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 0x82feed50410f65e86583513e2885d419062eeae1eecd7bd902d21b9863936930. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4b351f88-7b60-4745-a027-eaf4a51c1a70.json and https://artists.proofprofile.net/proofs/artist/4b351f88-7b60-4745-a027-eaf4a51c1a70.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 0xbd39a70577dff1ecc7d6908fb6a092ad81b679d74e449caef39fb1c8a9aa0b92. 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/TCADG1725040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329fadcc44614a3c3a52b59f324885b83c679cff0106a85bbd2f432010cdbb8c. 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/TCADG1725044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb737346734901c7869455f6a54dc7dc4516d0b33551a9f00cfbd40de8dbf6063. 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/TCADG1725045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8cebfa06c21872ab5d74481cb013d8995b0d516732599e533e63dc3bc5d312. 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/TCADG1725047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead78b6cf5a0fc9c43f14670da4fb37460b1e0124636e45ab84dca3f8c58299a. 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/TCADG1725048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57caa31630ce35733794b3e82eab382e8ed8e6964c02aa9af1df27923f1738eb. 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/TCADG1725050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ea2dfb6b4c22b61a18790a1f728f366e4cc7349d051b750109e1a5cdbdd640. 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/TCADG1725055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f145f5393745321af922a177fff773b7d271fbd26760c0beb9ba725afc6161. 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/TCADG1725058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9baf45bbddbade7f129bd78aeef9fb205de03d8737cea67b1f19909980ec49. 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/TCADG1725059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ec2a9497477d145675469db3a68e6c3472510225adede9be31236fe45e349e. 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/TCADG1725076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6aec114b1c7b36d33267289232c347cfd773f8eeefd9a0e9d32d9a67f3474a0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCADG1725078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ba9a8b91e4a06e35e1e9dbd6db1e9b797b11cd081535a7b501ff8899830d12. 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/TCADG1725080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b9526a6dd4f1c9542c94915b0a251ddc9a9ca461eebb57b9d9154deb7f7c21. 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/TCADT1806887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f246d79438cd9b576082a250036b8fcf86b6fea9f6cc793eb6920bf0a0b105. 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/TCADT1806853.
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 0xd9872b2f82dd7bb9905a237acb6200d424b5e663f612ff276465728faaee09bd. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/TCADT1806882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a76f1628e9d4fccf620671763713d02d34adf700206cee21c76b4876aaab171. 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/TCADT1806884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b7f638c80403555254b156d4319bd388923a58ebf2a2c44f23e8b6ead5ae4d. 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/TCACS1666153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa246a55449ee75bd7d780df93865967fea6b2fe29d4731889b825007ef9b6974. 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/TCACS1666154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab5ba1c35c5663f618ad13a0b505fc3c898f06369f66ed08b69c48e99c7d361. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/TCACS1666152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19443cfcdbe5ced373331ec1aeed7bb0e850fc9d4a5a6b4be472854a548e6cf0. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/TCACS1666155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63266bb5fc50fb6df808a37e69c9494adda3e2f6dc7409e159d90fc1e22f4d46. 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/QZBRF1873564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfd6ce384b83bb0ba204e5d3ee2529d6fd0736ccd7446ead1025be26fa326ac. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/QZBRF1873563.