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 0x604dea66d4a76579ae2d7d3bfb851b11ea9232a114fdd9693d43f4af3b27bf07. 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/88c1cdb3-fed3-4509-9157-b07ede49e38b.json and https://artists.proofprofile.net/proofs/artist/88c1cdb3-fed3-4509-9157-b07ede49e38b.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 0x48a9e45b59238d93aaa20c785c8f8d070dbdba753e9b02e7b017c52d10cb1847. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZES52493399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4c806d65d5eb1653c68899c6fb4e7830916b933ae3ed198313d2020d92ccb4. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZES62497978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8994791cfabe5616673bc8b4ccd096d3c32321aabc45540449cee0363d846b3. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZHN72422020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6295a79e2eb42ff89bb2eafde65d1bb5725de5a9a710402ea2a65089998f4d1c. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZHN82443786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65df2930683291a6e1db01630612e8ac0ce6b665748e588bca85ef5ef0ab865f. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZK6G2497020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf0461e236cc587d85c87bcefd57f1280adefc55d2bbb40e8e60806d55c3543. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZTAZ2426604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0cf1a2c2a7d5dc754bf372921e21f46b65b25345fe4767357885f40c4c2522. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:31:54Z), 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/QZTBF2422068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2039d147e00bd4dfe8360c72d7399da839e02631f9a639e8a2ff2656af71c9fe. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFYX2552594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2fb21acd82a81567ad55de735de13b1693d098125b70b96f499a81314de828. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZFZ42559727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e9876e17f21f01b999511764e42b31059bc1b0ad1d5e7388784374cc9d3ce7. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZHN32521431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbc14868f512fc4105473f8fa2bd6a8058151d4a594c5378bd8be1304812b3a. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZHNA2553673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b5e4d3e822530b5a1f91a0bf47d0a58dad6ca3ddbbc1730681c5dbc0cb979e. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZK6Q2591820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9acb435b0523a1d882f0c3f9cc624003d532d2c6bddd86eb9a03037d77e54e43. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNWV2594293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8fb0c6f6e18224043a11b506cd79d80b2d91b153118454a74f072d66263bef. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNWX2576327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609ef61f4993352a0b49ff7083171eae1a8a134500507a34e5ef79cd716e7a3d. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:04:12Z), 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/QT3EY2512605.