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 0x36216daee22811853d3f3da767681a466d4ab62ee588fff17830533f4d05e344. 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/ee0d20cf-4578-4e3b-94f8-8b0e14928998.json and https://artists.proofprofile.net/proofs/artist/ee0d20cf-4578-4e3b-94f8-8b0e14928998.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 0xa82e8c2ca5fcbf8ac552a7b5a8a60ac8721c6e85a6392327fe368486e3319bae. 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/QZK6J2344711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77553b12647c1fe89cb7cba59dedc388806ce47a032b26b07dbb6a95ec5d17b7. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/CA5KR2361228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a61e0b74a561da6895f735f7272cbde7ab84f5c8fecf3864cc589384dbc223a. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/QZNWS2361601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3554b6937b12a9010fb3deb073c6f6eff8626413f98f879957e28fe6ec27c65. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZRP42440248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c90cbdf14022ceba03107e070b10df76a7192a88f2b77bb833a6c76d99cab8. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZRP42442815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c50ff7319a1fd31354759f356ed5c26b641b1257242dc8bc24df409c0301f0. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QZTB32424049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d6ec9ca209a12422a228e7aab5eb49c77417a2479ac5cdc518d7f152338ee9. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QZWFS2440239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297dccbe7713d37af93f5c0fd9e2fdcd7f6759e2f56a13f96cf6c42615c1aea3. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZZ782450165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd991ff785e8a5ea25948d713a23421cbb38e6bb7a90cd2718a1718e8f030ee69. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZWFT2475531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71eb2c9bf90789ecf22210ffcf1a9efa43063b11dd0b357b1ad6dcccd26d648d. 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/QZZ7R2457245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb3921463703d4ae1c1662ff4cb976c0f2e21dd459a14edeaba91aa4b4bd33b. 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/QZFZ22515631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7a4331531d1129e7e3ae83472ad41c82a4898f9cafc763c150ec1b4ac21305. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZES92536658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53821b8bdc53c71bd3f5d3022f82c5794c62bcbe64ae974ad82618a5bd12a5b3. 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/QZES92536656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552c47224256dcffcf970f33aad5db761ef94b1d9b468c5d29b069c7e390fd84. 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/QZK6M2555430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c0965bb472620631af5bfd08b25c8a788c6a5ab28356c4f117adb9315f12bc. 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/QZWDE2536696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c7731c6a0f6ad3f552175edb95406c8fb661f1c74b92a7f1aca65f77dda66a. 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/QZTBC2536082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1edbcf6d6b58e46970ce152ec150541b42e88aabd599aa07dedd12d74a8ba5. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QT3EZ2532288.
AUTUMN LEAVES (Radio Clean) - Social media highlight
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2605c529ab8c5629748af4849507f94717794106f22c7bc75441f9a3aa714d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QT3EZ2532289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115d243a8d6381df38719ef653866577408083f869a074fcd81655fff93d30c3. 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/QZTBC2536083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951165b6bc2db858c7bf0b5940f92f0fc199846cff371dd1b7f6ed7221577e33. 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/QT3FA2587382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85fe1399bfa391b317f9cfee68569e01e69e53342a1272be0515b3445a4056b. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QT3FA2587023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db5136b96ccdb9b233ca6de76dcfed24e6056f5b7b6d059be2e6d7461fba783. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT3FF2555748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b62c7f060c708c728e9f8b8ba7289ff5d878166b94495b82c92e69ab3cf3176. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QT3FH2542971.