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 0x1f359a992e58d1498b63cf6336af49a14f8d5d4be61dded00437fdbcb1bab1a8. 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/bf17de90-fb39-4d10-94ea-ed90eda96ebb.json and https://artists.proofprofile.net/proofs/artist/bf17de90-fb39-4d10-94ea-ed90eda96ebb.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 0x37dedd2878eeeb54666dc21fd5e406cea03ce5b96d4fe642bce3c02caaf7d563. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZFYY2087670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1025fcd4c59b6b3388587ec45dbd95f456d7b432ef971dc7d9af0f9046fb6f8f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZFYY2087671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb1b5dd73738dd7b6c54fe6aac8578775439b69b9e97b9c2afefee2996f7031. 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/QZFYY2087672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ead4f46093a7a7085cbb6b2a293559c768b185660f7ac101c713ade52eb4f0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFYY2087673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e6759603f0657fb1ea9e56801973f733b1349bb032e4e63361be5d61f2f526. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFYY2087674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44dd01fc60d4f10ce6b23532e6abf7e6a14a24fec6364d5d89bd1b5f492ff50b. 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/QZFYY2087675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9798e41e8be49dfe3c4375f99fbb5d3c7300719f4deade2d301eaccf11d6f5. 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/QZFYY2087676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0955f1dcf2c595acac57df471a47f067d9c6f92c42eb7b1af40163e7f2f138. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZES82068746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2b5f671dd2076f32b894659289836d7d0f806d34b3ead820c4ccd48ef8c0cc. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZES82068749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b014d9da0209aba09669e17fa65424a4e45095ea4678778b58bcb6367659dc5. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZES82068750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953b4a5f8ad4eca05bfd247b5cc1a9049604110cb8aaee776ea944d5e775ae65. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZES82068751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7909af3a20373a5b94af67a4a092299058b66c92385839fccaa23f3bb7518167. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZES82068753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2be9d6986df1d3159d3f12344c48901a41ecb86fe7fbcb4fab2f4f192f43c00. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZES82068754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0778bc15bd69f5540e644cd119d6fa8314977aec28b4bd9c8269ff2b8adfd27. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T11:05:55Z), 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/QZES82068755.