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 0x5f9c1d16eaea540df48432c03c201fdf76456fab5b13f26793ea504e7f081186. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c6947d2d-d615-43c2-ba53-fac15b223cab.json and https://artists.proofprofile.net/proofs/artist/c6947d2d-d615-43c2-ba53-fac15b223cab.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 0x59003e0f285119bc93d232296b5577ad4d66c4cf4d00a2cb5e7f2e132d8bee6a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USCGH2392092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3b89c00603f4028b9a6e3dd56ba25532bf5201e3cd1e3801c1853bceb954bc. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T17:00:39Z), 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/USCGH2392094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80167660d50359605c8ca71220fb8bfb520d099675008ffa7f5d8305b7daf328. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USCGH2062204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197c8e2b9cf0d8ca9d41c1cd98920ce4653fa9ccea15055397127cc13a09f059. 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/USCGH2062209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda39032bef7b0831a1d88ef32fb17f643e27ad8917a9eb8b4533158ceced193. 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/DENX61188179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d8d74ad9f7ebc03d8c421670962c1375fe62845c9c57e388eeb95fa75b5afb. 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/DENX61188182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c22a73440eed3f7c42f8bc1c13a67f0dc2df23af5073f1ca25974c6f5a0961. 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/DENX61188185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48bbc468271c3da4e5621688a5d5146a0d6de2d8283275be3a98714db295766. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DENX61188186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719f5e53c2db54225813eed963f68961bef26049080f99fab2dc61663ecf480c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DENX61188187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81731339dcf734f875203970fcbb1555a6b2a72f81e342b8d5e536c6a741c78. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:24:27Z), 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/DENX61188188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a9dd8d2bbf15f34eb0c69d1489ecbc5819d8da87eae60d221efe593c10e4f7. 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/DENX61188189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090910f6face4df89733753496fa95399259d100c5814b4f4b4ffdc8378a86c2. 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/DENX61188190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eac241ab41de4a6f81ecd7540aa3780502d570e11534f8ba8c266d1ecb73343. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USL4Q1891527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9033fe384850e78adda99642d0fb43a2513f31ec5e1262e6f1d2eed96a2faa0b. 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/USL4Q1891543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd72e1eab2831a6bf01b5f499334d6aaf8b9ec9c3fbb75577084eb57921d9beb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USL4Q1891545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46bf9c228692e7d0151aec95ebfd7ed69e0b154fd8eb3d05aa421b0f3ab6fcea. 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/USCGH1929799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c952ffbb306c3cb274e40fdd8b98e25778bdc7b10a16e6186aba9e3232e6717. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USCGH1929808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22ddfaa666350b45e77f4e4b267219891ab45beb934ef60665707caa76fb933. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USCGH1929764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9942116c823490734581c836dcf0283e91e2e6d6b5d336c219c623fc5a229ebc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USCGH1929770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf102c2af0c6f0942b216682f0ac2217ecd002674b3971fb6074e308b27f048. 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/USCGH1929771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66dd8a74d3c9b7b2e07b1bd5e9a5f516b57e1f6ebf16c2ef42362727d7f56174. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USCGH1929772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85bb2df6978c55dbaf91c9f2a6b0188719fe2823a80028c672293f2ae0ace51f. 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/USCGH1929813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49700c13798e5c5c83da2ab74acc73ccc597b1a869c7c411cb018ed84d14f62a. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USCGH1929815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570d18c1943fb2bd63a0b707da1c454f44bcb4f6830fc06aec79825817dc77dd. 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/USCGH1929816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe71f89f0f830523772f22524b438323a24caa66bd51ed7625324bbc144ceaba. 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/USCGH1929817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576e9148ea379b6f9afe97186e08d01491a994a7b5e74481a921e8abf6c54f33. 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/USCGH1929819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b722c5c93736d3f09e44d680b2c385efdc7ec596b70a304711477fb98fb7170. 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/USCGH1929821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa647c302e8b8d994a3c6d0773866f3b4c01727e8d6fe7c378481f2dce6d9e6bd. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USCGH1929822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a60b3b8a183ba256a363cb5276a8ff5caabebaf82c0f2aa424da2a660d5350. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USCGH1929831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df6bda8ebd091c8125c53bbcd98866b8a85a2656cb3614591a1d66c969a8b80. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USCGH1929835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe45d2f5ec37e1926760075cb062f4ddff3653566a7f0f2eba2034332514a50. 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/USCGH1929837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5519a73436527aa6a7825c2dd10391119c0dbd026e16e70406a7583faf6ab9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DENX61188192.