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 0x610a9472310c1f7a65a22d99662fdb88d79b3daf7c966358461633e7e83ba8b3. 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/c688074d-c03d-4c9f-b038-9c41764fee8c.json and https://artists.proofprofile.net/proofs/artist/c688074d-c03d-4c9f-b038-9c41764fee8c.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 0xa4e90b9c7828a09ef43e757c514258918cce596db5011d773e7942213c66fb2d. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/QZKDK2205713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb153bd6783e294f1fce130589e5d2b4c2b8fd6985994cff1148815d598bc1ba. 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/QZMHM2245414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3df7899e2cc19f5095ba145f3e9c8a33d9563b830066a29840b916b3bc1770e. 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/QZMHN2258913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73803b6b88b90f864f139f05cdefb4de2b5ff431aa49e2310dbc2578adcd0ce. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZMHM2329275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3ed32926bfdca41ead0f877a8281b6956088aa01af46bf0e3b6683521f4a85. 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/QZMHN2344632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c3ba8e7b635ff79a842641b262d31a19d0a68c4725d4158502c9519150efa1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZS662254119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf858d73f83256d85cdd11530795b282797b1a0d933c8ae13f1ea611d29f3b066. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZMHM2283123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09b3f7003c6a7e3c78d89c7a17d3944656f3cee4f072c80acc0fbdaca64d587. 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/QZMHK2229746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df1564244327a2dfc530fbacff1e5f397b0232602bb8e40cd9f3abdd4f99e4f. 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/QZS662136270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ba6be96c9b32bc8c7b6f33c7917aebfc40434714c564b4dfd8fa16532e6648. 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/QZS652112090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a0acf27d180cbc5df4c9495161104ca7c98c5c8633c19eb43fdc0a63310e7f. 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/QZS672163961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fdccb4463b2ee3b4b2b50668c773cdee5fd979dfe77ae637d13b102bba02165. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZS652185656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7417c24dbdc9fc46f03719262afd12b36232d65017198128ce268f5f5a51ad8. 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/QZMHN2001200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f3a23a710195a2949b5e087171736449c1cd4e92bddcd99f8e93f1a908ef87. 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/QZMHK2099280.