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 0xa2b83c9a90054c0e6b3a19ee0538f08153676084cb4352b93b282d2b358d90b8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/186b03dc-d5d9-4eb1-8da0-04c20f1ce291.json and https://artists.proofprofile.net/proofs/artist/186b03dc-d5d9-4eb1-8da0-04c20f1ce291.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 0x1c1d4e7520743422dc3cc0ee12eb388b5c53b8dcb9744a0eb131d9aff9d6d9f0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTVM2467357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f90f4eb8aee415fbfb02ef42279f5abc6317fe066bdcda77d2a4e28f6097d4f. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZTVM2467359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5a5ad8ab357d9f02cb1f2afef4ed5c053526b2ff471386702ffc3d820c4aad. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTVM2467361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532dfbbb490cc7810fbe6ae3250a4bb844fe2c65b68a95844b8adda521136dab. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTVM2453380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24576d90f0c5348c6149325f86859599287578e4f83bdc5a599e1ccacebdcbb1. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNJZ2474127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824106d9c4fd05f3e62f8932c1a87d8e6cfcf3cd738fa0b72de3b842d2b180c6. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:09:23Z), 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/QZTPX2437067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73588b70ba77d9838240a784872e27f754b3f0cac35f8cffeb66957a36af59e8. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZGLM2502637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c4fc4813172190a4326df01fedd586b1ec97cf93c2d7c1f49a45e6f5ddb533. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZGLM2568692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b80b0e839f6a4964b31421978796e5aa422f26478ab1041bc10695f4a1d9188. 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/QZMZ92523000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9875a427b9841e5cb6fa22d864cc0dd4e335819f20e9cd79c388bbcd44e1a82. 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/QZNJX2557321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a5a92e718196121caeb0673a6a502cc91a3e11f705f921b50c9aca9bd50ecb. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNJY2541614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ad1a01e89db3ec3ae89e226f1c8d1b69f6cf936d80fa898a8b6e9aad972f60. 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/QZNJY2588222.