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 0xb1cf9c6162f79068857b1f3857938ab9e2827e36a72a92146f06e75ba2c92bfd. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/478f62b6-a2e1-4c3e-9682-4ea6d4da80ee.json and https://artists.proofprofile.net/proofs/artist/478f62b6-a2e1-4c3e-9682-4ea6d4da80ee.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 0x77a33f82008353c0eb14f3cc8cf80da5155e01f30970a85990545da8b6e99607. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZN882214128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd1b16322d54277a8aafb2e3d321b8603c6ea6c7848ddbe6d0bdaaea2d5fbaf. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:56:34Z), 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/QZN882236058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf455aa0891d0efd1c68a5e9524a6ee19781b7d923bebd177c137812c440c69c. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZWDW2301429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c8bb27cdbfc591c7decdb863b3c88cfbf4042b0fe5b1115ecb5ef74b07c154. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZWDW2301430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac51e8afc53862ce58448e59cc9c2f4af64384daf3bf6804d593c3fbb618963. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZWDW2226973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6bcc54342f0ca79c2937dd5ed164ce060444af8e5e7ce3a2de9f2e00503921c. 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/QZWDW2390792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492188227aaf717a9da35e1f2e2480777088da9e3c3440f69faab09c90f1a580. 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/QZYFZ2323939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cdc142e31a9ed6b8140ed6b34b6a0872babe0a453da3ccd3bfb05f8c98e286a. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZZ662326170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f68599fd95f023c59848b4c96bb4959be04a970e3dd25246b40199cd409a810. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:23:28Z), 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/QZYFZ2431690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d81804d1f8609a8c0cf12fa206a1af9c3f4a9aad11949c45f07d5b886cf055. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZYFZ2404953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f35c77ad72660e1d030d34d54500b9e5baf8106b7d7da4d8a1d691ef77c8ce. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZYFZ2431691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db6ab6a195427054d3035f20508acc1f41841be735ab078081cd7aed7817474. 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/QZYFZ2431692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6590172cbe889e0c6713dc8bb9d4b52ae44d322950fb5b822d7edd9e0be217d3. 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/QZYFZ2446389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f6a377ac87ab0c6601c7ca62d752e535d2a8bfcc0b1b968bc9b828dd57bd37. 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/QZYFZ2493091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb713f0a92388d5c74083cad68b4003cf96c8f7258af1478631ce1ac4d658954c. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZYFZ2493093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf52c20cfb5ac1f3499970ca3c2762c135e51a95970d71cd07cc70a3ab2f28d34. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZYFZ2493096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e820457c2f3348ecf2f3eead6e03d9ffeea436f350eaf738c20649532e1779. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZYFZ2493089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08399ed6804964b5aec294fdc8f026fa2c87cd3e25060de1bc203199161b685a. 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/QZWDW2454502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa889359e3979152fb41b30ed5ab1d4e43ea57ad08feda1b07a6299ca22dec298. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZYFZ2493088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8c18c0f3ff16da46ffc66d4295af1058be11211f78c169c512aa5e774c3f05. 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/QZN882297208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b908bd67750462be976659bf45c5b17671838ef4e8e6c578aa5c24be7eb2c7. 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/QZZ662429427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27641f49887ab01c2e4a6cb755729700409dd2431f67baa5fe3835d85bbf97a. 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/QZN882418343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487b196b626d3e8f2c40301e5d56c5e57da64d03aff9aa1176557e1d29b0adbe. 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/QZN882418344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd114a7e1807819c8da6ea7e908b768eb5a9f9905ad1a4566234dd9dc2dc7d572. 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/QZN882418345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575e01552508042072b49f8952e0acdd22075213393fd958d79e9287dade6cc4. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZN882418346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67085dc96639292fb0ce6897b64aadd99345c09dd88ef4da5a009758e13d9512. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:24:56Z), 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/QZN882418348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9156bd4e1770a1dba2ac8543926881219d7b68faca4fabcfc899ec6f774108. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZWDW2454500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e00c7277dc1f91269e58a96a6259fd5032fbf5cc5cf5480aa6235ba624040a6. 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/QZN882533531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3db9ea4fb2301bf835f70a8005964abbd55bb50ecf04de02d1a63544f3b967. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZN882533533.