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 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 0x6d6dd12379055d8161e044d0947e4b63afc8c662ebdb45959925f4824e2d0693. 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/177d3006-1c2e-4b4d-83af-d9f0b9d9d071.json and https://artists.proofprofile.net/proofs/artist/177d3006-1c2e-4b4d-83af-d9f0b9d9d071.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 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 0xd52e7f3361a90195417d6ae3b3f68829a0a50691d96afb7e8c63e8a79698273d. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/QM42K1979678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93b65fa41108949949cc87eae98903f6c0a9f3dc05556300e7df76eb385578b. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/TCADR1851759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69bd55535d56ea5f6eafda127ab31e4d2797370caddf6a16f2ff7f0c9346fe0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QM42K1968822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a005457e72c45d6e7e9e231a397c689bc9c044493a62c71dc4e790a04440dfc. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZS652146247.
Please don't call my phone when I'm faded...
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6bb843073cba4240e986190bf6a0e574298d467d2f01f919f816cb04ccf790d. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/QZS642172939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c09969e7b0d2ed25a3a7f8a2232a5ca07d6acc9376a51db1cadc992f64c538. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/USHM22232707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7daa54e5102849389d131edf2c3be1de2bf95946802770307f6c660502ab3ccb. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZS632302803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1149395721cf39ca2aaf42ed9afc5a4bf843defcb5c11d7071bb8a1f2e0344ec. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZNMV2397899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d7200bcf31f5c8a95199fc5917535da5801fc95749844453334c766f24ee2e. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZNMV2397901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7daa54e5102849389d131edf2c3be1de2bf95946802770307f6c660502ab3ccb. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZS632302803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74a29d6670b536c3d47da893868b6f71e69c3666e505c9ffa1d82b6d3de8f4e. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZNMT2481887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff6afd9bd241098e0018526ed6875964d70c241b5ac2d4825d5741a0d1b64a4. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZNMX2457587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e2b6adebe3c70e6adff11ec0c93a8838a1275792eef8bceb6ebfc4c6dd50db. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNMY2476295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1661ea44fc7e9840f8f82844e65f387ee9c2725488b7868ae295fbb331a8c4bd. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZLL92576757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e65c7fe73a3387439cacd009f35680b02f7326d882b4f0c1a8a6ed712bd68db. 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/QZMWW2551467.