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 0xd410aafbf7e59b8f429427a2b7e281597d66c8c59b3ae0530c925388b9eb6539. 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/6315f77b-75cd-4d56-bddf-861a2d72443e.json and https://artists.proofprofile.net/proofs/artist/6315f77b-75cd-4d56-bddf-861a2d72443e.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 0x466213801558ba036173551f27a5bd0eca22f74b8de8077d0f278ad082214a32. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/FR10S1991006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e62076662e61cd903934d00375c0c4440656c832eb6975a8a4b2bb043a0d03. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/DEE861902618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8827e8b5560c1681d84208c53e13e0e4e5d92d5097bde1db1b46b0afed6146. 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/DEE861902998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea52fe0c3c26ea51f882de352702351a9137971f435ea52c408fe95b43797e58. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/DEE861903837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900b1bbc367f5532e741c2ed09c1b628357aac07e5db3981046f7394d5425319. 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/DEE862001629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd00f93a51394f19b3357acc0a0ec52e161604054394393a8127a2a9a054d92. 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/DEPI82021523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3581a8cb29adb79ca42aae4daf270374b4dc64aedafce90d982aec0a9700551d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEPI82101444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9732e3318cd8a7c417aae8165e371b9a5b0442f183d20f71bd2859ec8f32a62. 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/DEPI82103864.
Change the Waters Vol. 1: The Art of Being Miserable
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d8353e189c14f871a586700041b453f8b8dc335a7b3fac785a087cecdb076e. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/DEPI82105878.
Change the Waters Vol. 2: Our Sad Weather Hearts
Change the Waters Complete Collection: Burn Your Past & Show Your Scars
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263dfef8dccce6ea7c7d78d9f5b2aa57a2ca9f42ae05e73ad80689dca6d0b607. 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/DEPI82102732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc6072577da91e48aabd1ac6d778c5fa826a70666b66725d6912dadacb1732e. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/DEPI82105749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539c400713fa7db913275191144d17c12c68df757dd8411bcd993af825c44281. 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/DEPI82105877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d8353e189c14f871a586700041b453f8b8dc335a7b3fac785a087cecdb076e. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEPI82105878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5598715253cb9f5bb0fb185d5bcedd1bf58ab2a7bd1213a535cdd8e67ae59892. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/DEPI82105881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5426e95e14c774bc61cd22808a2b13eff4fa4ad2eec1be0c9cd753ae831d6dc. 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/DEPI82105880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ad5970d9041c6de33539910e4c94bb62c602206e9ba5d7a786f7738730ec75. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEPI82205597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc420ad84df327737fc9c886b0a4d780973d5e3e6912fce0f8a2b6ef0419919dc. Chain 2 (Bitcoin): anchored in block 957632 (2026-07-12T00:10:15Z), 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/DEPI82301809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ff1bf647fbfe2060dbd10008fece3bcb74600c168f691895650eabf1902a1d. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/DEPI82307196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348bdcc5cbe12c7b15dd61b2f17dc273fcaf520aa6d2f99be98d9504d8d64b80. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/DEPI82312750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bcc3d17b3c81fcfd14851c0da43e54ff03918eeaca08bd912134824a2f0c63. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEPI82321852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8ee93e2a89bd925818c9344dddaf1c740ef4581b104454930298aceb8167bc. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEPI82301810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53970775bec23d6dce22797249e7f6e9821d851f2ec226fcfb849eb4b88631b. 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/DEPI82432284.
It Is What It Is Till It Is What It Isn't
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348bdcc5cbe12c7b15dd61b2f17dc273fcaf520aa6d2f99be98d9504d8d64b80. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEPI82312750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8ee93e2a89bd925818c9344dddaf1c740ef4581b104454930298aceb8167bc. 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/DEPI82301810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bcc3d17b3c81fcfd14851c0da43e54ff03918eeaca08bd912134824a2f0c63. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/DEPI82321852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82ef9f596e1f9c1ae173c2780380affb80cc9e42ae8a802637529a88b280c9c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEPI82404923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ff1bf647fbfe2060dbd10008fece3bcb74600c168f691895650eabf1902a1d. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/DEPI82307196.