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 0xb4502587d16399f0f79e85174445f0520bbea9904528ffc57bb7036b697cc617. 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/6590fef7-5b22-4607-8d24-24fa2dd2d95e.json and https://artists.proofprofile.net/proofs/artist/6590fef7-5b22-4607-8d24-24fa2dd2d95e.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 0x5c18f08fd4777855d3fbfdaf80980996868209eadec256b995e8fee6dc81964a. 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/ITB551714540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93dc6ad979419f55a80f9cad0fc807e1a6d237ec0c31f331230a6c489439866. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ITB551714551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba58279ce28ce79ddc60cd281c24dc2687e1195c4329db43dd188a84fe227fa. 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/ITB551714537.
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 0xaa384748c367bbfd92aca042456f4d178205f0fab422ce38ae58ee2567e53ed0. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ITB551714538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0272e2ee0ddcf040e8566031179c5e53765aee4c499fe062ecba221304654f51. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/ITB551714545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e32dcd5787cd2ce7bcffa20ca8be64ac4f516594c03cfbb49f5499666c9dae. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ITB551714546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7264c009407dc2c694060486286f9366748df0c54cbcf5d8ab2238a0f82e67. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/ITB551714552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c5b27f2129319fb0b8420af3641b04ba96512bfb372d516f23f120d1f6d73e. 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/DGA052044726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643bc8bf0d885cdafb1dc178ae298e460bac1b248b80e27453e99de098eebd0d. 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/DGA052044721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50ee02946f12279530ff5f9de6cfd3642dd46d844470a1dfbf5fc1e47390804. 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/FRX762018256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786c2ada5ddafb3c4cea7958087de916789b814ccae876afe14239a10af19f84. 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/DGA052044723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9780bd85a864469e1d26cd11dd8ed56ccb87502ea8f98ebbeb1449bb019fd5. 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/DGA052044727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832a825bca79f749e6c667a819a0d77b452c615ae8092c2ca7a4a5a145d5f5a2. 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/DGA052044724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c7c0461ef3283cc03f8ee67d8c03b08ddd0a9cbaa3e7e855f5e8e45e566a13. 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/DGA052044731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f1ee61dfc40781d52e41a9c13678cc50b56ca0200823afb88cd24cba71aa14. 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/DGA052044729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572484964a9b472c7db2aefb724df577918d07eb5bfd70eff2ea42d3ae4590c2. 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/DGA052044728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d6898576925d0942ead2a24f16a236bab49034587bf2386b148915f686a099. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCADT1882750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef3af462cc9464632573ee9d0226b0a816158f128deccbadfe17d01ac44377d. 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/FRX282213177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a80e2acd14e0be7f48be131ece4394914c7b19179a3798a443ebba26b9c4ff. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DGA052044730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa128bb54504e09e5dd6eaa1ebbe67016164dc1a8a68bffe7ffdac8b8f2e3186d. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/DGA052044722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048d31db012bc7a992c2eb0fa761ba9209646bc245bcfa325a7f83fc1b398de3. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DGA052044725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e10a7332da4a4fc112eac98f3d1e3c6f3687c2d4e9306444aa8f551e09e2456. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/ITB552116509.