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 0x952803224e3ed2701db8e4c4c43acdd104d692ca0a4c97bb5784cfde0283eff1. 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/06411edf-880c-487b-9576-671c9adc12f6.json and https://artists.proofprofile.net/proofs/artist/06411edf-880c-487b-9576-671c9adc12f6.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 0x69facaa6cd5bf9915f79b0f7a1c6ec8d9a973a8aa0ed10038970b2f0b8599690. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/FR10S2358172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0b42090862300ac06f5446547ce128c7af73fb41594f035314ecc572035463. 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/FRX202308166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209ebd1a1841cb095ad644c3ac11a663c6865874e002446a4373d1e92edf3027. 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/FRX452321316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f48c3ccd940cbf0de8ccfbe2b293d533a93d02dc1641fdbd8b6dfe1b43c5fe. 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/DGA062371492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073fe200ea4bc5afc9636cf8200a404035c66ff6a8f64e9cd1af193fdc34794d. 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/DGA062371485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a13af8e32457a2ae19b0698916fea0b382826e17d8258b5498ac100e6cd519. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/DGA0Q2341380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4101a9be27f5d1e8090bdda37a703fccefc4be246eed548a71deb4e287cfb3. Chain 2 (Bitcoin): anchored in block 957959 (2026-07-14T05:54:20Z), 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/FR10S2428845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f89f9c2d6d05ccda4f90e4104187ebc7bb7849f69efb788a0818754bd8136cd. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/FR59R2490838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d44a8efd2ef3ec050e6927a0793df24071b48406ef8aef901a03e792baec80f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR10S2474402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12848d0cdd4311cb978d56ada20ee40984c7bfe5f64ee2b4dfce66cd780bfece. 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/FR2X42435118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3917f6253236e725b803975faf97fde368f8008b8d4cd255bddb603331e4da05. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/FR96X2450723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b0517dfc44f6d111e28ed6c0ffeefb3c5c8873df9daef315c3e537927b446e. 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/FR96X2450724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fad5e2ef1f4ecc4cc12d88f685f957a348b5394c4d71a234005daaf5c56dc2. 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/FR96X2450729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d3cdaa5bec03e8f36c9b4247c254e6a2207fdb7bbf1a5303393633ba9618b8. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/FR96X2450731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527a118befc0cb65d633679a0fbe2b99a8e4ed4921201ef053035c9d414129c4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DGA062403272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4132ce295c1b7dd4e0db6f85c1d6744f31db34dd4b289e693134f3e865ad89. 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/DGA062403273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1292816fca7d4594f8fd8de5cc997e588f68c1dbde6c829d66d6ff8e56444fcb. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/DGA062403275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13d075bf21f99c31111ad501f821a078f035a14b8b64e74a3b8514886cba2a7. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/DGA072466130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86103939a4ff910b3309c6629e2834935b7c83522a534741156a0275f846fd89. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DGA082414620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b37c26d6155d74d2c38b335d74bf876eab64fe30a6e54204c09da0fb2e2409. 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/DGA082414621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf91dcd0ccd038279c8b8653e46bdf5d7b00e70537abb279a2c23a7d36b3fad9. 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/QM7282492999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0aa85ae4b6074f2f6bc8765314bd57f7b231370b060491c384cafa9627418d. 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/DGA0M2406823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4670802706fac09c9601195f61ed3427b6ac0687139e434faeaaefbf6c94fd58. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DGA0R2469245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a23b5850483735bb9171f9db1bfbcba24536be703cd8c4c3af39f7aaac493f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DGA0R2469246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105456c90caf9dc20f5062b49ee45fd4364bd6e81c13f5abfa1adb3d391137cc. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DGA0R2469247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc138490d3dd5e5a06a4881511c3c6c26da18f079f82e8bd6a4ac6d3f469b1888. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DGA0S2421352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29aacfe7cc0f46412a03642907428f816cf85cbf69e1d058dbb2417eef4931f2. 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/FRX872553069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93eeef442e352f1e0555a5b9867c71d56e8003cd43bb3d1f7d1d388d6112bc37. 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/FRX872553070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f689b3e6d02f1ab37f9cbdcb270f7db5164ec46a24f401e89a472c258ab1b89. 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/FRX872553071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f39819136cf2bf40dd8b686bfc3c9c35bdbc879d76d6f57fefafe26ef71b1ea. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/FRX872553072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50ccac6d44df8a60905c0fdf752e4c662c83798644ccf884d7d6781f19dab35. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/FRX872553073.