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 0xb4eba637f507643bdc5769f16fd664cb366f64253ba8f95cb5736921af701d89. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de891a6c-00e7-4364-9cf5-02441e5063c2.json and https://artists.proofprofile.net/proofs/artist/de891a6c-00e7-4364-9cf5-02441e5063c2.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 0x037e65481aacaa926759b0f8187f8360e1c837dc0f0069d004c702d711c1964d. 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/DEYW82414280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b452b5a9e9219833cbbd9f532004174313efe8c1f53360e4b665af8a81c7e1. 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/DEYW82414975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29d67660c48107fa33b7c126aa3743ed0274f8b79faef6724d1ecdc859bb700. 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/DEYW82501156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff84316f0edad96afac1f57b264c6ccb4e8ff3b999121c98a3909d56d75ce91. 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/DEZC62570624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf5fc8c620ecf46877485c625e41cca34803340e6f639e3c828d6e81ad2a7b1. 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/DEYW82505793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6734af00074b473694adcb4cbfbf9e53f8d0ce6eb6563e54bba56d2486fdd244. 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/DEYW82505795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2a9995ebf0cf64b76a540a8d73007da56bee6507b70f1fa3bfef8ed42b2186. 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/DEYW82505797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf01fb490f1668330b75f67b3a4b69aa590520035277e5e234cc33a58de3af8b. 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/DEYW82505800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a31f72d76cd1d943cde0e116ff829d4b153f7ffdf69e0c8ccd186027a69224. 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/DEYW82505801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83ba855ce32b3b1bd49be66f9b7a172b721fd2abdf0dd40ef339a993c5533f7. 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/DEYW82505805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb790b7ed31d426ea44a75e5feb8a08ca924b8ae698382664cb72785184f24856. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/DEYW82505791.
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 0x88104b8574990a12ce7e51276dc3a5a1560861a6cb0e74555ce0b97c8aafbe5a. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/DEYW82505792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0443db7b5943e8de1396d4802425fea1bf0325fcde50d26a2ab9883494ceda. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEYW82505794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb558859967e31b72b2108d50a23d397c7c2a74b7e622f7ac092e82cce61e68a2. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEYW82505796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee44879feb3fbea2340947bb19777a767a8122998607d40e2db4347531329acb. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DEYW82505798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821af074c10af3c9a798d643903ac86e08ee0188c189a2a0138b135a28eca99c. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEYW82505799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec0580e9d71745eba53f770e753f446e227116883b0e2d1c98b3c63093f0e8b. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/DEYW82505802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc8925d42485bb5c2a15b918d3b2e4835d8913f240fa26d4a5266f91820f432. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEYW82505803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0daf82f1e8975f3de277950547ca8df8dd356137b9f94163258698db6e713618. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEYW82505804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268b399cb19945844a05cbf50dd646e59e14c5ad3e2759d60f010b07e5ffe3bb. 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/DEYW82510515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451eb92337db216a8dae9bfa60a52f6683219185c8da1e7913af8ae4bf7bdb7c. 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/DEYW82510516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1847de94e0c5e861753109b2e4029d044bd7c3c16428522d3c226f5aa3b0ab. 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/DEYW82510519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122a5439712d05bdb26d697ebce937f2e86f38eb1d74ad3eedb10b65d2020179. 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/DEYW82510521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd60390723d615357b0e5874a8f4663473e60708cf3dfe624b1204a1d90cb95. 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/DEZC62592225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7380792a6d7a2a01495fcfd7f92f04acb34eb29fa2eda345e50b21d0bfd8b2c8. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/DEP552005815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78583251f69318992e29be15ae82078bb8f1783488e285781a67c60477b93823. 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/DEYW82415725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38a506a30ad47cdc4a41266afb80a4ca67619fe268b905768ab05400379cb5a. 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/DEAR42557727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6858f35f55c26a8a9acce0dacc44a942f5e266b9f973fdff1ebd15ea167b9baf. 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/DEP552005398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd885c16db2545aea4bcaf59f3b420d2b83114d18d6eb7dd8eff978bdae74e287. 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/DEP552005400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7639ba1da0de64d6b4e837320b6bbc82b9256c5f79432b9dcff23b0716aabd2. 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/DEP552005401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68cf5995a952a75b8aae65e36a39192410310161c070753d25741e8cf7340b6. 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/DEP552005403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26457acc5a84eba418b5043ce47d46c7239aacede8f9afcc07a901a4017ea95e. 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/DEP552005405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dfa9bc1ae4cca96114605179a6cb3dc60cfbb608e93f65768721218b04873eb. 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/DEP552005406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa85c82a1a26c91f4f3595718cc31161757e2450fdd36c84f18d2968e5221b1. 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/DEP552005409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f636952bb1f538871663ee5423c340c80b553a47d1e14d479f95fc965a6ec84. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/DEP552005404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b213226bbf1ce7c04ea665287f4befcda016d968bdfa5339c3f551a751f35f. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/DEP552005407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b368d36ee5439180c879df5cb8c451f48ee2b29404e81a12335be635c15b00. 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/DEZC62575241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4cd2f0bc35abf76a5d7e08b88699040cf254e102e29ba6725fc64d5c4e16ac8. 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/DEZC62587003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3689153052ee1202d2d5f42670fb4682402c52b4fb5f1836eb109bdd2861bc. 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/QZZ7R2474297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f30b192134d4ecbfcd69ea050025cd05e9a68ccbd9ef54cf99d5c7ffc02d1b. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZZ7R2474296.