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 0x38167ed83902e95d71765ccbac00638ce17d7c230881f77dcf2f0e1f0629a27b. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/edab1ce9-bd93-41be-8b62-af015c31111c.json and https://artists.proofprofile.net/proofs/artist/edab1ce9-bd93-41be-8b62-af015c31111c.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 0xd99ea6308cb1f91bfb6d777b7a9b6531be1303261a0c90fbf262650e3b6ce786. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRP001600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a40cd05fa9bff4fc971e8d2b9a4ee84cd580976561ee2672c1edd288f90b4f. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/BRP001600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabcfe081bf54dbcea835cf37ef84b32856c7c9372c76deeb26b0ba29806f99e4. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/BRP001600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b1a699b2af597549c7906c5cfd47ea7a10d09b2078906ee3ddb22084ef52f5. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/BRP001600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bd356a4d72ca8070c5705c646d538b1732d89b7da8681c634f62ff031f42af. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/BRPOO0900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27cfd7be4d50e742e951caceb2b88ddb65558f9ca652e614793f7f470ae7341. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BRPOO0900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4c63b61fb2d361e6d316c03b56ba202663d9de5e42bceb48d8d75d792dfa66. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BRPOO0900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e6f76fca81806cfd5e103db624186dfbed429a09b0256bc16bd1937a36d32a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BRPOO0900025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfff23e4c20e18036fdbf368a507bbe7a5ae1e4d5d3764872032459ae712f4e4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BRPOO0900026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020048fbb0a45f5724850e4da5a3679c4377a8f8a2472223ba7e0e0b937a3f22. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRPOO0900027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b388f4f617e9584d977b9c17dca8b1c1d4411b77d2a042d53b6046c663af390. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/BRPOO0900028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b2004fca5eb943246cea522e78eb438d97cb7baf14db28fc44be6bce3ecd68. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BRPOO0900029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3143b51e1e610ff0f1201898f1e0a98678d1c27f43e93f4df116288b5b0dff5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRPOO0900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf5b837c074f616705fbddc6f76b58117b1bc110f8ced2ca376c62f3859ca8f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BRPOO0900031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ae00a0d3ab4509baf4c8bd488ec0cf569da2da5063922525b54b494b7c9b30. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BRPOO0900032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6001897d04c0db16730ede5626a559b1bd47f0d4c4a41cc977417e4a4278f1. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/BRPOO0900033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6cf8c91d83cb2791ebc295a2de8693f7ce64a8c0cc89238275a15ab09d8cb8. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BRPOO0900034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2392a6cdd4458b59096abffa8b6405b6976f18efabe3adacccd69a6e0baaf34e. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/BRPOO0900035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe257874e0d19d470d57b29e0429bae5d603346e643bec24604b45bf609cb5e73. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/BRP001900001.