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 0x9e86299ea85bb5882727db05440700e08d1d7784ddf876b7c843ae560f2e4ffa. 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/072a9b9a-bea7-4b4d-b684-2f61aa71acaf.json and https://artists.proofprofile.net/proofs/artist/072a9b9a-bea7-4b4d-b684-2f61aa71acaf.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 0xb4c87d0386d2fcc8ad603d4fa17c4b892ea3f773b4dd69933e839a3b6a4ef498. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCJPH2569328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3386108d94892ff4d9be2ff9d7e8b59163a61d6d30de172f2d7be6264505506e. 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/TCJPH2569329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2dc5503e6cb8b5224c1567111392ca1f027408e0444d70de191a1ee46989b24. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/TCJPH2569331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd782b46af8233c07732999c5e60ceeb346336f4da9b53b7e5313eecfd31a9bf3. 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/TCJPH2569333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772dedea15bcc22ce0fd33b8012a316b894fd2d5b74e2508e50c4868f99a2411. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:10:00Z), 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/TCJPH2569322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d596fc701c5c0b0de2a01b4860d0943f01c0ff1b251efedbe04eeb6d5b0834. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:23:57Z), 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/TCJPH2569324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18621c0c05404306dfc469d7b2b3a8902cfeb7e945a3afc159838777c186a07. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCJPH2569325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175c8155ef3ac887531680ecf2f3f26e86be8452202246a715f6e90c6801e1cc. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/TCJPH2569326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8bbca2e433bd2b982a11f3f1e5c5de80ec576cc209f3c910f2be17af63a930e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCJPH2569327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65b81f031a19b2099d4641c17a1dd923b512df66e61488486738bb08b6fba6d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCJPH2595464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5b7ba1fde7e94095e9e5b3a3a3106ede4b7e45295faede124c99fd5b9adc7a. 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/TCJPH2595466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020f405a6a7336987b3d5aa203149f6e4ce873d037db5384185ed76fdfebd552. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCJPH2595468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95943c56724e16a841b1fbfba07c6b29845ee12804dc7dc36caf5c0417a8a53d. 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/TCJPH2595471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5512319c969d50a261a10ff4774ffcc9a4177d23af353d8fca4bc8b830019fd6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCJPH2595474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb321b57b33cc07f45b4b13820e1ec5acd75c21f60768660cd1f54ad2218b1ffa. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCJPI2511627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37af6a3e2b25ec1732028757f8576bc4c9d23bd8ca714a89422a8cf6760928a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCJPI2511693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0b69e181f30c71896a616cd15aa442325420f57ba104eaad53ad780d802beb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCJPI2511750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae5b5935de4ea8ba5e7fa76a000c1f3a3384173c82379802ca2dda8c43530c8. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCJPI2511753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60e8d07952589bd9d7b9aff169d6ed090d20e2818eef18f9d9b93f21fd90066. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/TCJPI2511761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4bb59b20331c8e0bff010f4e4a0ca698680a8ea7712a69632cef3671b022a7. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:46:26Z), 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/TCJPI2509769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852e62c2761a0de7cf90f59ae3179290ab91c76d96cc53628c3a6e54e06dfb0c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCJPI2509770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c69cb7f06d64dc4838750339b6ea5f45c38662133bd19f4cc5fa4dd5b4a382. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/TCJPI2509774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1020b21d06a83a8c79b1eabbe0ce4974fbfb211fc60fbf293813cb3d055b84. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCJPI2509832.