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 0x0a7bc2ea55357240b27fbafc25fda541d036ff2dd751a103ccf253aa8c87e6f0. 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/96863cc9-65a2-4700-8a4f-a27baffc8bdf.json and https://artists.proofprofile.net/proofs/artist/96863cc9-65a2-4700-8a4f-a27baffc8bdf.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 0x6e4e3ba0c34f3c9d5a2c01c54b2c5802050446f6f037467a6087232bb33e0cd6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPX492001034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4afe1c1cfcfa9ab1004fd150ec0eee54b2efcfc4113921d643f2e5202e9c2e0b. 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/JPD862101302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b694d040fa760f69266c1e2262a562a9b4a8e07387527e5d36b8873efd7045. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/JPD862101323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e23f983eb3b491afb6ebdb7bffbde7ffb85925c4f7583973d7d49418e1575c. 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/JPD862101325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a4be499a343f7c568ac3f6232f0575f15452f51e5bb22e2459cf21fb164850. 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/JPD862201372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc888b7b04e7f97e7920592bad0a6c3bd1d763e028bef91ee816689525b896ac. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/JPD862201379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc664cf1ca384f406bc86309d8c657c90f1825d3d5fb52257f25c05a5cd6f57f3. 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/JPD862201363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e65ae0018e847d7ea35c8d7ff906572de39febe99777326d91faa09abded281. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/JPD862201359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd428f61b52be53702434173827a80a11d2604611f2555dad5230df3abdff1010. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/JPD862101343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5cd4be64528a9b0d0f4962ba35796b60a561023e79f9904f419ff0ed4d0982. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/JPD862201368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41336582b8448200dbca0367702c6d309c0e54358c1f06b204b913b10a38fe8b. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/JPPC02312588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d69b0506976410c5842afb50a0fc338ad892d65a20021d46e3924baebbaf1d0. 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/JPPC02510513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab845212eb6175c249370cdfaafab9d12e84247d45faee702b41aa9294fba7ce. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPPC02510515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96a2274ec6a0adc70e0640d284c20e4cf330e8300fde65f4b9513b115723f93. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/JPPC02510512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd586fb3659b936069d2c2135e4817614f32b7dab5f389fffe810008683265f78. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/JPPC02410524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d7ab24a06e8e714a206cc2e40c3a3b7336c333ddc0df1d63fc8f9b58198d96. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/JPPC02312833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875567c231a4219d061c7c55bb3d89076feedff4a5e98b5fd4083993a65e5e96. 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/JPPC02510514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab845212eb6175c249370cdfaafab9d12e84247d45faee702b41aa9294fba7ce. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/JPPC02510515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41336582b8448200dbca0367702c6d309c0e54358c1f06b204b913b10a38fe8b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/JPPC02312588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9d7727cbe5d73e056e1fb3ab01647bfa658734f85ca5e0d261e8c9fdd31fb4. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/JPPC02410363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25818aaf5d58a93d2d8868941c77b7823d5cb2530fc99cfc4192bcce593a1a80. 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/JPPC02510516.