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 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 0x3a00ef29127ddd7c3cf4289a7f8f38a971f5e77565be7be5e40e91708f950df7. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9bbf5c4b-a157-4356-8e8f-be10bc2a8e5c.json and https://artists.proofprofile.net/proofs/artist/9bbf5c4b-a157-4356-8e8f-be10bc2a8e5c.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 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 0xda6a52094ebabef2bb484f177cffafefdfa8bb292205b8f038b5325c451fa6ff. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/USA371671111.
Up Where We Belong (De "Oficial y Caballero")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1646d95dec07ee217082a3a2935f203d7b7f81d8812a257ed8e4aadfe2ee16. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/USA371671119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474f89b16ae8612d8a9a6df44c3c55505edf9c6023e7f5ba6a9fb6bd7d59c70a. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/USA371671130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131f74b240e1e2a187e292a980aa7061e6a70668d972796a2eff56142d3fe439. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/USA371671131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d237676aefb7ae3f0e7c69c287d2262759b5cdb097974b048f1d167c5a63e5. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/USA371671132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c773013f2bc7facedb265ae3ec94957a42da1e355baf373fb24b33b4c8341bf. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USA371671133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa948f462f5a9595bc85b0dff9b2cc2eddda58aa192b2ee926261921c597e9b99. 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/USA371671135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa198fe6a88770ec8f38153df8bb45fabe51595cdbc378db58f721bb14646a508. 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/USA371671136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab309715e3a163acd9815bc6747aa1dd4d114401ac77a1445fccdc76bbc15aa8. 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/USA371671137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6778f89ce750078fa8c02b3f5b819f44e8d8beb9504dfc4e6781d2ea263b71. 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/USA371671138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab8f062613bfadc7ce0f97be64a7e27d61c087d9495c06718a708ef645cd9b0. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USA371671139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda13e36136498593ecefdd562807586c546326eec30053fbebd43acf80f1641d. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/CAM460423492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c162aa5a053e086bdde3b76587b5d24a8ade62798fcb704c85b04af7daa0e6. 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/CAM460403667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8db9eebf4801db25b098b6e2fc7b3d1f62ba10dc5e4a03d41717a56d9c103c. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/CAM460416797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce85a60dfd8e38079538ebce734bf4a2cec416c01be3e5cfacc376003add595. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/CAM460403843.