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 0xbf7984d8378a536882098b8c006e35cbdd8d368ef5eec25ae19f758f0628fd5d. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ad3f98d-4ced-4f4b-9e64-fa9c8fe47b41.json and https://artists.proofprofile.net/proofs/artist/4ad3f98d-4ced-4f4b-9e64-fa9c8fe47b41.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 0x135a694c3769c13f2b36fe32ba673cbf852e2548cf2055895f593c9c79814eb5. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/QZHN92394511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5652d0237ddac6a5d94fec85374e9cac4c10cbf4ef86dffb1ae61cdaff28a03e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USLS52348301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94c6fdc5bbf155f62392c7cc13c45b99e9d0937bc9e0dde129369a4cfab765d. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USLS52348302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67bb52ea68b66b272ec5b004d14df7fca879a059b81c3f7a5d2abf9ccc78b26a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USLS52348303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19278559d119c9a1c3dbd023b5daac7cd3ec19465328161fe6e5a34dbbd8882. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USLS52348304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b96921d72883c78937f1949f795cdc1156f9cee54f32a7d104beb79c6da336. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USLS52348305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94d60313695cea023c704522b4f13f2b6cc1e8ba3d9311170930d63e33d1687. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USLS52348306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0546eb25158c01256f559358ae0294125739f549491664ddfa909d75dc22b529. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USLS52348307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf278bb55735487a47c19fa794675ea4debb9978ede95443d8bd19d85bfa62928. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USLS52348308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50470f51e7b7a3346fc40dd4f15471e6c2486294866344557073bb23d0dd30e8. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USLS52348309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5451db68864ae69e95aa1026d511abc26290f2f2a8f353c05ae98c51ec77a4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USLS52348310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3bd8e2a5f40ef98820923b3de2f997f8a540051383c48df4d9eb1a442ba8cd4. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/USLS52348311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed55586bc9ea94128e69003857da096cf1fd5a324fce472303acd4187a2144e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USLS52348312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fe21660456d12c801af9267b7a2d92ae5bcb8c3bbc01b43e662c3888e795a6. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USLS52348313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff3553a7a4256d01fd932bb8ef01b5815600722aa3bb9654b694cc5d60e9de8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USLS52348315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba867fbe6ab9655fa12472308114b36608e9d00f0e2f92cf83cabb6b5af85f51. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/USLS52348316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c2db3fd5b991aa95949abb400715caf30df85f9a7a00059a2dd949a5d9de11. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USLS52348317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1f96bfb4987a5ff50d457f51930b8d3fee3744df6db94e5d14c7f9bf7c37c6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USLS52348318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7ea254a0ecf0f4c254023f78dd31d3ad36d15af8e4c8b60e06fd95a5248534. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USLS52348319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9deb5a8b160b7f74ca8dfe2701a05cc75ccec59bfee3619ff536145c8804b2f. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/USLS52348320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c79d8547b289cee8b5b5a20d14d396dc572046d457e1954094a1d44f78e631. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USLS52348321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354c51df2ec3e080774d1fe1f85a71e5588a07c1efbd1a031c0c4a5e7bc94ab2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USLS52348322.
Match in a Haystack (Original Motion Picture Soundtrack)