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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830060d777d4e0169504b486cbcdf52146cc85d78d35ff710408e367ecc62abc. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2d8ba94-a424-4375-bc76-c17064191ae8.json and https://artists.proofprofile.net/proofs/artist/a2d8ba94-a424-4375-bc76-c17064191ae8.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1acdd98c5cd9bd0afb6a02d8e792a2652f68ab65c27a692d49fedd74fee62712. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZWDD2511805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc3d11d8a72ec11550a854c16a835bd9198aa64680910401b28f637f13c8af9. 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/QZWDD2512765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29fe48e58ddd2a85139cf58881eeac39c45188e6460d5f2b06e0bff217ade38d. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZWDD2513160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3d7c36ade11d013f2dadc88fe9841f07fd985811a89cc16b77d0c59e95769e. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZWDD2513276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92227805e449479615d15e3f83c765b6292d392949eea141570e6dc239b3b57. 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/QZWDD2518390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fcfa97c0dd7e6e3f36a52da5dcef1a0290f19013791526d1cadcaae113eb319. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZWDD2523265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675244125a1289d4ab2a4d62c00d9a9047c12b53773641e7aaf2c5a4a38408fa. 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/QZWV32550292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac54865f8f7ce85a9b0c70c2103c37413f588362c808d5a42090adf2ad301b5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWV32550297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f2b2f063f22f277c7341a6379f1d9f53557036dd3bf1d941638fa54a19d4ab. 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/QZWV32550280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff901f72f6c77ea2aa17f357ee9e463cb1d96ae4a414c376d69da918add0cdf. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZWV32574478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357596922364163b61859678c0156724dd89398549503f00d99370c5312d28b3. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZWV32574505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d968a3152a76e8ba8b66da03fbe2089e496816e271e38bec87d83c3fbde61b4. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZWV32574549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8cbe93b52ebf690e890ecbcd6339591dad23d00d430d85f7f09f867c07f05d. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZWV32574510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb20522e404f9cc209fc9663e1ff44c47df45c2c32e3baadce2578e71e150cc. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWV32574517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a58c9c9dede2a6d15877d8ae25e3b50e1ce5f8379dd706abe84f543723313ba. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWV32574522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4930821f45c91ba44e471c9668c050ba45aacd4e5457521ba08aa9014df34c76. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWV32574534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18a8d255070beae1cd9142595c3282b9f4785a1c9f0f1b8b11ae8f3d79568bf. 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/QZWV32574540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a4cb2139b8f7253d564b9f666446704a9da2fa894a9dd0691576d758747500. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZWV32574546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8edd695a561bc9759929b10bcf1a587fcffad2f25bb88e3e330efc9cda55e40c. 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/QZWV32583698.