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 0x2962928639cad262f633ad8d5cb7986d2588c864bb11707085281b55b8f7f135. 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/f64f1eb5-1b00-4874-9860-b61ca4775dad.json and https://artists.proofprofile.net/proofs/artist/f64f1eb5-1b00-4874-9860-b61ca4775dad.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 0xc3c5dca8e58ae7a3d3f66148548d39a1e01d46c0ba9a48f59a995eaf675dcbc3. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/CA5KR2243664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c5dca8e58ae7a3d3f66148548d39a1e01d46c0ba9a48f59a995eaf675dcbc3. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/CA5KR2243664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06205a9fc3ef08beade0f249abc10af9523e0000cd3ca7e0e703f14a2fde102. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/CA5KR2259596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1152374dad4f18810435c77911fc2d815df10e1194e554a17cae1650063cd6cd. 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/DEH742222121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0f0e77a1364231d63da7eae1727cdb61c53f22cd768326a0dd17a6dcee9a3e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CH6542308466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c2dcc178661bf792af4e6f0149b0732d48eb2395604db9d9cb17d9f0338a35. 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/CH6542332369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf634ed36f044b0fa6b4f0e0c6566faaad17e711b0ed54d9abb096b5b54766077. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:14:38Z), 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/DEH742320997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e6b86b43b50eb689555de59055e8ec9479654a8e2d42a995e746fcf63b28f5. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/CA5KR2405493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36459648e5e2563f484bcb0db70d50fbdcc9e0e36d37e9ef28de2ca903953826. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/GBKQU2418184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a6b569d3b5032d8ba26819295bae7fb126f93c320a07ea260fd4dd033bf7e1. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/TLVEM2465050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03268532090f9fde88eab33c86d6113f823c27266e228929cf87de1bef93132e. 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/CH6542385929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd874f7ee34ea26d29d69494bbd3c1b6212845426c0276450852424dcb6967b75. 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/NLZ542400634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e8c852afd91cf1f5ae96b657da7ccc1038f420c17ed03af3a4348c9b8756ad. 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/NLZ542400633.