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 0x2e630cb05cc9065feb9d6c325cffb41f4afe40c14550b6b5594136078678e499. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/22139a52-ce23-4a1e-8f49-a234a50b1113.json and https://artists.proofprofile.net/proofs/artist/22139a52-ce23-4a1e-8f49-a234a50b1113.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 0x61e6183988174b4501f92fc7c11d4f0b602064173538e4803f419abcec9e7f12. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ES75E2509802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d70b920c20b11567e60e43d6d985c89c1537474a54deb320b814991f3f6a920. 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/ES75E2509803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44eb21b8332a51c4cbf0cc9fe0bca5e68f5bde7fbd98d15a07b2f0177f48b3e6. 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/ES75E2509804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd097b48382044fd7aabb8333c783e9dd7d953d8914e4e43ff47b70dd32e5c6. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ES75E2509805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ecbe49a0b6907313778493654a5343a294dd60d2c28e0c27dc31c18a10bca67. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/ES75E2509806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55366bff2cff5c5370130567af6769379e449b86967e859fa680cc9a715b4ab. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:35:52Z), 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/ES75E2509807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04556d68a3b9b7c4993e514072bbcb8c5360dd39ff0ba279b206398598a714ef. 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/ES75E2509808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06f45f0f871851e9e9d9a02e190d678e1dcadb57ec1440b65a44c6758c5669e. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/ES75E2509809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbf3bc7e32abe1c7dcf9029647d0b27f613bf4f39434254f32aa20065531ee9. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/ES75E2509810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be3189b9f334d33cf6aaff3434fa0dfaa80850fbc9041fb9c62ec0325229861. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ES75E2509811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c0b3f2e9b86098f64af554f8afc37e112b04dfc9c2e5739781877bbdaaae8e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ES75E2509813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9bdfccea141fd9bc8da605c94040d06251a6784bdae19cf93df93757a07e5a2. 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/ES75E2509814.