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 0x8e1924d04d27a75af1be6d34a4cfaa595f64644c3956016680e0934abbcb6092. 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/b49a8917-6cf5-4101-8e35-7a43701d50cc.json and https://artists.proofprofile.net/proofs/artist/b49a8917-6cf5-4101-8e35-7a43701d50cc.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 0x1e9759cee0dff15ac6b03bacde75dcd742aa77957a574388233c75cccf3decd0. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/GBSXS1900185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a99b8b5e42ec8ae2b4de25f8750f65cbf7202a3bb3c5fb9cb0fa622e64f301. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/GBSXS2000072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02aa57d8bb0934eb70ca807deba7ff951e4571506047ee5b3078f14495e80be0. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/GBSXS2100081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa95bc0bbdb67853996f17e812ae75293f49c04a124190f2879394f20f9d2f4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBSXS2100079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e2aa83bde7850b9fb468de53c60bc61d75051ea6f74aa7f78903938d710bac. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/GBSXS2100086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02aa57d8bb0934eb70ca807deba7ff951e4571506047ee5b3078f14495e80be0. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/GBSXS2100081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d202eb1e4e8727f4234c4c2e0b29408406b363ab896403df5a35a05fd7cd15. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/GBSXS2100084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e2aa83bde7850b9fb468de53c60bc61d75051ea6f74aa7f78903938d710bac. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GBSXS2100086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e75725856286f9682d059ba6685899ae535370536ee845525899c47a1bb65e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBSXS2100088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42eec25239742ead3541ca9bab699d88c7cd62607983faae7f45bb5a4f4604b. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/GBLDX2200099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575c0ef76302caabe567380b6fb3c741d151ddb69c42c909c080b675e91c6d07. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GBLDX2200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac3847e662c024988d5ff5e1d2c8fe491ac9e5e19c13a0ee6f012c9c84ecbd5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBLDX2200115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17bcdd04338f24b1d0e5177dc99f72a85b2bc0675ae4698e5a17d7e59136a1ee. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/GBLDX2200117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac3847e662c024988d5ff5e1d2c8fe491ac9e5e19c13a0ee6f012c9c84ecbd5. 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/GBLDX2200115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575c0ef76302caabe567380b6fb3c741d151ddb69c42c909c080b675e91c6d07. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/GBLDX2200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42eec25239742ead3541ca9bab699d88c7cd62607983faae7f45bb5a4f4604b. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:04:55Z), 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/GBLDX2200099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfadcb3c1fc4cbe87c011122cd636a377ae464acf7a77beadf48488f27e8ed61c. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:19:10Z), 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/GBLDX2200125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879f4ea141afa39c2b0ce2171ebfbec056602e809804ad02238a457a3df29434. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM7282430304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d744d5203f8dd62a8fc8e664f04a565c1a3251d2b5cf3f988aac458819005d. 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/GBCKK2476503.