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 0x44962259777902af3b45eb31c84607d30401a5c17f47f55de659ee5ee0d221d4. 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/3adb0c38-016f-4f72-8b30-3a35584d9088.json and https://artists.proofprofile.net/proofs/artist/3adb0c38-016f-4f72-8b30-3a35584d9088.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 0xe9613dd6d0246db23bbe7859e249019a8802ecbf789ae4531290a600b22e883e. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/BC5MF2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee7ce508ecd85b4698441154eedeb036422b12e80490405602f6ddbd37c3267. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/BRRGE1905269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec13bc3c0f63daf8b8d92c747feff73b84dd461a2635ff134ce971a2fc97196a. 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/BRRGE1905270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ae52d67c9449ef4766df95fb1485f73afbb183f14093940931d68d60a5f749. 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/BRRGE1903052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ae52d67c9449ef4766df95fb1485f73afbb183f14093940931d68d60a5f749. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRRGE1903052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf318b77cdf83a380fb5fb24a1240db9f68416b9aabe9d6c73f676cd6b72842. 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/BRKO12200099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98f79b5786f3debc98bcbda597ffffc5019054d4dcf5be7a8a1a54112ec56f1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P1835694.
Chiquita Bacana (Dennis DJ feat. MC Kekel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d0ab60f6043593a2085677943fdd4ff332389916c3dfc11d011b97e00963f9. 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/BRSME1800147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691d72ebfd752a5aa2f4e19d587f4144ba2cb7715fd86daf4d0b3f31f50e00ba. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRRGE1806687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6453c1ec6cc61c181cd5f0ec12c7336f6ce5af51efb290720fb2ffe23f4446fd. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BCSOR2300132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e33acc3a50ecdb866811e6d4b70160061b159e0b00ca95ffb76f18ad4377f7. 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/QM6N22358547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b0a2a6ad2cfa696eba61e6271c50c3e8c3e7e66e4d8e38ff8a300f09290941. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/BC3PG2303455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff7c162195f54caeea89a7d257f82a046a34010575b54e200659bc83ec1c3da. 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/BRKO12300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e4363b485b1b9bbfd219ae1b5b3ca373642fc862ea239fb58611c46b4f6093. 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/BRKO12300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6646260bab87e8232796e9cdd82efe98939917673297d43c0b289b1109b372d7. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/AUBEC2339928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd750569a9646dd8b19767ef64f57990b28ea0fd9baa09af2f5756d6840bcb0ac. 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/BRKO12400365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691d72ebfd752a5aa2f4e19d587f4144ba2cb7715fd86daf4d0b3f31f50e00ba. 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/BRRGE1806687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b17e821b917459f142b2b68388f4290c014147750a3e3bc48ace604e225812. 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/BXKG22401616.