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 0xde46b0b8254d8594b5d355ed28c20d66438b1ff125fe6756a6c9d21660fba3a7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d0a1719-bc4c-4b75-a310-a33bbf1244cd.json and https://artists.proofprofile.net/proofs/artist/1d0a1719-bc4c-4b75-a310-a33bbf1244cd.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 0xde3dd9c8c6773bebf40ebea8fcb283817417cb07462606391252920d06d2ddfb. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/QZDA71871502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe357e1b30dd873706a88946549d3e3129fc8bfeb3a5c3ebcd18080581b78f710. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/QZDA71873371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd2b19ab6720dce6c7042096272c343c3c3dbfc2a3f9807667f0970629ec479. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:50:28Z), 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/QZDA71868378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8fe30036c89a87065b68b938d0583e1039c2226500e23914fb7f90936f65c1. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/QZDA71868379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b30667f8cd980a69a8cf243a705d6aa95ce63b062b80a5c69654f660dc10db. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZDA71871916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc4e409b399dc3d7cd41a8fd719737376a4640a707733ba818b33e55526b2d4. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/QZHN52230727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f454b286af125f3067872ca4b9fab148b556cf6599a99b7bfad1fddfa84186f. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:38:14Z), 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/QZHN52237333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbffc80a6f63ddf1cf04b29719f6aecdd82d0a2362b1ea3afe5d5dc3d0e936d17. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:27:50Z), 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/QZNWR2246218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e7c9706c1b62bc8c5799a012de5a70255046adce58b94c2317b65e7215065c. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/QZNWU2231843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5458109ee6682c1915e74299e7b56d661e6b51ba7a9f21b57e2df8fb7b0d04f7. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZFZ72352386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2104f72085fb0a6fd2813f39386d2035a1c4f170f2b70adaa2c9e99be20daa. 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/QZHNC2354750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae000a83fcca83db2befdfa9330de8eda7507d13119b5b7986a8b34a43771aac. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/QZWFQ2465745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffd600e3ad45c1bc76e1ab4425802690fe43685025f7e98b2e21355512405fc. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:26:23Z), 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/QZZ7R2424412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e82b5c891eea954990a1dbe4bc3d201485c0c402a2d477eb7819c6e2a03cc1. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZDA42512556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cbe0740d0e370908ef5928784bcae98c50908f89ae407cd5c000522e2ce054. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:39:17Z), 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/QZK6M2560867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73630d73a85616d8af036ad61150589a7daf4e0e8d64270b275e90afa17d9fe. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:01:36Z), 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/QZK6J2559675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f15c84e02962927457ca0af814793a1067c040d08163db5ecff6402ed4c837. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZPLS2558869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d19b5ad5c6e3fe961f1def284cf22048fb6d17dcb601b13cd4d70a6828e6f7. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:04:25Z), 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/QT6EB2506676.