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 0x66d61d3934c27f356ae241bd2b06d94c0277ebce725fd86336a9f14b866946ea. 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/7dae8aad-4f68-46e2-a5bf-abf45edb0545.json and https://artists.proofprofile.net/proofs/artist/7dae8aad-4f68-46e2-a5bf-abf45edb0545.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 0x9c59b0251f6ad9dbb0b8a6603fb69da098a9d8431717a81c600b89acd885a9ae. 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/CAQOI2402803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125d6055556a04b9467767a22b72c420d44b3714c8b9f5dd42912e66f7d6eab9. 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/GB8KE2316601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6a09bc6d890bae73aa2f9489af9dd32fc203f0632fd8f0e2dfc12278740804. 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/QZE6V1810030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a33bd108de749a4d2ea4583abc7a03953fa0b9580e69ab928a524121a46532. 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/NLD682300469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d24e9c386282ce435364d44e091f70441bc2e5c36b13500f253263fcd58c9a6. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/NLD682203504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1dc0122dd43f8f0913a214e10cd151771514efec38541143b8d63ac5ef5ffd. 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/GBKQU2132642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb63ecb194369c6d3a520bcffc60d5922f1ece75f21edd2de458d64332e2985. 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/GBLV62038743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed430c578ce04c7cc5455f3a92c2006615e84a7b7e47c6800c201386b8026d4c. 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/GBLV62038744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266328499bd0bac811f53df22574d7a93db7c1925df41dc9885bf6430551c96d. 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/NLDD62400177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbb1bd56797893ecca2cbf58fc325c4a2f8ccc731a1aa19fdf7f8bf5686cf1b. 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/QZTVM2161972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b8d9ba6e169b0e5f8d9c399fc1d6806bc1bc0bba1dd9463023ac9a58f0495e. 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/GBWUL2180929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64eb445591695bed5e56f3ab4c6df5bd3c65c1be215569272eb06c96ef57d7bd. 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/GBKQU2170326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be0127fb7e5242cfdc382e9e37a2e9532a7f4b301b75694c8dec8a7e44c8d71. 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/QZ5FN2383535.