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 0x822b4bdab509560c9dc65cd8de5ad6070b444f89ee2402d2f102df228e978998. 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/6d288d7d-103d-4354-8163-d1f448aa0634.json and https://artists.proofprofile.net/proofs/artist/6d288d7d-103d-4354-8163-d1f448aa0634.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 0x5c7ba12b341db523aa9e4e033666de07d5eb822cfeb13dfeb4a37f6198d4c83b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:06:36Z), 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/QZP7F2527645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647644ad43403f09c290257bae514ebe0aa4b67a692194e367b94509570df6f2. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZP7F2527647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb1bbaebdb68d9614b2502db91ae463d1590d362dbc0448a61c766cca50d59e. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZP7F2527648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ef2b413b8e09f7a49762c790d2af26a38f858b18de1c6917ead24d4629c0d4. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:11:56Z), 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/QZP7F2527649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e00194c1bcb9461718e5fbcface72cd02b19390ac26820a1420ed675fbf0e13. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZP7F2527651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc112acf943dbab9e753f50a0f6ceeb95b7626b920180df787764d68017d3f95c. 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/SE5IB2289025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92cddcb4a7e10d05935115cea6d4347a0099cbf71cff94c25bcdcd226aa8c7b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SE5IB2289105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece611414514f6e8b39ba471254c2020a4aa5a6d5fad8d3ad69f8eed337e9ee9. 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/QZP7F2527629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96beba9a83c4840dc3c308dd1c6b7ebdad20307c04628b4922dea538da7bf52e. 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/QZP7F2527630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c885b6e39535c3db6913ff3ee6022a5786091776c241e9342fcf48b059ca18. 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/QZP7F2527631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f119c30253f38d7540e57179d4f76175dd46f2c80e8bb24ee146f6c71fdd3e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZP7F2527632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3556544375bf80c3e6cdc60234f2e58957323c6210a985dc972baa2718adca66. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:58:11Z), 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/QZP7F2527633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ac34f4f91f66891e9766f8f058872236440cff098ff7879b7b5ede49965dbe. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZP7F2528028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785fa815cd32db4ff615e1796646528bae9e44801013c36baf2b257750a477b9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZP7F2528029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0e126ef8dab21c4eb2278b67c41dde6fa8f5f833a8b8ed2c36aabce1587679. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:41:26Z), 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/QZP7F2528033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611ca1f0d8e3003fe3ff466de0c3bc89f41caa8cdfe18304b2ab7a3294d6e35c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZP7F2528035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725f616fedaae58a007e574ec334ca73a65db8d621e6cc331722f3d3d62f73c1. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZP7F2527660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79abc1e70e0660eadfb2dee247f63aeb25cb41663029c26756985d4c327092c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZP7F2527661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fc73750d5f631c125edbd55c038e4dcab7d8ea49c6947fae2ecc94b06bafa1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZP7F2527662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15d18289a7e0bdf9f97cdbae551c76ac088103a896cf7fe92da314cc7306b0f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZP7F2527663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7262988c91d56f234cc5094e8308e746f27a3970096a9197ba5cbd9764a5a6f3. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZP7F2527664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf631007e473b0d4a780d9e99f72ad32a5d34e41377f13f1c80bcb567a53ce400. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZP7F2527665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e36cd97d593fc6280f6f586da6e1835bc0a50b6003954fd97c3c96b7954d4dc. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZP7F2527666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c428e221882513be9d42e5e31e3dede5995c98e731b4142cf74279a1917694. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZP7F2527667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa778320820fc16b8080e5888bc409adc7b4fbe5bef8bb70c3be7e4857b7ad9c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZP7F2527668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32714592712b1d4fa330b173072400655270e0bb09a67162480f30e97981226. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:41:58Z), 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/QZP7F2527669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d89e16afba972115e4c83004c0fd4ba6f9f8591dcef5c092616a82575d5a61. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZP7F2527670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ffc5375895893cdedce93c79f9275dd12ae22c50a322564fe08574c9d049b7. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZP7F2527671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5bb20d89d210895be87670e149291c973d9c536922051c872ccee382fe1538. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZP7F2527672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c9be595922f1c42ef7baa9d7173d7885b6404cca08f69e25e23244aae76662. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZP7F2527673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e75e2c3b0be5178243275129f1a2864ab764f036c4221a7f4b2f4f3560abb92. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZP7F2527674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df4b349385efa2a5705c58c097a0e4f95577a4d365b5993b91b98a92f2b7449. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZP7F2527675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae4845abd61edebc62eebc96262efa9bc90c2288cb3087acf801833cbb7d59a. 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/SE69Z2410010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92cddcb4a7e10d05935115cea6d4347a0099cbf71cff94c25bcdcd226aa8c7b. 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/SE5IB2289105.