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 0x01e79c7cc977e91db8ac4143a0a15d73082ce2776f6b852c454fb3b391e074d4. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5453f19f-6b13-474e-aec5-4944e2c3d34d.json and https://artists.proofprofile.net/proofs/artist/5453f19f-6b13-474e-aec5-4944e2c3d34d.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 0xaef13cd63c5322290b95ca59eebc3f8d4c17702fc69fb1384125513356e55885. 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/QMDA61530330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890d92a5636adcedfee227531e826d9eb24d7f679bb7d5874ed28a90a1eaa488. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMDA61530331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe50f5a2320359ac8eb7d3ac3b85af486225a53642c605b9a0a00fc44e4f1e5. 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/QMDA61530332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5de36407a0bfa949e936d468fa60e483c350c81ce5b17c44c467c24ef4d35ae. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMDA61530333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d46273598b50a3566b3937c4e3faeae5b2ca27c7da66f3d5d1404446afaca3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMDA61530334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7874032caa8d67c44e16554f676212510f504512845ad30ed325b4673656959. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMDA61530335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d63f25a4e9bdb206bae08082f6d67ca36688e0600e3ea7acda1873a91935ae. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMDA61530336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe363bfc3c14770a8f885aca301eccbb66b2c254c35942dddaf16205cf7da6193. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMDA61530337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd573911628a1a9b8ac4ae0f79290864f28e3a3498a989a29f4d4b010260ff2ee. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:18:58Z), 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/QMDA61530329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c47b897f43fb1b832935b164bb702b216b093e385551635c50934ea85412ff. 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/NLRD51401894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0968a7de02eceee3646fdff977745de49fa85e4327d4dcffdc8629598d777d. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/UK8D41405310.