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 0x745aa13ab5318fbe4705bcba228c468816dfcfdcf45f4f88a23561146402e671. Chain 2 (Bitcoin): anchored in block 954553 (2026-06-20T11:51:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/abbd56af-f63a-4dc5-9e84-764f317341e5.json and https://artists.proofprofile.net/proofs/artist/abbd56af-f63a-4dc5-9e84-764f317341e5.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 0xc02b446c1d27ac41b0e3e779752df5b066a98a577ee14398a73e65bd6ce08e23. 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/QZTB52570494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7e264b51616cbe7c467b158232b9e628786ed5b26c725f864c2d274b6bd728. 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/QZTB52570497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef7c6e2d162fd551655257eb33ccc137c8ddc5312609a5fa7a5f02b942231a3. 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/QZTB52570500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5423379e7ac08471b63c5d96bd9617a5203d92a73bb280ffbef35a6e831cb9dd. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZWFS2594881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce634438949eb2ac49b1d81ac931b6edc1a3864c6448335d576d7127b6c1c534. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZWFR2527703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6500801fee248f1a995dc6f4cfd70ee6a872382e1d129692085e7bad25db14a. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZWFR2527704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4bbadff39b45a330406638a9b4173a70e1e14cc91106ba24060f42450cebd8. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:27:50Z), 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/QZWFR2527702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708fdd6d144afa965c27c4d1233b49c5d2b1bd8e9aa72b6ff0156b7a99c5f48d. 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/QZWFS2594882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66787211161083254d873206d0287b1dde855debe2c3c0b512997da4f4c1d92f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZWFS2594883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3c930c592a84196171c4b64919a9e04752eb178675e3c2f3cd6994d534c303. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT3FE2586400.