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 0x9f6d97d5a72455a20730e2a92513f7bbf2981f6f08eff51bec0ee0b2d67cdf8b. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eaf047d8-9d34-499b-a31a-9f64d8a32ebe.json and https://artists.proofprofile.net/proofs/artist/eaf047d8-9d34-499b-a31a-9f64d8a32ebe.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 0x6d2a423544f854c4f355b0f13bc22acaef6d812937b979b4b7164bb0eaeb4d70. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZWFX2453901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb738f9ad041c109646b0e3981401000bb00bd3549e76285905126dbf1d5f3a07. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:41:09Z), 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/QZWFX2453868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10783e2308365bea0deaa5f2685bf6ef111fd5ce34c52891066570aa22f2ffe. 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/QZWFX2453898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36a9bdc13907882521f3d34f27a8ee7f9e900b495d5068fe7a585e3263ced8d. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:01:05Z), 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/QZWFX2453887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a0768ea091e1ea87c2430128a153070d989698e272b977d14c7ea2223c06c8. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZWFX2453884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f633ebf4f3d90b424d080e47b2d2a145a06b600a12a8223f99902bd7ed6f05. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/QZWFX2453899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe189cf68136b8acb26a93c7c65570ae7e31cbf898de11f2a7372e443cbefcca4. 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/QZWFX2453888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833b6fe6fad06bf6f8234342b1e92e98026510645b1862a5b04b841033b0c60f. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:07:38Z), 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/QZZ762438519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a45801cacd4bd0ce75455fc1511e37c44affc29b48ae0da1aff8601156d9fc. 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/QZZ762438527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b8f4bc7cf4fd77291ff6ddc0442b266812ffb74eb792f5520aa3e09d292e25. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:03:45Z), 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/QZZ762438453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c919192c70e7a3ec7b40993c517cd6b419eb9eb91796ed73f4c45e29b793d8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZZ762438515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8d7b3f2e9def36152c9946e339cdc9f6323e5148f62f7c6e089f9d8154d4e2. 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/QZZ762438530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9116d89fb50c346b2699b39c25d172319832bbca9daff3f057ece876a209d7b. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:03:31Z), 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/QZZ762438415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837084836d3b7ff441a6a0244bfd98410320a9ee6d9dcb3d59df1e69412e14dc. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T05:28:23Z), 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/QZZ762438471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cca89213098bc1809e4f60c5d016e4dcac2ee8e3d7d11887cbff0aad027777. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZZ762438607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd639a01165c1e6f5f0a7b5578f84fd40e2de0971f787c0975bc630b56c6a9a0. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T22:37:42Z), 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/QZZ762438432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6618dca6ce653092c07999ba69780e1d8248f7a759d8c78abf0b96e2031b96e. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZZ762438451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9781bf3932d0c09532e642dceafea9655e8b0248722d6250ff68f7cea52e8e. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZZ762438529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe658abde90f0dd4799be9579ce50e120b63d539d250f149d0f7c5dbbb0de2379. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZZ762438523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b3592d1c1d935c013d8b3ff2c5e144ceb0799f1b19a379bba96e7340ba13f4. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZZ762438462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202756f86dff0c829b558bf0d3438401fcb577104ee3627c39e3a8c112e21139. 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/QZZ762438434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123ae7c0df4017d7293382fcbdef0a01d0c8ff9e7b744f1790c2e317bb0c04df. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZZ762438408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0749a1b3ad125eab1f64b892bb7a454cc4f6a0b808d2feb648695a80c31c8bfd. 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/QZZ762438547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ae55e43076470e975bc3b73a385ff9ffac7438357c682bf65053f101b461f4. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZZ762438478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a1910fd829190ba7f1adfa22c8db4662f3a4e4ad655e274aff1cf3ea0d1cea. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:55:44Z), 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/QZZ762438546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541df19dd9f3ffb5d1f5194868ad81f7c5db89ab14b438cd027033af5b5a6d2f. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:39:55Z), 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/QZZ762438341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d57bba6d920e5968810fd5d03c7edd748a82c56685b17aedb9cd9d611c8d951. 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/QZZ762439053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36b2f422bf688d0a9dd2988fbe1d1dad3453bd0dc4903c24411cc978ceb3e63. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/QZZ762438463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aafa49682d0de40c156f152eb2d2e4676ca4ae9c5e7efe336c0be2e3ca8d315. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:02:01Z), 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/QZZ762438550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c9fbba8377ad014c1f2a6c7c61c70e3fa9e42ad82f3b06afd2a0dc93e497df. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZZ762438421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448b0eb3c60ca957d18180326537c0ee025059e24a6e15d91ddbaeddda35a8d9. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T03:50:09Z), 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/QZZ762438346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91cd7719f9d476a8900ff17023617dbde643c3fa37781bf3f4c60d4e7ee4309f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZZ772470473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58af6ed083b6880c73acb19676a96a7b1a703f4ed86cb398f9d22aef80b23d5. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZZ762438562.