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 0x4dc0a4ea81d4426fe15c4734ceea9839122c2530dc2a3b379e2552ff4a294b7e. 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/2e125492-11c2-4d58-9c39-f81598a5ae80.json and https://artists.proofprofile.net/proofs/artist/2e125492-11c2-4d58-9c39-f81598a5ae80.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 0xf36cb65bd9f7f8ed74e556553a1f9fe6175778794524ee26d9d3568e9e0eaa44. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:40:35Z), 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/UKN6K2200969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60de54dfdc829d28f3c24b45d4f44e660530cde73c9f2b1dc6b1a474a81352c5. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZS672225955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc8c3f008e98c7593eadfcb45793a2dc735b1121de7f38702ce75bd56b643cb. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:12:28Z), 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/QZMHL2211473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98842d7194e1379ce5c7972772020bc0a702606eb6fa2cacbc23d13aede94f47. 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/DETB32302727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692ef99ee6e21e56456c7f9ed313f9479d9b62c01ad1d18bdbd85689b2ecf761. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/DEZN82363913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13826dba470a53158005cb035f83153b9803f527dd518c96e39ce8659dd0a470. 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/FRX282479343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706d6548c13fa786acc25d4d778aff2dbb44703f331d34f067d4149ab6b686a7. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/FRX282479344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cdf9693b175ce120029a73f8ba79c216d9dc94e1b2e539466519a445fa88af. 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/BEN582400483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc147b29128208696f4ab5871a5b0d9081917df01000bfcbec4aab6dec568cb07. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZZ7R2422916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2a4b595091096d8a059d1288d7953b066341a30eca9caebd29c431090566f8. 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/DEH742302157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6402bf7ce0961c51d33d965b21bcdaf4526b3e1639321ad33911d4edc56cb72f. 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/ES74F2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d4e3a1d2b110c946aec301b887001da42b68b48c34525e66fee39150b46950. 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/DEH742312835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76780ad3b3282e58cc7a47053e19bad68078265fbd6013af4cd762ca96db2c85. 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/GBKQU2459877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472472c2b3b0a779dff0660836331f4abf7820dcad38d8d927d2dd1a5d10ac41. 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/NLCK42408321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cdf9693b175ce120029a73f8ba79c216d9dc94e1b2e539466519a445fa88af. 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/BEN582400483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa0ebd1ecbe1b3b8117f76e435385e9bd58979181e9f755d1e2d55657ad9dc0. 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/NLCK42422496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684295c8f6bb7935c08243e6a8d107a81337bbca6d298394870398b1d3a72c82. 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/DEH742431569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb45ff57d25fd8a3913bab5045337a79990af5f1bc2db5606390a05be87686a9. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DECY52300142.
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 0xe1c4b6598afdd52652f518c71fec5d317f90d2a19560d920081b30b705077a1c. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/NLCK42233140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe63fb3c929aad6cc8324278cfccb0d49bb05fd127e7367866bb5db001a149c4. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/NLCK42218769.