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 0x8a02094647021c0ae4ed32cd71c9c4e23e571f2a19d15c4106983964c738200b. 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/bf2860cf-564d-4365-aa55-5d65071d518b.json and https://artists.proofprofile.net/proofs/artist/bf2860cf-564d-4365-aa55-5d65071d518b.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 0x8d4f0111679dfc5eecc39ee1ae9ce8bcbfd251b747a609cb6f07e8083cb4becc. 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/QZTLA2455517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4f0111679dfc5eecc39ee1ae9ce8bcbfd251b747a609cb6f07e8083cb4becc. 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/QZTLA2455517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991c144ee6d5ab337489811a2c00af2d91a4daa005951280202a73ea893af46c. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T14:03:52Z), 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/QZS7J2492628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78845140b68ef3feaed9109fa834ff5524e2d9517b061696d865267ce153c676. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZS7J2411329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdcd6cab45996f253afd22cacebe66042a11fb2fa24873d1b5c94236df4eb6b5. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZS7J2431650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bba8e26464266a74ac6ba686257e9e85acf353f5b5174ad27a06fcb1cb7ef17. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZS7J2416783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0c98d1f034f6d77ac4fd62fd81e5959ab752f5a408c7514d25be3183879b1a. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/QZS7J2489238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77667d35521e9c497be545fd73b1aef722a4398da596aab34a7493a4338a8fd0. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZS7J2476234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd6001770f6b22fe45e10ee1fdd6eeb84bda19cc50a5a98111a6e86e486c07c. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/QZS7J2484034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555905ef45bbd91ac2fb145a9f3f165c16b6c3fefc0ba52f4912a8c1bcc64039. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QZS7J2425548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55d6a560189009b4b680ca20a0e80d3f337fb355ee408848e06fd6c2dbfaa02. 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/NL8RL2505572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa510ab1308c98d2bb81879116f482d6edbc17d55a111472bc92e0719bae47305. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/NL8RL2504651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6ff7e31c2c9f2029f4aa0808a0cff66a95a81f2dcdf9bd16d18394d733ef0e. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/NL8RL2504652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01bf3c6d434d86af6f674ae2afd96da0f36d0a1578258b0d923f62b436d4e147. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/NL8RL2504653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5eb061f02c997fc47ea4fefc14e31fa48d56c8e043ee933cc49e4e1d4d2246b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NL8RL2504655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34317e84ace9d61b253c486b317e60c29f367ba1eb5a5926deee772b03dc34cd. Chain 2 (Bitcoin): anchored in block 957661 (2026-07-12T05:37:10Z), 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/NL8RL2504656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba7b45f2a85f2eeb71dbc2fdd5a21b2ba59c072630a01676a5ea870296b3cbc. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/NL8RL2504657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6e523187c2331de7eb47048417ca4d3a9b20b62f4d1212a857357c880c5635. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:30:19Z), 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/NL8RL2504658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b86053bb34205bcd5de8eea74b664fca30b89ceb939894090ffb0248bccf006. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:10:49Z), 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/NL8RL2506320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e488b8fa0428337690f94fcc7afab7d6fc8e3f763c5bba41dea08f7dc05747. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NL8RL2504659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2846e7895d3db92103de4dda29b56b38b1f5b4c5d9064b1ff7386a40c6b5f7b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:54:48Z), 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/NL8RL2504660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659db0b034adf5673f0833ad9c215c53d87bcf6da21ae6110a6555217eb4e4da. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/NL8RL2504661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0093a66bc5ea345ac05f66eaa1f8ad2af378b26a041849beae5e2cafcc5104. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NL8RL2504662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4089fd024f9caa3c657bc36f5a8d4566f9cb35ccfc4e97a55f358e874167070a. 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/NL8RL2506344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709522cd63fb150cc2fcb0c6a1645f32a89ef54d08ad79b17a317f8aa17d6690. 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/NL8RL2506345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8e0bb1f6e6fdaea145a778665886333f7948a933db06e29798009d9ec991ae. 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/NL8RL2506346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7033555bc8af030ef8ba4dce9b4ded153604f1ac0d546428059fc4e9d3a74a. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:51:42Z), 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/NL8RL2506343.