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 0x143e77cbbd65eb0316d7453e77fd7374b0c0d0e88ecac713ba149d7cfb13177e. 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/d91c8314-10cb-4f75-b69d-aab56e92a1ce.json and https://artists.proofprofile.net/proofs/artist/d91c8314-10cb-4f75-b69d-aab56e92a1ce.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 0x8709796f85487578b035519c3192ae69d0169a11ba1e6e18af59a5e72bc67c80. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DEPI82410125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a5a9b60932875e7d27c95a47db2e57d49d4961fa1c239047547c3370ee974d. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/DEPI82410126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9b22f7e1eb7920b89d5012b0fd986e23994089d9c60a3b5f307bf4b9c41075. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/DEPI82411608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7609796e00398bcdb05c85b41768ee1cb9fd21f90bf11fb5f9c906c2da8b6a3c. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/DEPI82413136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708e1b27b603aafe2af7c93cc15a8b8731e9da3e4fd45ad97b95c38e77e12fb1. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/DEPI82413137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012afb0273fbe211cd4c8940f7ae1feaafc39675f5ca8d0909ee5a08788a5dbb. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/DEPI82414174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1cd37813a735bd403ecd462c12cff277fad5c74bc19c4129f661caa1c5f4eff. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:05:12Z), 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/DEPI82414175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d252b2453f6e76a2b98f4b94d30997769e96b5723df3c9598512a5fe79e19c0. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/DEPI82414630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5066af92882e812e7106bfdd2a571e72c8280d28d627c0a5f33f3b7f10bf74. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/DEPI82415164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a5e91155ae2280bb0f1f966f4fd81e3a51935fd967b7a46204b6f474793d1e. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:36:50Z), 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/DEPI82415165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc07ee0c554a52b107416b030bdbd2180e4e7aa2eb539980bad3a2c708d96ea. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/DEPI82415299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc009a42a011c686c4964a1a15180fe5e2dc400fed802fff68d387734c77c1a8. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/DEPI82415301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c53a12c93d8b2347ee54f82283f142c53015c641fbf003418cc300641f0657. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/DEPI82417412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf69b98216de8b92671ec4ac7aebd3879be9d1ea6090633c73d5d79800ba58ea. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/DEPI82417413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9b03ae475f9f648194554987205441f669ad2335749cb7332d95de3d582fb3. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DEPI82417416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94708d01ea5a188ff1595564ec442cd0d10182df3a17555c13296b866fc20a43. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/DEPI82417424.