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 0x49020bb2202e248553608912396fe88e31d59ac062bdc068f6aa1f86edd27e3b. 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/c38f928a-bbfd-4c86-a3b2-7b3d69425168.json and https://artists.proofprofile.net/proofs/artist/c38f928a-bbfd-4c86-a3b2-7b3d69425168.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 0x968dce8c4eb23eea16deda6b7e1d55ec078b66df9c84d43064d8dd994d64fefe. 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/CHC652100095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc949223b8150efa72903aaffb97c9c64446831e9d1632d8f7bab37a0e3d01326. 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/CH6542406506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118f0fda4931f8a9a1c068ceef74ca12148cace64c95c16203d25f41058ccd3e. 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/DEEC31810526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b59eca028d28b37310cc00fe5f015fa7144e8fd3cccdbadca51c74f488942f. 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/DEEC31810527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29babd6cacdb3de5cc86ab3633088705c830c8c1b9c0c6e80f50de46055794ec. 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/DEEC31810528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966187596fe3069e04103d6c94466efe2967404e3cd93d891a8e9161bb948c9f. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/CHC652200145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8466e8f2d2cac231428cba0a9db636bdb3ea69175e76d61b20e5c2eb28b512. 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/CHC652200146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23af3898cde286e131df3f3cce412e3b46fd7fa8d8da7f0a8d630fce39fa0186. 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/CHC652200147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc067310e7db06283c651706e9ff569300ebbf4850c6947b567470958b3b699bb. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/CHC652200148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb07571797110737ef2f34df66353383a4004575a006af24097fb44c8c9fa0d1. 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/CHC652200149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8466e8f2d2cac231428cba0a9db636bdb3ea69175e76d61b20e5c2eb28b512. 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/CHC652200146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268fa06d5fe206f227f43ab4b04003b735fb5eeab32e403491608514685acfa3. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/CHC652100082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b0f5020b8e525df71d0cb7da2968202c9055c184d62cbd0f0b3f19bcb9869a. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/CHC652100083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732942beb2e4f29a24856bc186e89ba95f0a2bb68ec9947c899431b175448841. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/CHC652100084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a3cbc4b80f6c577f1329ac3485bfd7f82811a4e2ae59ef3e4d19a20f25f88e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CHC652100085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e02eb8c3ed516819612487d7926a80d2de3504ab7cc80fa5a4c8140d8207d6. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CHC652100086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732942beb2e4f29a24856bc186e89ba95f0a2bb68ec9947c899431b175448841. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/CHC652100084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b054ef3a40d73903800e5a8e852fd01f0513e1d157c68d848118b0bedcec010. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DEEC31810189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12cfe8e85b8d665d06156f58f81bbaf5e5fd0643fa05ea8e05620ab344dba1de. 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/DEEC31810190.
Ourselves Behind Ourselves - The Drifter Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384a2cd35185e19b3dce3090832bf7e1db7c2f9d387e003ea28497544521b59c. 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/CHC651800037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc0a46ff6e8727d5342805c5fea96f4b6918a100ae7ace83959e07b94c4960d6. 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/CHC651800038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58afb26b8ae7abe94f5c1e5935a38f5eca5db61e436679de97502978d638f5f. 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/CHC651800039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5a112761320b2fe19efefeeecedd2071f1d65dd0e32ee5cd3c96c79a2b5cb7. 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/GBEXH2200225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06e20c9eacc926363d550529dc8e2d7ac4487734ae654e95ae554bfee324ead. 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/DEPI82309466.