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 0x38600a9eac0c5a97fb5f5082c96066ee19ec288c9d4e95404da7612d225874a0. 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/3aa6275f-2e55-49ca-b456-1763f76360ad.json and https://artists.proofprofile.net/proofs/artist/3aa6275f-2e55-49ca-b456-1763f76360ad.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 0xa3ccb5b1643e4cd8f39af5183a75fab4fe2b1997d10db4c15ee33fba028155ec. 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/ES64E2483633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37db9b0b5b5b1f1d57381904722b3bbc1073cf2f65aa8677cea8f32ac0307713. 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/ES64E2475559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c89a5e567df82e09e8d6d2fb26af0d13d317b79932d32e93dfd58a50f3f327. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZZ662439065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f8a2f9120cfc8f161a6ad67d08cfa418853d806cec78b7795af5cf25675828. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ES75E2307141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943577d6b7fc395293d8dc5f271ea4d2859d45763f72a0c8f7c5378461bdb1f6. 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/ES75E2307936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757c93bf8375f971807f87c18db0f496466ac9f00449f0170601cab2d150c588. 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/ES75E2400366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516ae4e194fe7b4a4d8dbe1c818f9c13c3c9b1a9bdf1459b44f5f019ac28ab6b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES75E2400364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d50b10f88d9bc027bbcd06f243729bf04823b9a833441fcc2277230d7058604. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES75E2400365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0472c65cb7ca947793481435af91917a3bfc43f86c191655b177ff6044e15c. 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/ES64E2347828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943577d6b7fc395293d8dc5f271ea4d2859d45763f72a0c8f7c5378461bdb1f6. 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/ES75E2307936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f8a2f9120cfc8f161a6ad67d08cfa418853d806cec78b7795af5cf25675828. 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/ES75E2307141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0199ec242bb92dd8e4467f0fd1cf4aa1a150a378e4f8dcb4f254a0ecc445291. 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/BK4DA2313884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8ba58f66edfaa7421a52c20a85eb8cdb522d40b0a134ef33449d03213274ba. 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/QMBZ92381112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8dfab05b2a2b6251d75823f7f1e9cae28b3a17d4d1ae7344e176c9fb3735d1d. 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/QMBZ92325335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed694ef3af5e4d1386d208f54dfd71fa42b7297ceceb6a70e2811a9da0fbe0de. 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/ES75E2301233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb32c5a283d4953ba0801bedb31ec726d5aae9468425b0f1ff3f6a0080fb94a. 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/ES75E2300692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58a69540c9d7b1958370444528074f8a6e0981590533e35cfa626d6bab302b2. 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/ES75E2206286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d709813d84530e3c7a3390bcbac5cd0fd6075b42672ec7df850e59e4c32d3b. 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/ES17E2100896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed76eea75cc9ea9c02de04692b52fcc75905cd0432c058e460f9c6b62581946. 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/ES17E2100895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b55516d9bd5b4822d0068e8a2a6c805ceb1ed74a899f65ad9a7ffeb93b090a. 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/ES17E2100945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb06105d52cc495bb3e2cbc08ad3071dea81b583f82018d65555f1091fb2839. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES17E2100893.