1c2ed41. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/RUA1D2590781.