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 0xdbcb6056dc1d8387c7bd3285ec2678e5840e97ed29d951eebffae4e06519de6b. 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/c9870e22-3ba9-4162-b14a-d34f3fad5cd6.json and https://artists.proofprofile.net/proofs/artist/c9870e22-3ba9-4162-b14a-d34f3fad5cd6.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 0xe950a130b5a92405dbcf3f2868af05fca4b0817cac72905bac6c8a82c2ac9862. 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/QZNMW2183154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20079e1833163934deab54c1a2ab3c2557245e351b8ced99b6ea9524ef021492. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:32:00Z), 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/QZNMW2183155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedcec7eb76870ebff15ce26d85627e78e49888adbe6068358be8b2d02de798cf. 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/QZNN22021987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8dd313500413011c174d41715f4f6ad6974c6dff62942315c74f620cf881a56. 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/QZNN22021988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291b5f3ad38d8761bd1496f82c2ef2f77705a49fe78c456f1620452c2f980706. 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/QZNN22021989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63beecd055d2824db8978efb823927d79a8f3e3960edac50e83d6f263326b80e. 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/QZNN22021990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38426841d7890b546e23be787a5b419dea8f444413b2b78e8c87ceee1bd4f5fa. 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/QZNN22021991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b3a15cd467d36dfbb6982116228b24941e92b5e4f086229d063b0cf2124412. 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/QZNN22021992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84caabaad92a02ff0bfd78cd44ab3d2dbe873725c9c9d47b1efc95ddc725902. 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/QZNN22021993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb03d80652e289b297e0ecf5f8e33d720e9461a3172ff7383f7641fe7f83764. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QZNN22021999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffbd592f831b5269dd5585f64e9ae7dad888990b116644b7a42e1b400c777b9. 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/QZNN22022000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5bab101f254d8902a8bda1734c445f530d306981cbe07c1d25d56a261318f0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNN22022001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95025b5d203a9976ff0cd0704cece990ba0daffb91c158383de08ee5e2a871a4. 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/QZNN22022002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68fd2cd510f22bb458892bcb215ecac49b402a5269cdfa3f601bdd8e08fd3094. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZNMY2199207.