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 0x9b233721ed8f15296066d3190d7b8d7917267398bf9dc854ca4b040b99f2191b. 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/04b93c3c-c5b8-4007-89f0-90cbad8322c3.json and https://artists.proofprofile.net/proofs/artist/04b93c3c-c5b8-4007-89f0-90cbad8322c3.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 0xce8b372f9d5e7a0a6799702197f114ef027215f7cd70cd0b58c5c16bfd3fc340. 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/SMRUS0076884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5da732c2519c17a53b6e60d2aed3eecfab8e78226936ec771281e9625f9a1e8. 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/SMRUS0077508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03c1c534f311d2142fb535ea61657afcdfec90c0d26ac4d40e8fade33e4f82f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SMRUS0078290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67ad453d349c79993b93675ea61d89644f5b08776f1957602b07cd3559500c5. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SMRUS0078444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afdaf84ff8685e7f78f4c17705b6ffa54f120494180b5a7f9f5c780df2a203e. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:48:26Z), 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/SMRUS0078640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4bbc76dd65f6545693a614b94f3de0526f477b41dbcb2679951ae859785877. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/RUAGT2524837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8295bf7656b636ab00ecfab9582a93d7d6ce49ecfd9f5cd86025250dd62c9ec3. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T01:00:44Z), 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/RUAGT2524840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6b466dc3fab22e5acbd53e57956631763d2d640374b55b8649ce8d60be21ef. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/RUAGT2545402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0f20cc3ded054fd25e30443cbb22a5e76fb32462fed1890132b970a376bed5. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:33:38Z), 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/RUAGT2585910.