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 0x679727b94156bdef170db11d7cc09d32e740ac68ba6170f6984318da2d8887ce. 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/9e5cfe73-e8f5-411e-b948-560311f0e302.json and https://artists.proofprofile.net/proofs/artist/9e5cfe73-e8f5-411e-b948-560311f0e302.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 0x9ef053bda456a993f77cb51681763948cc16c52ee9a0a33723628fe38fb412cc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US7VG1509219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604a3d0a1f6777affb6679053af7f4668b81378dc980aee34019c9c0c82f10a7. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/US7VG1509223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97263b04dd30b36eb433b79a601f81d2843aeaf26b3e92dc2bac52c40256d42. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/US7VG1509117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b3343a13cb441b7f713b85500b25dac64011184ad4b9a615dac851308c3d5a. 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/US7VG1509187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ff35c6ca06fbbee4cfd954f088cd1e2edb58f522ff4cc7e9a13ecb8d00d63d. 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/US7VG1509188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08355b176e6bccacb136cdf1450295d5694cee656fceac4cb77f9673a0c2e31. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/US7VG1509178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56d120f550489cea2dfcb199ca9e9911c346754141c079235bf5ce081e90b3f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/US7VG1509181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987642aa58ec0145c111ea3c3eed1cc7449528c8a28700344efc3f71b3bf3e9b. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/US7VG1509272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af8dbbe7ebfc9fe111a20dcc903c0d4251fae198ad48780f6abb25eb61e17ae. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/US7VG1509275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbfc8b256312d9c09e097d5ff669f7d3b0c9380a56b1dd0c2c711ac5fe2bb529. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/US7VG1509276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d80df87c39386dedfdf0cc5dc08c8ee4c4f14e0f787a082e2ba5312dcf68f2e. 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/US7VG1509279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81032ed7dd2ada720a0655353b8c5cfeea375127f7f3250ba3ee9d0d0e76e6d9. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:06:15Z), 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/BCJF72100031.