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 0x62fa0160084494a0021b008c4879894685c177b961fcef9ef4ba8c85ea02a78e. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8ad2d9ae-a07c-468d-9235-3fa95fe92b3d.json and https://artists.proofprofile.net/proofs/artist/8ad2d9ae-a07c-468d-9235-3fa95fe92b3d.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 0xacd481ad5f609e2141a6869906cd478f322d10152c6ee77fa941cbfeb5c295b9. 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/CAHJ90800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b48505d5aa379cd3e442bd0ff67e68637b363f4a9e8652c3d3a512d5ed3878. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CAHJ92200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82a6f8a9d3dc56aeac2f7456da9da01c95c5651f190ed123d96f92fbcbc3e37. 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/CAHJ92200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00100a6fc427393ebe85c6d4666c0f8fd29795b0b770e85621c4a7b92140dc9. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:39:25Z), 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/CAHJ92200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b094c79894dc0e085fa6aa13ce37008f3d99969a94acd7f39a8e2811154e8ab. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:26:32Z), 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/CAHJ92200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5359c7480dc6cc91943c9f41c4d878fb507061e41bd029ab372c4f5662af24e. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:07:36Z), 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/CAHJ92200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3410162f1bf97a2839f61cc1ddbc8b1dcbfe61f01b2d8e8fc575c66eccc583. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:21:34Z), 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/CAHJ92200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9cad8eec8fc69297bc7feda27508d2a6aee1b3ff57504fb280c0d318eb7e1ee. 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/CAHJ92200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8567f3c2a7d64c6a0a9c8b0657199ae6e8b5d53e6ec25308cd50e9441fe956. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:03:27Z), 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/CAHJ92200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb8a9c3844d5d547bc279465cb17141fa8bb7eee38690081350cbd4f8ba32f8. 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/CAHJ92200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8e4a5250737c5a304f718e685832dbfe4d8e1c08d32ec63c44c8aa0241117b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CAHJ92200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b05f635beff9b7df92be04b74cdcb02d0b2730ae41e2ffae6140206ea1bef1d. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/CAHJ92200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f51725f40f9464a3bb1566976a408875766a775548e023012f3f7eabb9be5d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CAHJ92200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9109d68316d61ce6b2929584586fa8bad79a88876d976aec7ea357dd820698f7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CAHJ92300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d056e139fdcca2c2e849f89f47c78e2fa1005659a02cb78503227ecf42c7da. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/CAHJ92300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbe225eb44b8c0d56beb085dc356b041997efb07937c5fbb9915f9b4b369e93. 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/CAHJ92400001.