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 0x3159010f457a8ac2c22e729bb475eedbcf6228ff49a26a629e85253dd5cd4e76. 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/431f8e22-7923-412f-b634-f622d45819cb.json and https://artists.proofprofile.net/proofs/artist/431f8e22-7923-412f-b634-f622d45819cb.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 0x31cf78a3fe4261eee9635960462c185598a1eb526009035a577f1d36769515b2. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/TCADO1868129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fdfecb284cbdc5bf7288ff3290e45d797227c8c2d97cad978929e812f2e6d45. 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/TCADO1868454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04921155598c772dc093dbf522b7837e8bc0c8269909c678db38011b7373385. Chain 2 (Bitcoin): anchored in block 957608 (2026-07-11T21:00:50Z), 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/TCADO1868498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1094bb75827d6957c66f4127a800582d14eefd7abd7ea9a6bcbabc9916dd7156. 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/TCADO1868499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6364dee2fb1624bbdddf505e0f9be559790778e82ca14ad11b5312d87eb26647. 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/TCADO1868046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5180f9db30a7dd3a8abdf8fe585306b592ed8807161fe2b09e3166f7fea5b572. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/TCADO1868049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421d7cd3c285dd59c4e01653c4dbf47702488d7968d976ecb3336f41fda98727. 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/TCADO1868058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65e0defca5a58bfc583ea0d0461b9e33d1ef71f70888522229152bc494ae0cf. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCADO1869229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc9ffdb7c2f26763ddbff297a4ca04f8b290e76712227f81f82e6b8cb2264f2. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TCADO1869234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582dd7b881178be61681e17456629eb766effc53a08ec5cd2be536494388b88d. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TCADO1869266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2d2e1e9a83af11053a9734d0ec2bdb2097f9554698112d92acea95604828c1. 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/TCADO1839904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eebdf884e46dd2854061efffb25999f1f28acc09fd15f113272ebe62d9d6ed9. 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/TCADO1868102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f4e7112474201e2e34d63d9eb7850f9caaa6ae7752dc4c581eb149fa2bde9e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCADO1868103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa79fadbf3f2a2c6ce26583955ecd85db4bb63be17a118664bf981595e07334e. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/TCADO1868109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4deb701dc6e1f0d9df8d282c62a4c13be4d3f31e0dfe2281b25ea84ff74a419. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/TCADQ1884194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91a152c014ae654f56439f8f1a51784e23e69cb85c39f85108a117980103b75. 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/TCADQ1884199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56752662bcc00e8d4834b42395ec2d059baf771ac698674cdbc3eb4bf4346e57. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:53:26Z), 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/TCADQ1884259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd701eae4cecdce9fa68c8bf46a54ebffe5ad5c9ca35ed7a54c1130070b1f0a. 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/TCADQ1884262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7ceb5121e84b0ae36132c8095e5877c43218874b99ab27d3af3ba0c2e577ca. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:09:22Z), 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/TCADQ1884265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ea0e3df20bad6f87dfd9b32e01abd6b286a62deacab731ef34f07a8c1edaa3. 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/TCADQ1884267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c762cf714c1fb89a70e1f86f5e081ffa27d916e543ef0e8f5f0646192a0875f. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/TCADQ1884284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa391479d59e9394272e4f042ddae14f84ffb214ffa13f8c751a19bddaf3a4a76. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCAEQ2077018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168ffcc25bd343ffb45d6086a745cfdbb6703a9303426be0ff9ad42e77e6e067. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USGZ22169621.