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 0x07cd83b28cedb438bd9e4de04033a467d1fc17bea1dcf89c0820cdde9c3d3578. 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/36d8e8d6-fb40-4ed7-92c8-108646be43e3.json and https://artists.proofprofile.net/proofs/artist/36d8e8d6-fb40-4ed7-92c8-108646be43e3.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 0x39680aca246be8adff770841971ba7ea89ffb765227f03ac0efc8f78f2ab0de1. 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/GB2LD1900379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b22f40018d388aff6c39ca0484fa4bfb404ab1c1083054110742771f842f5d9. 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/GB2LD1700135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8cc1845bb718ae1aa6e789f38e0e98dd9e4cbf65d36e5283b16359808028bc. 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/GB2LD1900522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b979fdfb95caa52656d058408872ffc78335e55cf2284e493e6fcc0ec4277c6. 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/USA2P1896977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a3c1049f6b4b2ccf1ee65acee49604d913b36c8e54e9b2b7e7bbb05f2d42e4. 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/GB2LD2010302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78543187b668e4f6f0f75b07203e4a3d680d0e359968d5bbe1f32e4a461e9bff. 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/GB2LD2010194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067b6a3c0112b63a4e62ad1c97f0d728f08c6c402de680368b2f1652e9b8665d. 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/GX4R52203989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5533cbdb55691162a1859508ee064626171e6d2178877e5859ff5ad7c5b74eb6. 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/QZMHL2006810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0246dc799c711cbffaed99792b95f72d4900b275dd02e8c649cc9499215667. 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/QZHN32115810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c62b38cbd47b48a7a74419190606484f95beecf403f821a9fea3011c1ad90b3. 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/TCAFB2046891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d717b5d96648111318c6fb4735b4cc38cd5e8e8851dba71a9ee621b2336785. 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/TCAEN1939991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe707b1e4768e48099c884385e2155d7ef2ff7c8501f05e653c390410eba0d0d. 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/DEUM71902749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1eb9186ce0021f9ea59810fb3d89a8ed81de37a60109840f9232b5b6a89e2d0. 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/QZTAU2305575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7939ecb24de272b281b0795d7f0e6aa5b1a5aa5ae96f48034dff00338aca8faf. 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/GB2LD2010241.