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 0x295f3dd18376cf275e46e030f4e7b6ed317e71849a18818a7ed129c6eb232bac. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c917b953-981f-4c91-a325-ed013818d417.json and https://artists.proofprofile.net/proofs/artist/c917b953-981f-4c91-a325-ed013818d417.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 0xb9d04c8ed2ebc780eb9a4e38e62b3e75ad200b4dfc00fdef1ff9b024e016f867. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR96X2305387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0df2ee8161e00c9fc7781821e9d9827d14bccca8dfb4737212b4ea170fd118d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR96X2369211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4539b260410156ce0154cbd443fe5eb7ffc84f31d110a73e3d2d6c605e04bcf. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR96X2305382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99ac5e9a3e1fa91f38a9b5dd72e17667eeb9aedb0b94c038dd69b6fbd981a5d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR96X2369209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abf72c820868e408db11271c673e2b2e624f6374da925924fd3fc583f6555c9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR96X2305384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4dca9a70f734b5b98ad609ad086126fe1ded8d12e8f83b09c2ce50093371e3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR96X2305386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73244f9982faad673907df7d2765c61addb5ff67e26883ce2c394a28a29c49db. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR96X2352224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6faa70d690037e46792213b55abe2a9679bcf7956fa8dd17ab9915b69feb65db. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRX452321205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9351993f36cd8515886e9bc5a4095483143312ce37b11c2d4c1e1bc7f5f441f5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR96X2352221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59d571f0ebc0d85362cd2500a0fc9ef55472e3f199cdfe8a3d83a3bb69fb647. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FRX452321207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abac1bbb68c29381cd715fba9c00f3a6bd42593ff4cdf21299be1e067a895ab. 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/FRX452321203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62877f0ab37b172c39a5c2aa1792503e38af984717dce8cabbdf9998769cb194. 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/FRX452321204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515d0bdde4a4319fe3d7f16705597ba04eaba57e0e8091bf6fe9e5413d404a74. 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/FRX452321208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3a5ec02833860ef40ceb6302cb169578709cb5072c2583b5fd9dbd8591d449. 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/FRX282396930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24f7cc20cf7b59fdeb048e9d1c1b6dbcdbf19140f717ef4db622880f91ac09a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRX282396931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085f1ff9331f9e963f6629bf5577ac7b3577bad020d8d3daeb13586d64d36e7a. 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/FRX282396932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83260d03fb08e392b1f0d0e273518ba4ac5639eb7fa07522b337b60ae1d03cfc. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/FRX452321206.
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 0x65c3a0d455804ce42ec27418a52a41f3f26cc649ed3e400116815e39639755fa. 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/FRX452321202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57b031367418afa3dd6bb0776e5251e014f420b476193b47515e8b7d58b3419. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FRX282396928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346cddeec3f1e9d7d7be07efd3a4130d95f64bb57c4f0b501f937a6958de2213. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/FRX282396929.