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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789b7ad8dbd380f32f6bb71a6273d781ffc456a09a8ac14b5ca8eb1963ca85de. 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/1ad4de4b-0633-4a5a-8889-8f3a6cde6c8a.json and https://artists.proofprofile.net/proofs/artist/1ad4de4b-0633-4a5a-8889-8f3a6cde6c8a.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99ca86b9c91f962d3488fbb75a685fd4a9161d6ede4162a31192a53a3a34e10. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZDA72170305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e73266cd2100fad0620cd2f9629dccf0b0701a739c9b620e224ca7477167c88. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QZDA72170307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c36ff32011cbe35fca114bb0b153cc14e6ae2a8f2395aecc01a0d3d672fd83e. 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/QZDA72170308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44dcf911520ed7f6d652c799799fda045226bed836119a053ce6e5e51c8f1ed4. 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/QZDA62144310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dbe2a61431a00027d615e406fa42a5169f6cfdce22757dd6dbdb9b969af2ed3. Chain 2 (Bitcoin): anchored in block 957723 (2026-07-12T15:34:17Z), 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/QZES52163043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109217dd1c0c8255526c6021e384812ea4935ae4a4422689d67ff02f59642f3c. 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/QZES62274532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0b4566126af0aa9b330514bd72c5e0b12eae27da9c181036fa50e62d43d49a. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:50:07Z), 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/QZES62271900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb6505a3476dfddf47eaa705fe19b44b09962f58d5199a66c0aaece3a647b19. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZES82200352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc723d3c52f8c45170e7419adf7c195f7cfd9e98078c72d0be56cf5ae4a50ee96. 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/QZES82200355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4d0444a6ba1a82dfe6a713feb89cf2612dacb7d3c6ee1dcc816dfaa1246741. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTB42246151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdb0fdd60f743aae235f8af7a60624149ccb62578037104a3af8a3fb81159d1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTBC2422859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76f90abe42783b2d8eb422733506c20aba2cbdceedf27847933381e0525dc75. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:04:54Z), 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/QZTBC2422860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296dfee08a8331b24e1e4726aeb63703d4036f7d6e8b3f4c3be4afaa8672f676. 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/QZTBB2416666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3568419130669bd2abd7d44f9ddcd0b709f85d14f28a11f4ad358ac7c5f238. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTBC2422861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba738c8d397ddeede10b08bd44d72a42d86f63071e0c030ceb6850be3bc99df. 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/QZTBC2422862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6bb4ba166a17eeac160dd39b4480a8c2431afa945ea8dfb94405354b18bd7a4. 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/QZTBC2422863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a0df85499879529a43aafc7e9f4d943191c28c9337b27e5bee3de5d77c156f. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:24:04Z), 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/QZTBC2422864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3953966dece8aef7262c55f2b9e82c16501a9d21ad63a79a3dc71bd497a939a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNWP2304206.
Here You Go, You Do It: A Crywank Covers Compilation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15fa688ade511656685825b28f2175809755726ac3718fee4362ee4bc440d58. 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/USCGJ2202427.
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 0x348280bac17ae7b3387ccc60edefd2eb4a87fcc5ef4a10bc4f9a89a2904eac23. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USL4Q2488088.