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 0x360a1dfd70ab66b32844bed2fe36b9d5672d1364fc43626fe8be99fbdde9e14c. 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/3536af19-8cc2-4537-8914-c8c475bd8092.json and https://artists.proofprofile.net/proofs/artist/3536af19-8cc2-4537-8914-c8c475bd8092.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 0x09048a051c4c33379934d8e82aa90cbf21a8f068d2002a61cec5dabf24772b16. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/RUA1H2333415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09048a051c4c33379934d8e82aa90cbf21a8f068d2002a61cec5dabf24772b16. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/RUA1H2333415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb0523b6fc6e29bcd67139a7a7e1b65191b5d80ff8987fb773ea85dcc13b934. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/AEA2M2346981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb0523b6fc6e29bcd67139a7a7e1b65191b5d80ff8987fb773ea85dcc13b934. 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/AEA2M2346981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277342ce04db94d359d23853811fc0600a07cda4c53d885139ea6ad917d41473. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/AEA2L2370118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2264aae99b8dd299b4960d7cb20bb7f4291344b5587a4bf109d784670d5b32b3. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/GBMA22417959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97206a378ad5a1fccdef6cd6ab22c3393c08c6cb6d91b0d6dddf8b6a95811c5f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBMA22417960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841a301a97364ea1fa579a45e9001ef75ec784505846eba14a446a3326256a90. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZNWT2451662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8bc97de08094b3a2bb167de7f645b5eac838ca1e10833eb8f1097ed5afab224. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/QZNWT2481321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d1dcef2c8712280c5c6d3a832e0831cd13e7602ed296daf34d0942c0ef3f02. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/QZNWT2475595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864d1b59dc4d226347e1ed381687e9d35a02ec31d8515c824447b3a3d15fd6bd. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZTVM2463666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fa6d48713d014b2ddb1445ec03a5659e4b9e2e202f6f28e2b639ebf6cad393. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CACWV2532846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f1b7e681f75a27ac280cd333a47ef0868dc4a21fca776094a5d07b22e58266. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CACWV2547444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae686fe6e7c9d7e950cd7c9ae4eb2581a8d907ce37c977c269b0eec5ddd8c31. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/AEA2M2482538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d16303db842d9b99d03a436d4ba80100cfc41333b37a652d886a967ca5aa17. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/AEA2W2419248.