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 0x3bd8704776c470a0180f9d9d46352f0f5b2601c3809196f2f56c058929d856ac. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9b4fe8b2-a800-4f56-9104-38445c982ea4.json and https://artists.proofprofile.net/proofs/artist/9b4fe8b2-a800-4f56-9104-38445c982ea4.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 0x72c419ffbfd6ea63f5128bf078b0d227a5401a7b03159275b99ed83c899800d1. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/QZK6Q1976408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6dd097f4fa37d52b31387165ac169f03f1bd988fe1f7a2e24cadd1624d4c2e. 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/QZK6L2080709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4da72b8ab38cdc84295b70de41133437bfcad1fe31b952a7c723aa17f3aa6bf. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZFYZ2481682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e1fcbf007c6972e82b0208cb80a3d8e2aa1c2ec690b46121712233225db3e1. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:45:03Z), 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/QZZ7P2426628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b08ec0c183ebe32dfb6d2151c682b448de0310ee084dbefdcf80049da2d006d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZZ7P2423844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ee2147c81e41ff57266cc5b7138ec6cf372f072df94aaa2af07685d3e7ac73. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZFZ72589048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f41d3737ca61a46752c0dd6599d1b39c09c61cb7977312975dd38e8dfb8949c. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZES62593930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e4b1bf401e80f7a2fa10117eba9a1bb23ea8282a6b6cae4ce90f4c2a83ca0a. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZES62595338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d7bb5826533a98cad1b4855d3593c8458ed98cd6efdc0c5b4892c3be31ff45. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:38:18Z), 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/QZES62595345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819d7d191e1f091478c36120f81dd79fcace6ae83d78f66ae7b1a1c91a15c309. 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/QZES62595361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582c58f69167cf6f129caf26d0fddfa9ac3d2ce919a72a2ac169678fea6429d3. 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/QZMEM2517348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441d7a31425373730342a3ef31624d75782f18684a0f1ebc090de7a468e96099. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:37:54Z), 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/QZES62597001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441d7a31425373730342a3ef31624d75782f18684a0f1ebc090de7a468e96099. 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/QZES62597001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b44f7d9d4d9799f04898f8367f879554db56f674c83239976c1dc382487ab3. 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/QZES62597005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95bd3e4fa24ccb5ffb04d354c0de99fa71ecbd98fa26f9613e556893af77bcc. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZES62597025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3dc2ebb0c98ed3ea447204e256842178186b5090bf838e37f21f14680ebfae6. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:51:47Z), 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/QZWFP2584652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685661108652d0350870e272b647e44ddef5c354e0021818f9fee1e8fea0dee7. 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/QT3FD2550171.