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 0x903491c1007da9f87b22b45eec256cd971d6edbe88a4ac669cfa05bd75e71ad0. 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/24fd942f-ad9d-440c-a9a9-9b80f8b54253.json and https://artists.proofprofile.net/proofs/artist/24fd942f-ad9d-440c-a9a9-9b80f8b54253.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 0x4163e80f7d2ca50eb54489f70453307cd5953ee2a15d5633b5bb84d87e917454. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GBLPF0216531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3f3a20636a4d02be740fefa28876a52b56866aa86146a24d5c6f8b63dffe94. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DETV91501566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409dde476a4f8755d234d7b24a9fb05fd2cdfae9d8441b1bdaa0b3d1737919c8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DETV91501658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ceb1f421f8932012b312e8e3dce7dea93e55ce3a7fa99a0ca6ff8de10f9672. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/DETV91501674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84207570492ede7fb43b2bcc91204281602183c0279155ce56c512b9af807042. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/DETV91501708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f097388cba4179d8a170b4cf06139d1f414217bd77bb8a6eddb1452ecb4a59. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DETV91501709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7579a9e22ac50cc559e6e89412c8392ef3a377fa2e87611a67ccfea537998e9. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/DETV91501707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f097388cba4179d8a170b4cf06139d1f414217bd77bb8a6eddb1452ecb4a59. 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/DETV91501709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5505dd59d6d2a162fcdd81ebe7d97c345bd716268418215f4605244f9d825880. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DETV91501711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3031f96c640b61f7ca40d3458662b5a87b2ea0d73ef9547a02fcdf403e157cf0. 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/DETV91501657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d1765354b4ba4f84bbed815ed2ad3eb807e9ca3338356fd837acab557879d5. 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/DEQ022119071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d1765354b4ba4f84bbed815ed2ad3eb807e9ca3338356fd837acab557879d5. 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/DEQ022119071.