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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 0xc50fae4d8175e948a8662c3c94a82bb423b67fff308cf74b235b1adaafc6059f. 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/e6caa706-0ca7-4df2-848c-8e3fcc90a5bb.json and https://artists.proofprofile.net/proofs/artist/e6caa706-0ca7-4df2-848c-8e3fcc90a5bb.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 0xe52b8544bad9bbf02b8afe908b18430d645574dcecb2683724b5053a21840376. 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/QMGR32184712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12405d6e1eae6eeca3f79ec8a89fad6dd870ed55ee308333d439dd7c0e2578e1. 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/QMGR32102872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d4485bfe4bcbfd0fc7c0b2b75e41780d69b3d9a61b50cc0f74fcd7e327a429. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-22T01:26:05Z), 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/QZPEW2201391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85620ca20a643da677a6b76d1a5ceb1dd41ef1e3c44ab76431902f1cba9eac8. 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/QZPEW2201392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991afb96a4e23bc8f7bf519a517fbb4ddc612a40940f30a69c206de2135db929. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/QMGR32116820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b2640dc3affb7e3960ea620645cbcfbe23767f2814c2505af6c74531ea927d. 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/QMGR32184430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f15b20521c2fe3ace41f3cc937b6b6579ae59d591686344f09e4ebb7a6dfa4. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QMGR32184502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f9b80d7ad0830faf3adabedacd2ff60c60fddb866ea9ca7f698655398955e6. 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/QMGR32184536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d61d91a1bf7f0c31bb7178a75b89db2963792355d254849dff58ae571101be5. 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/QMGR32184553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39deadee5fafd0ba584ee1d4af4ebf41e747c37885f9c9942db61a9ebf9320d. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QZDA82079919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae9478bbdb0701fb4fb9f1d5cd4dd3c891bf317680b4b49cf12339a8aaf00e2. 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/QZDA82079920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b4d091857cb97e651acc3c3a42640327b79681553e8e5aec404c83549f6cde. 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/QZHNB2027803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42a35a69b6acd3fe269019b701d236b0ed41654dfbd8615ca8f0b69de176696. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZK6K2028231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad285fd5ee503321066dde53254aee64890fadef4c2d8b29fcba5f5f415dc2fb. 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/QZHN82076218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5971cfbab47855d05d0edd188945ff5c24dac5de49bfe701fbfcd2c13a5b2c2e. 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/QZHN62032068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd89e0c6ff72757b74e9af7247105995df7791951b3fbb005a90cf67f06c935. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZES82014981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7436d6f8a8f2598ac5dec206b21e4edc4f1e55bc13ca8fdac74d8f0bb93b1bd4. 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/QZFYZ2021600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29d4af29f0ea6195cdb6b3879fb221310415b6e15cea2309593cadd71bf98e0. 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/QZFYZ2099572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4374788a1c393f8a81ce321de3289c68fe2394e2c8b995f67af7d818568f2b. 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/QZHN61936106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb097e466b296336e21bd95e0e020663b2ad6e966f732889afb58bc262a50e64c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFZ71955831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d84b8ade092ad6d4f0c90da9dfd09084092d28c75b5317c4c81652adc484a9c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZFZ31958994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f70b52093bcd06d27404f23d30817242330bfafa217d4e57a69ebb7181a4ffc. 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/QZFYX1998345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4455629a74ad2dbaffc7fbfb12bedff6d039ea2689ce844df18cd16419a7e70. 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/QZFYX1998347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c82b00f8e7eaf98135cff2d5508a5822fc31b6e62e5950d14df4408128276b0. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZFYX1998346.
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 0xf86e15465051741cfa15587d75d1833d5569e4884f43f3f2a9d27540e5c16f00. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/QZFYX1998348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1f6d30c161d52a5cca7e94451b207f2f19381266dae2e22c9537fac32b8dc4. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZFYX1998349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d634e4440a890263d13571f97bc3d1058e694f4b2065bd92d0f729980cf933. 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/QZ4JJ1807914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530143b4e3cf81ca9e01be350f039811b0f4c463a00c10c9af99a57829b8208c. 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/QZ4JJ1807915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf479bf62e91ee8cd7760d273d8b472f56d12c4bb080da9b9830f87ce91505e53. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QZ4JJ1807916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31b23edd481a1574e1d749ffd750ab27158cfdd40c34a60a75cabc7c01c03d0. 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/JMA271500676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0206ad98edb69170c35367e3394e9fb5c34cb25225d7a4eb38653c43993899. 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/QZFYW2000527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc503fb7c5bc3e30e353d99391772237dcdec37a320f1055fe5374b4671fb719c. 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/CH7811101353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd944ea62f307d7b949af416a1f3e433e384c0fd9d6c0c6721ea03bdbfb7a719b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CH7811101354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c49f6355e5d48a73b544958d607265c926ad1a021b482191438a122614ddcb5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CH7811101359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1991d6b336c58f116121c2b46ca38fc3962e0b437300297ca2a184ec72919e63. 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/CH7811101365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a0f356ae9f497e756c42ccb68e35da4de43931b3a2a4d41fb2645ea6968c15. 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/USA2P2035633.