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 0xffa69c79ecd51d37c8d6b3cae47e10ed3f2337eb0c07588c78446b4a7746cc4a. 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/4baf3e56-23ec-4f96-9845-9b4f9d0ba38a.json and https://artists.proofprofile.net/proofs/artist/4baf3e56-23ec-4f96-9845-9b4f9d0ba38a.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 0x87bef59ff1b902294b7fa272ba51bcd44d19bcb0acc372e1fe0a259fb2f7334f. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:01:00Z), 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/BR2TN1100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6dcf94909c53c589a590387f9a51635beff7be0656216786e9a5a777426f1cd. 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/BRUHT1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89211dae6a9c7b7795d8bd621ebf62613b3506fae813ffbbc6b4f1238a273f24. 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/BRUHT1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f06eec1883b21aec7951098f3f01d5be5b2f50e04f3356d3062d38ea687dc4. 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/BRUHT2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1c22a4c570f54792bda8a838607b0c8621376e93d55e744388878c9c52749c. 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/BRUHT2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f43af07795cde39586421b36d29729541d3de29451510b5f8fe63f4a59605dd. 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/BRUHT2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1e2c2b512d3ae0597abe7b5eec38fb02d8104e45064cf28eb97331bae453ee. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:31:22Z), 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/BRUHT2200007.
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 0xc4aa0ab5cd5e0861ecd6cafd66b64e100e0e14e4c0bed9149a900ce538a0bc07. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BRUHT2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb554ab5354d643623484e849b14be49be2c293d79c32f1e4ef1df122228dba. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/BRUHT2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f75ce27d2cc13f74ff833ddeb2c53b36b6d11f89487d5a813165431b7b4c27b. 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/BRUHT2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb86689ed0e6b0864ef0127c2b7d6afdb65c3ff6a8aa2774494f9c1318c0dc9. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/BRUHT2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c92af5af8e7a9c7ad1d8d324ab3dc18daf3e894754e64394427ef908701d0e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BXTS71700033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72bff0b784a26df2088dacd52b8c051992864cae98d1e1c0b4e1193de9516a1a. 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/DEF230900028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda1fddacb0ee9e1aa553c1cf653c03ef9dee443bc5a7e51fe065c1311a5d6a1. 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/ITO0P1700205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b3c31a80a26a01d6528c15bbb23041734e1d8b19418a35a2883e8a62f6d813. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/BR3BD1200013.