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 0x0f1aaaf11f41a56021917c0b4e3b94bf39d36bc3f5b5ff4f57a107a7fe48e7bb. 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/b97cff50-728a-4e79-a657-07b065d3654a.json and https://artists.proofprofile.net/proofs/artist/b97cff50-728a-4e79-a657-07b065d3654a.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 0x754e712abd708c75bc745d4eacd6a05a0cc9fb872163f5fb5311c5881c9e3cab. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZES72169836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f84013a4aeffe4586c2b3f875d16a2c7afec5fc824eafa7282d2c686fcd131e. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZES72169833.
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 0xe39479e10626cf2df8dcb63c38a761e51ec5ac4c34ba4e145ce59ad7e745e976. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZRP52154759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aedd4946abe5f174afcd956e697847666042fda896f7e5c7b22911f183c06ba. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZRP52154761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe388feaf3a283fdee70321cece32d8d756c21941df674ba8e3ed9f11fc064da4. Chain 2 (Bitcoin): anchored in block 960231 (2026-07-30T08:33:28Z), 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/QZNWT2185552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8805e70a63b70801c323ab0731b09ebf0cf8c419e9002f46427c90bf2bba9359. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZRP52154760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14261a99e732ee5ac02ebc0d13ebd1eadd055c7984ad9841780d5b228111889b. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZRP52154764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37de4c44f0a86784451bd24cabc36fe5a663d8cf8dcb887d72438f203a6657c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFZ72369945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eba46fd3047dea47e3e3c7c817190310400670028bbf0108c5bf9be20ae82e4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFZ72369946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac624dc52bc812e6676a036107d74f80252145554f9e592303e88616f881840. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZFZ72369943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd863b8799ac1a303e4fc75790dfba1e8a0c68bb325ef328a97b33e835771e545. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZFZ72369950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacc783befb336169c03111979ca1bb7265ebb46eaf4643ec4f2f84ac1bd0d6d. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZFZ72369951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe194644669059028c03f57576ee69ada725e541cd72a5de9248004d4877c89a1. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZK6N2229953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28e904efc54c586e4f58cd66c1681dca8dc2d142d9b2f4d3885d415102a2377. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTB92474206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd40d3b89e8a14d84d0184dd9d5d55e045f48ccee8b4d09d02347c3e9743b8e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTB22432264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cdc09226533b38ed1371a943d5bb480128866fd2c15ae1ae27c4f8114b12e7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTB92474219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703694c74ee5edb7866bc2ecbfee625207cc2a30f5fd9a04976239e5620d7a2f. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZTBA2438330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98f81634f868c06f841ac947fdc187132e765b725b5ccdde00d737f95eaf53e. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZTB92474208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643477beb1d960614213183059e92a3ed0f673551f1eda2f4de7601db7f9f3f6. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZTB92474212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b4fab40b8af018e7f85ca9284d9c324f8f212a8fa535e22c4806464b2eefe1. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZTB92474213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc1d126acc31d0d7a48b84b3d99f25e7bc2e7a67a68ad1e06d854659e4a67da. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QZTB92474214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cff514666c499b7a8091bc88a88aff35d5a03a43b18f4931387357f7160e215. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZTB92474215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6b0b813efa63f04adbd9f50ca2ddf232095ceafb66027de0c6102941708c29. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZWFP2338082.