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 0xa185e9eb4494e06158495eec03fe2a1f3f4de03c1f743c0ab569095df4a74d19. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6695a5d1-44b7-4507-aa80-c3de1cf9e7ad.json and https://artists.proofprofile.net/proofs/artist/6695a5d1-44b7-4507-aa80-c3de1cf9e7ad.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 0xce18181fb6c4818a300ada3b3e555a15f2125e8557afc4890f573a4178a9c651. 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/USL4Q1828359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6d8ff5db1802967082eaf12064dd135a9070f1d40b3454cec71266ee3a2bb6. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USL4Q1828360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8252659aa4142f93e6cc9fb78adddcd84693d8ff063455d5c10375d181227f65. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USL4Q1828361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cfa06fbf865c4c20828c699e70f6051f5d375f83fdad54d9bfb5f7e9f9f58de. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/USL4Q1828362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48674d1a52a00a254156872ee681f72a6bd772e8f15bb6a3623b242af0cd7c6f. 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/USL4Q1828363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a5b81dc3d8db19607e1d46472e3822a45238e5881b099d1dd51e63ea15db4b. 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/USL4Q1828364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8abd55b7194dd7835f903761409ca5881b3fd09a860531cacb9c8170f7bb19. 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/USL4Q1828365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3288b36ae81d6df1e56cde383036ba732d224910807fb3b83c62991bd3052ff0. 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/USL4Q1828366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6665b54b742054fc7d45f097ddbc00a9e742f790d0165d9ca0931ffe13ce56. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USL4Q1828367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ede13c8df02efccf6ba119cd2d84f02c88bc2c556a3b0cc44221e68622e741. 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/USCGJ2526460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d5483353353931bf2eff13737b66d4353f95efb87ff163d2d799ab5a6b4c70. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USY242430612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb2bbd72fa6c7f6b31b87ce27301fdcaf4688ef7b194b344fdd704dfa68d29b. 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/USL4R2457271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7ad769a44fda8cd81bd2097e3f9e050cac9c7e6de6aa1d6f0d75bc8cc81d33. 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/USHM82461623.
Ojos de Caramelo (Acoustic Live at Dog Island, Maitland Fl)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b79df460deea74d8686f0bb2302fa0305ac79f231d3b277669f47c9bf3be552. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/USL4R2326158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab21510725564a1bf793a6a28bbde6d988c706f2b17dad1174d52059c5c1cee. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USHM92233027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa240f4a17b845c13b10a6d2c1ba01c69354fc190bf1201ab4afbcdd8bf4ae79c. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/USCGH2189847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1869d09cf68d2d5c1f3f62cb29e68603a1c2c7f57076be12f004e4f4791aa2. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USHM82078523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7d6493f36f311bbd8f56b0582ae441e2b250a7fdfac296e4de52e5b8b42c93. 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/USDY41852007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56fc31fd70d95648b8185dd5db5791eb2f4570a88daad15ae45c298c6abd63c1. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/USCGH1881375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45902d7f8ca330d18367c8c8c877cb42ed634bfb96ba938739df752ed76e107. 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/USHM21767494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ca8d5504c7441807555800a4a1d8236d8740de1e785a1df7f91e794346cb84. 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/USHM21762852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1133f3409e09cd73dcc775a02fa33dd8d6667097bdb722fbef7fab1cb54737b1. 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/USHM21762854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b4390849d0cfbe2490f80b6fef761c00b28adfbc1b6ecd7838e2c164f4a2ef. 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/USHM21762853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce988c2652fee496f8e075e70365324a71a4eba35ce4a27c29a8e96de1a84e4. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USCGJ1851792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1527269369c3898caac9bdbc60c1b3910e7e9fa73155e1e9ae57f84b1e21d340. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USCGJ1851795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0f729d498028159acd1f919c69af6b469a74bcb128cbca30604136ac18270a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USCGJ1851797.