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 0xccfc3e75e75896229d4b9a2e8ea8efe3c49996964c2acc4e30846c5fb60f8ede. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d18dbefa-1324-4862-a702-a5f4b4f35cc3.json and https://artists.proofprofile.net/proofs/artist/d18dbefa-1324-4862-a702-a5f4b4f35cc3.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 0x44f663ecd0e378e295f334350cbe2f803c8bc0d0088b8a668b9f9490ca3b31ca. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DGA0P2408515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb663d904d22d7aa0fa30278ac473f9209d2bf038df4dd82b8fe9e65337f68dcc. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DGA0R2438494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5cb9f9a068a98b5d5f7aae6e6deb69f3ede86a151f25406c9cb59b67034f1d5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:51:45Z), 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/DGA0S2400651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4440310d06d975948ea7cc659474a613bc1059670b568b32d56ae9ad4310dccd. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/DGA0S2460408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289f604233b766cb29b934119f1531215f39d8e7f1cda8ddf5ee85ea4840456b. 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/FR10S2525440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924536813b1e172308b56edec07dff3184a15fa1517b9750267a692bdef7b215. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR2X42503332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc383b5573f82a86f10ae78ad271e8ee25d06651accf14c6a32b9aabebbf52ed. 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/FR96X2548195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90460c8ce04d72be6f4cc727c1a7bd6d2619940a2f72602ff55c335ed80e5dad. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/FR96X2548198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a07eb506ac4240228f55f914b0fb2f7644e2fbd49b61f5b1521550aaa2a521b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:55:57Z), 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/RUAGW2505340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aba0382776e1f1f8eaa61d359a3cd9d18a750356139897e02019c617c3d9432. 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/RUAGW2505831.