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 0x5b3ddd11601b4d51b5768d4873cf0b49416e2985af8357ba2e9881ec572d7db4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/68e8a1a4-1bfb-4beb-90ed-80854cb7e612.json and https://artists.proofprofile.net/proofs/artist/68e8a1a4-1bfb-4beb-90ed-80854cb7e612.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 0xadeafbe93a7f4a3df995a0002ffec2c5531d12b9194cc07170fefcf6c96f90f9. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DEWW21800042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71764e8b1235dd734a1d0c2e4eb6b29984e1d25d9a1df427342648da49c19a33. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:43:00Z), 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/DEWW21800151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a04918e12c3b9884c52c9be2c2a9a070cdec5fcbc7a39c116d5c1a32aa0c510. 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/DEWW21800152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ed9551f13848cf4af55c5fc1860372aa585a0eed99d489796b3a96e29878bf. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:18:18Z), 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/DEWW21800154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5d448e2abc9905adcd3f15d116ce39b92262ca7a25d3eb2fdefd159aac2792. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/DEWW21800169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae23ae3f0297af822e37a109ecaf0abd8c28e85ab9364607e151d6475e65287b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEWW21800173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf173d1bfda94b1704bd2a5180d2f9750cd7dbc9c9d96edc4849d4605063929fd. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEWW21800183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3e09e92bdf13e2ed20265821f7bde4a03d6f9a0ab7d5adeea5114bf635c6a5. 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/DEWW21800241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb25002a3dab53251489e41b02958345169babb633add143dcada905527380b0. 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/ATEK02177066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862c1eb8a2f16dcd9138950d8a53cfa32c4794c67d43b84e7561e1113d71336b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEVY82000493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff245c8dc5a892818da0414cc9bdefe0a114ede3efd7e66715b82ca49637e56a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DEVY82000356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21cd89e25101c824655f44a6b23682a3c359ee5ecc4c14b70ab6a2489eca086f. 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/CH7812221394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35d030d27b6be9a176638bccbe85f598c730f771c3d0e413ee9dcc6a382d498. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DEZC62262071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c69b647b50cf9dff1595c408840a2fb499982c080920acfe8aa159c100f4d5. 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/DEE862300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884c90a8c6378527d4e5c7e6c0ebb15eaf9e22d5dfd5f6bd992a541053c8fa40. 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/CH7812347589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7c9b63481ce4cfb59b91e4fb6c2ed7dc3a87607262aebb8a5ac7faae2216d2. 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/DEE862300803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76cf902649a9c229c49e68a6f1735630961d477c86e6820f0c543459e317ac8. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/CH7812409176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcc1939570b355d57de0a00c65a7c3a2e51601ae4d7d4068ba4894f85eee308. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:37:21Z), 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/CH7812419174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623317f92985791a0c14cec5a69960e853d2e389ee9a4ca6f453cd4c0f359078. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/CH7812424311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf817e02ce78e3de95af1e6e628d5e1ccf67edb5a1a17d800e6e83038ed30a82f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUYG1301463.