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 0x777e9ddc55ae2c5f2d6697e9425d0879e4ca9e6aa507025ab400611ac651f68a. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d57c603b-3d34-4a68-a9ed-9af7eaba3a3c.json and https://artists.proofprofile.net/proofs/artist/d57c603b-3d34-4a68-a9ed-9af7eaba3a3c.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 0x236365a3dfb28d4a7b7960054604a9b3cdb9680e2dedfbec892ea6cf5eb16134. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:52:41Z), 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/TR0341500218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65de54435c87829e4fb1f211357bf65664dcf416f82d311a0279d78c2fa4328. 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/TR0341500222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dea38b0c50c3b3ad78eb702b852068a745d6d2f4139317b25f32b44b3e578e5. 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/TR0341500235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6ac2834564f705853d8ad5822e162f5b3c8b6746c4897ee9046706771551b2. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/TR6020800028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa8522cba00f318ce7287526dec61451658f79cde8f62085d18e7f8f5ed077c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TR6020800032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ecb923f3aa9973072c5c8e7eeb79e73d4ee8b3e8660cf7ab626b947bf0e880. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TR6020800033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68507da8c234f99a61e4b86b17cb4bd12a8169541019689b428917920acdd48. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:53:02Z), 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/TRABD1100069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7e980865976d34adac88829d83a342217a607d3e0cc132a3649fd462afb5c3. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/TRABD1100078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0391c1764b8b5ea51bc1772d65e9f6ad51582ef8a8e8f558247f3bc43154fd37. 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/TR0341500196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1a9684ccd5c86b81bf42fa1d85834c7f9d776be15295e5c3fdf0127abd2cb1. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:52:54Z), 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/TR0341500199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad572fde8d6abc75516dd0dfcb31175613939d0c9c8328c81a6734eca96769c1. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/TR0341500193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f82dd426df6e44a2d24584e9569b8e58e9616b50e90563c5cae2d6b1d50c6d6. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TRCMY2500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd65b8b1c0afb4add5ea0f52e416bd5f0a6a1f98054ad62f69bc8d040f8a655c. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/TRCMY2500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa519d9875b907a20f990341e4d0679839b62ea2535aab29faf29091d55d3b3ab. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:37:25Z), 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/FR2X42536760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fab541aef1deab5eb47d81404e11e0050407ec21f5d9fcd4128de42fc23acf9. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FRX202547633.