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 0xe1943b911249a72b3d66900d09cc26bbf8ca21bfe8c77f09139ba8b3e6bd965b. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5c8c517b-10dd-4817-a5ba-21b293116f63.json and https://artists.proofprofile.net/proofs/artist/5c8c517b-10dd-4817-a5ba-21b293116f63.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 0x12ddb0d65cd918addad5f14ef65fdb3dd731f036a64571cdcdbb8091bd73d2cf. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:55:01Z), 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/TCAEI1929371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd532dac2ede4bbacfdff1b347c2aef42c5f141222099b44a09df4c9fdd9a2bde. 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/TCAEO1951215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229cc16dc38d8af27c6f24bf1797ca7abe489b04b1c64e6537ae3ae60117c6f7. 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/TCAGS2234591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8f6e144b8f29df6cc8e6404d7cec5e6b286c2442e858cc7ff34974ad38ee28. 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/TCAGY2336929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a1c78ec7d06359be826386d44f82b2c1b07852a49243a69c577e4426dd59c2. 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/TCAHD2360452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ac75fbc0a54038fbd16f8c9e42993153dc7ad190c653a575a87f073fdde34c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCAHG2305755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58bfb0d19030c39b2b82c970ea9eee77229eabbb819c3d9177c527b98a1eafc8. 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/TCAIX2404943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b697b3a73a9bdaba86bd3042d40e8ff23f31d6c7403e7ead1d35c78fad6c23f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAJG2515294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94643aae157eef68c9405e0c53a14e404ad765b0ea94617d06c2f9a8d549801b. 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/QT65Y2505609.