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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578361d2fe582936adf60f67147cb67176be48b40191e42b0e938c4682e23b6e. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de060952-41ac-41b7-a949-b099ba7886f1.json and https://artists.proofprofile.net/proofs/artist/de060952-41ac-41b7-a949-b099ba7886f1.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32a5d6006024b6f280ffb5b8c6106ef1f61bc0e1d13f2e1d175d2dcd2701284. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAJA2434333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94715a2cdfa8599f2bb23f6a8b7a6d641e7fbdaca7871373675eec7203e2e19d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAJB2434348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818b69a006f3abe0a80e989f6a185f019ee53ef143b2a461f49e7bfa26076445. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAJA2434353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a46ba67b0203041b1fb394f5574e1dbf35ebaf2d06dd1c67cb5345920a7f89d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAJA2434363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977de6aaa49e11e250c48f2632dd9d852ab9d25ca1b1bc80c6ef999b244fdf3d. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCAJA2434370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac4ca18b84aff8defb35ea61a4678e2d303cbc4f25ade6751ea50c442dcad8b. 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/TCAJB2434384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d57a5ecf0047883c9c5d3a1d0df9a03ec36d76438abef5fea26c2f937dcbd6. 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/TCAJA2434392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ce8f41f258addec02c28f6c6ab4f1fc0e8917583633d3f1e3113c33948345c. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCAJA2434398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c877c0ff37a08e23917371f34cad1ffb85690c57f84a26cca18b23949ede1a9. 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/TCAJA2434399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07f04be56c0e7d0d0529c167579f948f140bbc8c0d70a8ab5e66cf67ef2479b. 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/TCAJB2434404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ca19e596072335b35a9ccd5210c3315354e9223f94b59d087901813828ad7f. 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/TCAJA2434419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb20b99d041629df036e71bd5937bb328d8b48874de92fc429d6160ab55b21dd. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCAJA2434422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa960d6b07ad2230054f8897c849ea27c54391167f1a1553f3711ad12c9e11d82. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAJA2434429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b3c03d112f52d57a88dbec3371a180d60a3ffcc9a23cf4cc8743b2af4164c1. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAJA2434443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2acf8cbe5fd5e911b79d07bb0be1a78063abe8064b265e27878e318ce7def7b6. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCAJA2434451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5259e9497e30a69ab534d5f511d1a98abebc92d64304b1763b46f7a9e59f1c48. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAJF2527937.