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 0xa3d99512a9a8137873c6b0c05c59e7bbf18c72a3129870dfcb1ba5fdf1b7e655. 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/e4bca3ed-39a2-4618-8aad-6150903408c9.json and https://artists.proofprofile.net/proofs/artist/e4bca3ed-39a2-4618-8aad-6150903408c9.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 0x6b749d6dcfdeeec4357cd8818e798bd0b255c563ac845e0c48d6eb2695eb0c88. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TWA450893502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b48fe36e3ce4b2dc213ebb32b8472c9d74bd52749dafd49c86114cf3e15cab. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TWA450893503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d16ae634d010691ce703e7908a244c7fb2981d217187d670ccac5c09a2f06c. 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/HKA610400958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe64493b8a5d4b63900fc9740222b52c9133dac3a06b3a7d8df4ba64a249cc9c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/HKA610400959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11daac9b125eb01b1d04ba1b87dd24a84d8cedf66415f16083ddddf4aa5c63db. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKA610100094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e017193ccdbd94654e2c7de0c12b0453390c35a4862199ff07c0d39af1101c6. 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/HKA610100101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96640730dbb1ea949c02591cb8de66df41c580f77eda4332c8e200736b312f5a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKA610400955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755243b66e6bc85269f537c2e8287dadf08ef7e756ab2cf8723da6c2551c7221. 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/HKA610100562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e1b4ee0865b33054ad1605be796e535356c0cea5d7bdab7834c8955256a389. 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/HKA610000881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f43184c69fb86c89150e988516b8990472f3231257230f44e3752874fe9f60e. 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/TWA459440806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e8d06ea427bf12739f12cc16eb31011782a9ea601d28780812992820ed2361. 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/TWA458500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5704bb87817a6713765737d94138ef40cac20adb1b8539a772324c8ea50c7a1d. 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/TWA459548103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39e260fe45532f33c92edc4dd2ff010e0b9b0e4fa40155481efb3db67459a2f. 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/TWA458923206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9445bfdfdfc33d710aab21ea17c8a14f5fca3a3842ba06565bfbb6fc94fa84a8. 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/TWA459650201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0669ddb39ccf8b0a1bb2ab3e7489347a5f98a5d5ec139832d9528277b58973. 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/TWA459440807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f43184c69fb86c89150e988516b8990472f3231257230f44e3752874fe9f60e. 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/TWA459440806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a90017c67fc23d1a06552095d47c96a8448b63292cae966620f163e73ebcbb6. 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/TWA459547905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae4c320fa8415da382f792ec1cf9d246d9088d1d8dc67f8388120743e1f8160. 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/TWA458612301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24442f88ba1085d15dc0b31ed28d326cf5f669a789e6992c9877b07d890737d. 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/TWA539772010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e5b95ece9fe3cb66dd73d2abebc95ac3c15f5d7b078bf4285a768868cf2a8b. 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/TWA458817502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58efe7f780251996927b165348fe0aa2b69d13c7fac61a5bf7a13682f531881a. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:06:21Z), 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/TWA458817510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4956273c95efd09d85a9ca3a0f0901c608ceeaf8e97da8e2866bed28f88209. 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/TWA458816703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506946d4b0ff1dd393dd8ba34fed1c3105aca5a38d08f0224a7a34bcdbf1ba74. 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/TWA458816706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67b2ea572903c7132abd95919fe160e886e2abccb5d7708bea359c3aaaaf82b. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:03:24Z), 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/TWA458816708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44b938955757793291354544e06a33a4eadf666cc60616e0d2372799925555d. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TWA458816709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f040532dc717acdfd2ae2602ffae87692f47f1e2324988a3099b9515167bac. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/TWA458512101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73513da5ef2ca6ca72dad164822ab503d9dd1800d4feb02a940776d6da450c3a. 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/TWA458512102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22cfc4f0daa4366285a91ca66077e9032fd639cf332c0b5b60c1253c37d9a946. 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/TWA458512105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1737e019a14302496d2e40b281239ff01b6b775a84b6d32ad11800217899c344. 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/TWA458512107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea40791a160708e97fd25ff449406735621cd64cbf26e1b25de0e3dd0aaeea6. 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/TWA458512109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec50ec605fc1c9f9f64ae86c1994cb4dc44a6a095b49ff9a58d02e1dbfc60e7. 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/TWA458512110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028d527a8a28eff57733182fb13a09376a8701c57031c3b6de2e4c27a0a1dc8c. 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/TWA511300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d9bdfdcc3aad194622b2be95b68fcb1fd0d2549b295e85b3512a0d16e0d0d3. 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/TWA511300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f75ab14be4324ea3cbfeb557425d0a58165d8fdee398643232aaaefafc05b9. 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/TWA457901208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3799c85351574de862a7863df57982e7b8a8fba6b8a8c9043e63f28f57d59ee2. 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/TWA458713601.