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 0xe2f35647123a8993932c4b583db91cd9fc10d488f3bb6e219b49230071398bc6. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/afa2ccbd-4e10-42ea-b4c2-be0726446215.json and https://artists.proofprofile.net/proofs/artist/afa2ccbd-4e10-42ea-b4c2-be0726446215.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 0xddcd3e259bbb025ad48c6e81f46707eb4243da04a266dbe3e030349a14781090. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:47:37Z), 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/DEPI82432323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a8558fc548acfd9ac583107f816b5473623936860f86b92543ad5c2256cd43. 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/DEPI82431944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9deb2dbd3640aa99fc33ac29f0d93b38f465d1b61eafbb05089f5f1745f0f58. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:47:02Z), 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/DEPI82433458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733a5c960843777f4ca5cbfa106682f27cc122dd80556fc6881bb96a2f547ce5. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/DEPI82433077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cae9f24a8922f818ada4486e61ac010b1c7f81a99b81a6529e99bf407890021. 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/DEPI82433459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4788ab643333582748b930bd8245d4fb7864441821da586bac61ef2c6ac9abb8. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:05:01Z), 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/DEPI82433462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85194b5f7f20394cce10d2bbea4f249b7b12e1436065a42a788ca4cea865f41a. 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/DEPI82433273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b70e8d798ce62483d7e3132724a9f02c380d76d0ff84bc34869441f0deb392. 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/DEPI82433617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda818a5c9616888f7cf20c354d94b875d7bad5b4df3b53f727406063a33a3a35. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/DEPI82433660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b032147439f623d004ca125485f89ecc09baed2c348bc0ec800160059a8839. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/DEPI82433661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed6bd8bf5d1cdd8e4599edee6b7f6e38af82885964f3956617aec7cfbb5475e. 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/DEPI82434736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511ee731b023cb9dff6295a5d61e9e3a1e84ba7203b416bc0a91254df8dcd736. 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/DEPI82434731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1fcb320dac0fc8859094640d477795fd05fe7d817315dffc71c870ff419c0f8. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:19:39Z), 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/DEPI82434734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2cd78fb68d03c46871b09eea993655048039681590a82cfd4cab37f7ac1c86. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/DEPI82434735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9466c702eb8c07fd8d5209db8c3b5cb0f3c794b09dee59d4632b9a0141831a0a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:27:40Z), 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/DEPI82434730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9145d81869f8c19e1217a3a57d3bc2a5c87b06397d5845a0e4f3340cb3b19bab. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T16:21:18Z), 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/DEPI82435019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a62025bc0af12764d285c9dbc7bf85e20434e60f459c09521c4cd581a225c4. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:20:55Z), 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/DEPI82435020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365d5c6339b10b0a658f406d00faa42a4bcb3702eae78619d9eac822d3537f18. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DEPI82435024.