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 0xb9584d669bc780abf08c807b1ca8116b4c5147a48c4219eb9ac71d918cd25605. 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/f0e0b102-d0ac-4557-8100-f8d77c149e06.json and https://artists.proofprofile.net/proofs/artist/f0e0b102-d0ac-4557-8100-f8d77c149e06.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 0x20021b76c4907720be44289ee70578aea51940fd5544ac0fc9e16195cb4f2803. 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/ES71G2405256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3337dd5791e33fbd1dfc957c9642ebe4f91c7969c9f4b4bbb6631ea08cf22f7. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:03:23Z), 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/USA2P2309021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8e85f088137aca20ec3947e8cac8edd0d0477a698ccc1493a74493cdd0ea60. 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/USA2P2313128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835c3e7dad48af9e28d9bfa3259096674599a94c8540449881ce34cad7fce9e4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES71G1923304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f943ca97239b6215e2e38b938b19afe0c149ae75443fdb1fbc92486e046363. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QM7282483489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe845ecc8a83fd712152f05bdaeae7ee5a3085e4b278999a5eff0b963b46bfc6f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMBZ92420080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd183627c328298047f39391231ecba6d94b91f9af19762b5e07b1cfe137ec8e6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMDA62449532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef33f41f53ee7225ebcd25977ea1660f2f090793c801e92b1c8c5c6c1afd0fab. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMDA62449660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe845ecc8a83fd712152f05bdaeae7ee5a3085e4b278999a5eff0b963b46bfc6f. 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/QMBZ92420080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f943ca97239b6215e2e38b938b19afe0c149ae75443fdb1fbc92486e046363. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM7282483489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dda3ae8b2ddb890573bbf03768ea6b2575463f2957a3afa2c6fcd5d4fb0c769. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/COA6W2102875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf54ef0d29703629a251d15efac3e887ec1330482097991616cdb35c21283e1. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:12:13Z), 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/QMDA62449591.
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 0xc678d20266e2471a17c1a091347ae6284cc08f43224a7122e6f659c9da7c08b5. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:43:27Z), 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/QMDA62449622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb180c11dc6e5525ff6053f27a2b6546c3d2e81220f556408a829105cc74e88c. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QMDA62205364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578657a497e9833f5dbfdef7398f3d8e44f8bb57c8139610c31782008e1291ef. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ES71G1944114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f1d830af9d6094faa53fe335a3f7da0d3d3b95cf69a7edb95584d82e56f9e8. 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/QMDA62449551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad078e5cff0440e0235e8189529113e6c1f12ffe39587c1d75ca3a4ef7a78192. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QMDA62449569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee236c0de63c344646b17f5c5b657653c356597aa78f329cbfef5a79a958fd7. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/BK4DA2308552.