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 0xd0ae961a4f3f064032a78707bd87c92dca237eb2fb2bbc147450d29774c8d15e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5ba385d-e989-437e-8f3b-191266158d07.json and https://artists.proofprofile.net/proofs/artist/d5ba385d-e989-437e-8f3b-191266158d07.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 0xe867c83614299459e223cbac02c7fd5dd7a9f2664c09c9ab039535938fc5ba0c. 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/QZRD92201448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95992adf43c0b6aa6ef7774c27d36a3673be7b5bf30b0d701c68886f020a5c38. 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/QZRD92201449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa436ab711b29bd5df6ac5e2e6c9f77263a76a6dc7f2d77b2ef5ebfed2d5f9e56. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZRD92302813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0058dd49de57b19bd12c1923e596b28f28389c993c6cb857ca9e1547f55c53f8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZRD92100505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafda77d2ebeb5daeac827e06e1907577fa4dfbb21d4a2f1be5e595d121416ce1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZRD92302814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c4f49213e3cbabd099858e835249c075e91c2ef3f33ff9db6ae4c3ad5d5fb0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZRD92201450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebf6693d0c8923d90846fac0748d1c96977df95d475448b7815293e0edeeea3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZRD92302815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe315d70d9de4c23c4042614d003997440647cd112269cd7a1574caf37df9694b. 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/QZRD92201451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa103b4e327b13b76a5cfeab70461218bf35017b7a971416aa4d05f18c1e44c. 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/QZRD92101027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b74731c8e9bda6aa51d64e73ee7434bae1d0634f98b9bc0f3f80a649c3d30a. 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/US3DF2418722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a686fe5d038dc40de84ad79ecfb300bf57b4a47e8c439ca82925eee004e438a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTB22381119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51174e62b5ee179d60d8bc4040406b02b831c9bffa4fc8363bc12ffc382def94. 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/QZNWS2320328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709b2c67c3c6f24d326553e70a44cfeb847dc7e88f6707c38f4a2a91f38f645e. 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/QZK6L2323581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd660da609c4e030f90f7eca5e7cd55c29f55a79145f3b549605ae35e612a9cf3. 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/QZHN52350416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd660da609c4e030f90f7eca5e7cd55c29f55a79145f3b549605ae35e612a9cf3. 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/QZHN52350416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa103b4e327b13b76a5cfeab70461218bf35017b7a971416aa4d05f18c1e44c. 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/QZRD92101027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x849d43307d4522b4c9da1f6b5c3f3fc3591f4557407a37f01d5f16e14aef48e5. 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/QZRD92101043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95992adf43c0b6aa6ef7774c27d36a3673be7b5bf30b0d701c68886f020a5c38. 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/QZRD92201449.