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 0x8403f8606b8cd27ec31724ca570b371b29f7a3f0d5c40c7f3a208a3503fb8781. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a1fa73cc-35e3-440c-86c3-4c9e699a8750.json and https://artists.proofprofile.net/proofs/artist/a1fa73cc-35e3-440c-86c3-4c9e699a8750.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 0xe00d6b014029869ae663d6e73a7575dffef632fb533b3885a0826cd609abbf2f. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USHM81679514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38cc0b42332a96db5e4dbd47a9e30d23d9781572b241e0eda30c551b1cc4edb. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/USHM81679518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f1c9f527f8d4ee71b772b4afcf0e14ef03ca693e5c02e07717e881cf5a79bf. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/USHM81679521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa749ef974300fe842a230f15ea7f327d4385d82740586f307a651db4c9dddd. 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/USHM81679524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341a242d54ee5297aa1af8e50d329016d35e17b1017114dc0035f245c0c6d454. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USHM81679528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c7baf6a4870b1845f7d5514f151b5edfb6a6f705b926ddb51676e385f62ea5. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/USHM81679529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bffb7aa37973a8e1b443b70e18c34e509888369c914e1c797969baecd9839b0. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USHM81679532.
Necrophiliac Among the Living Dead (Original Soundtrack Recording)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926a785772132c014273f61030885cf45f5e773fe28effb2387421715140924c. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/USHM81667865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d42d8d4f6bd8971db02033bed2c763b085c45a5a363a1489b3f713e31200a8. 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/USHM81667867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9f818849945eed535a20d1afa4264514f228ed9ccafa2bb8d9e12874af0f88. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USHM81667868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c39a16d0f8e898a9683e288d8379060d986844174ec7aee0346035681a19325. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USHM81667870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0d58aefe073663193e65d2842574018bf3c3421700c152173e4578267f9f16. 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/USHM81667871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f5302af22cab5f83cdcfef77fc4e3e8131bc15910ba87d78d5bea9ff0119c7. 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/USHM81667872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a313a375227e0dbc4b21c0469ea774965c5e8a3abd1d975d432c6b0d117fdfc. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USHM81667874.
Orgy of the Vampires (Original Soundtrack Recording)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cef81de67602d99edbe83986cee9b05527936d01d0381f3cda202dda394020e. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USHM21792989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3d7fa60ad1216955e30670d5c00cb0972a22fa20f2c6596c84f0e101a43cbf. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/USHM21792991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f57d638b851430746b0f07f47b8afc77b44755a43d6696836e93ff39c930221. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/USHM21792992.