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 0x272708c40b38f5dd2641a8e9dcfa21fc9c6bb7c490ca710d680fe7d91a93ee9c. 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/4f68fea6-e17b-4021-b6b1-89d4162e5096.json and https://artists.proofprofile.net/proofs/artist/4f68fea6-e17b-4021-b6b1-89d4162e5096.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 0xd7916c0a016d761b1f85b2676cb4f96b0f34f27eaf5c09d434cae59432027caa. 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/DEQ022009667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ac1cf8a87933f15463efe0c7d538c77372fda8f8c90ac384ece50d76a126b2. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/DEQ022107691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaee65e5a8ad13c4fb1bb20969a631c16b8aaa013a420a39afc5420589e0a63d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEQ022009014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf76f5d6c4072fe2ee019e39dd63db318470d926fb95775dbff1bd0db596b166. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/DEQ022107684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637325f392d89216e823d0b4cef1bf4f8c964399bbf8955e5188abc5337e9862. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/DEQ022107685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0528e3de97e69dc988c527b7b68343070f028798e02a0c912321190fbabd8665. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:17:43Z), 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/DEQ022107686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228aed0f07108145ab4188abd654ac939958ce9c3324ff5892b3247c4efdc8a8. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:01:50Z), 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/DEQ022008803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7916c0a016d761b1f85b2676cb4f96b0f34f27eaf5c09d434cae59432027caa. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEQ022009667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa889f576dda3bb098ac10ecdeed47b0fa6eb82c9cc598a3ee1446369957d1755. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/DEQ022009356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984108daf4581656409c15831371171d70a3b39429d1a9433ca13590a2e462e7. 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/DEQ022106050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fd7223e26bbcd49c33db20dd03fbf9c831602b7994c4f3151fd57bdcb70fc5. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/DEQ022113026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620ed1a813f1b3fdd790f4ab02c0069023e8ee41d51e73a9f27f83a400f21056. 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/DEQ022113030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620ed1a813f1b3fdd790f4ab02c0069023e8ee41d51e73a9f27f83a400f21056. 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/DEQ022113030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb8b3ddf389f10543dfeffb8bbcdf60b7a7fd831e4d48cd57a238d7472ead43. 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/DEQ022113624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb8b3ddf389f10543dfeffb8bbcdf60b7a7fd831e4d48cd57a238d7472ead43. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/DEQ022113624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06fe1f58261030326915bda0bb3d10c8e79d9cf52eac740fb6cc5b06615879c0. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:00:28Z), 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/DEQ022111486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06fe1f58261030326915bda0bb3d10c8e79d9cf52eac740fb6cc5b06615879c0. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:04:10Z), 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/DEQ022111486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd68cce0c7bea2a7ccfe14cd39d4696e0b048c31e9b4ef7b3b3fb35be290d37. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEQ022291189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1d4f8c8d1194b10956442537cf17b9fcccd74055b4c7310309da265261b9bf. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:47:24Z), 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/DEQ022273434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe894c0dd31730f8d49a2387fa0c2188d3cd382f217964dfeaac695988fa7d8d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEQ022291121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8a7271e45af8d09a8ad530647c48319db857a747d6d4f8bc027b9d8c3f5903. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:18:21Z), 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/DEQ022281802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ff523ff25b9e08a6b6eeb8fd46f7d372fd6f93b7ec801c1907e78326630dc6. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/DEQ022272744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686be6af47f24ee0963c060cf8a277a8482e90de76dcc92bc4972745ed893667. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/DEQ022282792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8640c5338d6b38f46347ca5cc2397a5969255bcb8248a093aed75a61a39fd257. 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/DEQ022273440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a21b86fcbb7038bdb255bfb8bab298da65cb256a9470ef0d2de8fb9d6e1bdd2. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/CH7812353079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab266aea417511e4d2cb59d886697125538b3073126d30ce3d4fba73e495d3a9. 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/CH7812356377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc850d9bc6a5a934f46da3bed1cffeda75c2c8ef297e33d4cdee235500178b32. 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/CH7812416799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6d265f15ab12712587f7e779cdb29dc142e92d9855c06d16f4d7286620774b. 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/CH7812417580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b53e89cc8545b7661f8eb9c028cba29f13e297d6cc747447ed40cdd721ee84. 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/DEQ022105237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b53e89cc8545b7661f8eb9c028cba29f13e297d6cc747447ed40cdd721ee84. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEQ022105237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc82c81b43bbe002110a3c009b1d0e4486b5a0d200302be8cc7d513a6ca25089. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR59R2261340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b84b27b5aa6ba1e4f13e2df902d845870d15986671b54d7806b2ee49042cdc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CH7812420619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe744cd38454c92fe6811c1af352ee4b4bad2b9c630fd5ab6baac9dd40d35e72a. 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/DEKF22200178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe744cd38454c92fe6811c1af352ee4b4bad2b9c630fd5ab6baac9dd40d35e72a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEKF22200178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72812a47a327852e5f6f553a31fbcb40d27e0463cba461bf04ea1d337adf855. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CH7812421317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5523dadfd5c09738ecfd9dead102f2f30a5b20b62a454d473547b13e9b5bbf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CH7812423486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6171da014161e6d441a6f4dd01036c4613dacaf018b70ab3ebe82ace11176ab1. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/CH7812423487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc0d8a9992ac30dc63ca8aa4b3703afb2c9ed301d874e7947032964836af037. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CH7812527325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72812a47a327852e5f6f553a31fbcb40d27e0463cba461bf04ea1d337adf855. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CH7812421317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf441e4a5bfc1c3664cab5ddb92a22e7ec4829046bd9477deaf21804cb186eba7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEQ022290118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46f4d19f9586918e803f05c9accc19235f69908965a0939f6ed3e455fddf417. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DE1CZ2200066.
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 0x8cb5bcb9d8295f9e3ae9399d918b9a8bec3f684be4f826587645718f68d0be2b. 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/CH7812423488.