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 0xe59b6f2a3abcf14c67b2bb8e31a8ab128929f2e646e95559699e04d8f539de24. 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/a4df9287-d9db-4c5b-a6b4-e71481dab694.json and https://artists.proofprofile.net/proofs/artist/a4df9287-d9db-4c5b-a6b4-e71481dab694.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 0x5a11db77ead55ea2aab6657fe37aef5e0c9a18c3277bb076efca8ad17904840c. 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/USA2B2318706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3295e67a9a1e81d94d654950f69ad1c006ca79d3a6aa969767278cbe2985847. 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/USA2B2318707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9084355b70c269a4146bbe87aa23b7ccd89a8a65efdb863c16e10c4b9f9b7b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA2B2318708.
43 Katzen tanzen auf'm Tisch - Acidbogen (Pt. 1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf771e449805e5f9afe6ba764207f1f4c6a06d8e3c8605d4f9af8d7401059538. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/DECY52003266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df354474058512fd9bcd72534cf644530550c452dfc863c74bc15a238268a3e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB7NR2330301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c07a64d4a50c27a8607ddad787511b67d9927d38c30e33a40ab9c7c200c9c1d. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GB7NR2330302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820d4a363ebcaba6795c2bd21025a88f204622f4c010fed6917249adaf1f7c63. 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/GB7NR2330303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7886895565fdd7dff6c27055e1ac80de3bec0c0d7c6da6ce4f5e0b248d0a72aa. 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/GB7NR2430401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317d4f95556820970d40ed93c7d4313ba5799a63f47ceafe118c8d3a9427e823. 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/GB7NR2430402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23eca615c113903734dfa75720182ae4b2468093303b093eb3e28257ba832327. 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/GB7NR2430403.
Heart Pieces - Nightmares On Wax Club Dub
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa208084881edb6f7b487f4f6a82a09fa0cdb7b65f62d6e047520da927078e979. 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/GB7NR2430404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3297b0c33088a7bbc1d4a93c329a13afe0f815f6d510e064bdf900e1f2cd9ccd. 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/DEL021707027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ca8568543500a3ab508585f0d528867b416a841b63942ab263c5ec188fd5ee. 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/ES8741825108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe08794957403b1ee960b2f45eaa0b040ddc16b69a87fe101ab5f2860051a5b8. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/ES8741825208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e3813f93ef8d283853254bce4e572f6a5ec6cc29addb4b3570c8d588d17db7. 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/USA2P1919805.
Ibiza Sunset Dreams, Vol. 4 (Compiled by DJ Zappi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0325c9c78ff0d314534f24cb95f2f62ac55d178797511840bd569db3572773. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEHM81600158.
Bar 25 Music Presents: Sounds Of Sirin, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129f4eb5aecfe57582aa114bb63e75c6ff4cb615ad149db0e8ee9afe3955dbda. 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/DEHM81600161.