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 0xba099259ad2b2c0cdb099399f38736df7c260f45eaa9bbd42d65be80cb4bb088. 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/fafa0221-b090-4f7f-adef-d3515e8cadad.json and https://artists.proofprofile.net/proofs/artist/fafa0221-b090-4f7f-adef-d3515e8cadad.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 0xf67a994d05e82af62bf050edf03e2a7f2b9bd904bc9573e5b1ecba216e9c32df. 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/TWA470722013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c811765c690164d38a13fdec92411c4c0a7f98fafebb7f16ec5cc0661dcdbb. 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/TWA470722007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c147e52c9035bca97d991e7c3291e575e316a53b850c641043321d6933fa62. 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/TWA470725003.
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 0xe5bfc90026a6c7cd051f1ca8b66e11c34086282a2c0ae6b733a6cc8c3213c1c5. 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/TWA470725005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ffa7610bf04401345d6a6018916860b903fb53c5c3e7842e5fccc76d2e5917. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TWK230901802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97c72e7058e9e1a193aa1f254df6806a0d4cf6771267a8cd33471dba0eac212. 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/TWA470408010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc575562e3437a2dfd8ecb288f1459934c43df193c23c1496220a069aa01f66f. 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/TWA470526002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27461cfca7b1c68ab09dd2db3d99ffabc5d7043544ebd8308cccb495c3af98f4. 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/TWK230901808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700ff55c801e946c88ad6474a351aa16722d2f22b385517651ef083ec6df7a56. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TWK770801003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b92ff5443409f12ac8cc14592886aa99c5a302e7a79b562b0b50d6fe697a44c. 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/TWA470441001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05909a2ab0acd1c8d7ef44aa965dbdc2008579972ce03522c71f6c1f1e5ad33c. 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/TWK230801701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f41812fc6d277cb8e12bbdd9286976c879204edc88cdf5017c78734a2a7b6d. 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/TWH610766003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0f865bb207a305b76147f59566d17a8fbddd8420d0665f94511e0ea1cbbd8b. 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/TWK230801702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb780966d7d9d4fbc3598da7f40dc5314bf7677421d642c155bf2804fbc8fa8d9. 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/TWA470904001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d7d715e3df28409f87a722e68a9548d9ea5e103f8b3b982e2ffdf2fd475ac8. 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/TWA470608001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3380f55f7f3100d2a7b533a9d5b2bd7e5619c8420041b1ac38b9cc90c05375. 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/TWB730610001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8280fbfebb1a092b70d617957c2770d75614076d80ced7a433c6718ab3a7977. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWA470608003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740b67c0f07356bde5a9db6f838792a5a727fadae35b2644b1e469f85b36e01b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWA470608005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6103432b9ba5d0f037cb284300de0ccb7fb6194f67cdcb04f4957ee01208fed7. 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/USSM11203181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84711e95e98192151d522146531d380d4d0966ba3a93f665716a2f9817f1941. 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/TWA470617001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48931584b2368047fdab87e9b9c3db783823322139d69d6ae1c0248f12944c59. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TWE210603111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2203a010228ff9a2cbe35378f204bab7d83210203f634a7773287cf66d750995. 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/TWA470618001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b144246f1450259725faab989b495060cd69d5b6730d0128acf2d041dd122a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TWE210603061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba567c42bcca96640375a5b3fd1ac3ce178e99f8727f672778152aab77f6f61d. 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/TWA470701001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8205a57717968eee3ebc589ca2410c55b904ec12a15f6c8987af092b98de673a. 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/TWA470701002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf27a698d3ba167e0dc83bcd1c0d398e1a82b2b9f6ba32f0ab4b7ba7c21b19e9. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWA470701003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf124208319b21e981dd3d92bba44ef1b5eb1cb7c9e2296ba59d240b4b03fc9. 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/TWA470701004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81517d5b0a79b62453e1e9afbc0e622afa52847eb7a7b3fb1436450b394da825. 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/TWS411500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb80dda82d8dfdd8d4d79e02e203f3bdc6e66d087869de7cf1c47ef4b263473. 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/TWS411500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce062cb1c0137f2bb2797f54ce3c1fc51146984972ad16962fedd52b1afaffe7. 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/TWS411500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57b16b6b0d8ebec0fa1db1d39abfd8d547e78ebf01b09467fca5b93c10a2dd3. Chain 2 (Bitcoin): anchored in block 957242 (2026-07-09T01:00:33Z), 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/TWS411500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47542bfc4e7924646943a627748f3d883c5732a5ddedabb8f2b5c8b3d9dafb1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TWS411500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940aabd9376496a200a2508c118942d5cec189d7a57323c38735aaca94de4db8. 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/TWS411500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fcafab641b48f0d51d5adf50d1fe1c75dcd2bb4547564c5a22c5077cfa74da7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWS411500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d026cedbefc81b57fcd2eddb401a1d679e916c7efe1a6db81e92a43dd8634f1. 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/TWS411500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e0a76bc94acfbf88f73ec33437c4533a5a1ab36d02b2da9e175311845220a2. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TWS411500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8a888d36b6fdc2ee54ff47e460271b9422c81d8307f3f781f1457cc6027f3f. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/TWS411500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb263fb37c37b1c278cece1f8d3421946e21c87de9dd71eb707d0f5ad0bf6ec39. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TWS412000003.