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 0xdf142f7900da13e14667748b65ca4831a5232b1c36e39ef164fd6868a09638a5. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7c01bd2-9949-44b7-8ae0-b4e71fcf5695.json and https://artists.proofprofile.net/proofs/artist/d7c01bd2-9949-44b7-8ae0-b4e71fcf5695.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 0xb34fdbe557c0e0772285621fc604883cb367d8aad661333b6ce9682706a00937. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/TCJPN2033743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7718316c985010f0c059f559e291b6228bc3ab9606c63ea4ac05b4115f3d7ff6. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/TCJPN2033745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6721dbed12587957cefb66327a29d6c2f39d344a998dee0df2b305c6d1631de. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:04:27Z), 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/TCJPN2033746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14dab126cfbfd0cb64cd694061fe5269e0fc4cc9ef08ac9edc1b0eb079791a4e. 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/TCJPN2033754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e5dcc6514582e96ceb12dbe3f48a97774ff55385f13a7ce1c6fc683e9b275e. 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/TCJPS2282221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05cfc4e0b118a070b157bb451a9c6b2ba247ae1f42ab0e699515244df21c9254. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/TCJPS2282227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c635d1ee23ed35f784f1dc7e043acaa9573eab70d7d696191e4c448cad3f06. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:09:25Z), 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/TCJPU2217827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e40462e60893e5b67598aa6b6a4321fc371f90643e9401acfa1c18d51a4180. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:49:05Z), 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/TCJPU2349182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3a8ef13d20c289b363139951ad3f0222fc372a2e714f0ad260ba8fa6a4cbdc. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:23:30Z), 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/TCJPU2384178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d598b24e1d8b8c2cd8e84d7296e028f64dfa80f72019b0d067fe53032903691. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:06:58Z), 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/TCJPY2335157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d1e82c1b6aeabbaed1aa02bef30109e3cf8365a02f900d52921c9a5991ef77. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T21:01:58Z), 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/TCJPY2342439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9545a0714762242670eea68322503080eda3fe025c2f9f939e84e22cc6fd7cb4. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T14:59:39Z), 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/TCJPB2495283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a646470db75a5474ec0fcfd6d6ab860ccc1a152b6d76312b5a4bb439715eda. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T18:01:17Z), 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/TCJPB2495376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b347bb2e9bdaaf03fee4c8e9394a3537dd936fd4613fe6e1f4f5db7c563db57. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QT66K2500650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97012400a74cbd90af84c9f0449243f72f2ee067574eb8b5298268f351d41762. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:30:39Z), 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/QT66K2515802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd258b8052697bbdeb961fbd77fa7e3f783777d036393e128adeccab57471e7b7. 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/QT66K2515806.