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 0x1c50c6250c0f45684136922363e140ea9028ea73d1c6838fbbc91acc3a8b9aee. 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/f26774db-e35b-4e2b-8323-00e638e9cffa.json and https://artists.proofprofile.net/proofs/artist/f26774db-e35b-4e2b-8323-00e638e9cffa.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 0x29d9fdad3a3bc4b2f1e957c0706160d85296cc34607236d8cde179615aa2a839. 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/ITLGE2200080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6be09aa870754c60ba0f0f498ac29cba95203a71253d93203dc95b7d3d9de8. 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/ITLGE2200076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0800b7a529358ed94db62d35ebc308c2c96d2fe986da6659176eaaa2f936f5f0. 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/ITLGE2200081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863334d35df4cb1bb425dbd9131c3c3cd7f57849827eb59f898ada4861079d8b. 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/ITLGE2200082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcb7f43eeae82123d8210670c21f4233b9521ff911eafb9ec7db0e4976284ee. 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/ITLGE2200083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a85bfc1237abde41d15ecdba75f85dd0890f06afa32c6dabc7793d727161a8. 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/ITLGE2200084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9904ce3580047d98c1a07b89762bc2435752bbbf26c986757b80e844d2bfbf. 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/ITLGE2200085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6c7376fdbba03604c30a97637a8f52da1134c3fc026692383a479dcc76cfb2. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/ITLGE2200086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73561bf770770c6e1167bb9f22aefe455af5dfd61ca3e91c0615c10407960a6. 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/ITLGE1800047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0517b7d2b79f36237b3a177cbe5788e418e1531613495902e5dc3de7e4a606ea. 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/ITLGE1900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34349ee178af092d1b6422a81cfc5a60d20b87dcd1d2162099a1bc8548d101b2. 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/ITLGE1900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b718db4e4f8f1a99773025333b355ed59636825e4a96b95aa5f935d5a53096d. 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/ITLGE1900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46afcb600005c0b2077cbb4619e6d46926fe6fd50f06cea17b721715e39cd675. 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/ITLGE1900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d40d06a29482384758653a5141ef4b839cb6aee0024336aff56b96ab6f70fdf. 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/ITLGE1900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fd498ef4dd6eabeb23b9e91f5266348271921ca6fc42f81b4ae78d10cbb7f0. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/ITLGE1900025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf577c7a90c7a5a65d43ce9eb96f2f8fa753621553e0ed102e404bfebf4159e3. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/ITLGE1900026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62cd42be0968c143d4c1cde335ce361289de7f42a0e6c29c2a1c8bf634e31d0. 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/ITLGE1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20944514ce7c1baa93d74b4526813117d46d48ce992ec902ac1a4853bd2fa1b2. 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/ITLGE2300066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6be09aa870754c60ba0f0f498ac29cba95203a71253d93203dc95b7d3d9de8. 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/ITLGE2200076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0958143d05995065f77a6cbab6feb46545337129ecda6d4fa25dca90c51dc6ab. 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/ITLGE1900077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d40d06a29482384758653a5141ef4b839cb6aee0024336aff56b96ab6f70fdf. 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/ITLGE1900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62cd42be0968c143d4c1cde335ce361289de7f42a0e6c29c2a1c8bf634e31d0. 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/ITLGE1900010.