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 0xa4cdfd3b7115ed98d5b7e6fafd920b6a47f5e8888e9bd52dd9c11f5eb6687e0a. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f53f31d8-0559-488c-9e5b-8fb6b2fd4b8e.json and https://artists.proofprofile.net/proofs/artist/f53f31d8-0559-488c-9e5b-8fb6b2fd4b8e.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 0xf100ef2f322ba406e47d2192eb45a372ab027922a13d98dfe3d44534fb37b03a. 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/GBLFP2423379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dbbaede930942475bea6886d0b240c261f85c2d19da41c7c5ca131c4a3863ad. 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/GBLFP2423377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fa5d037236f29e259dad40648dc2cb2f1fe42d3d3d885dceb31ac49b2aaf85. 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/GBLFP2423389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da78fede562123c97b6ddc69f9ef6318524ac1921eac22d006db355a29221a2. 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/GBLFP2423378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ff614ad74ca10a2fcfe0da614e9b32126ced1056fb81fddc21934bcedbba9e. 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/GBLFP2423336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78179bd4c60be070a6326a3b2763b46665c6d402cf36e1ed5f0ab2d6567b36e2. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/GBMA22394634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882a96d7944e324172993d8037ea0497aff03d652c1ca8f0fc95597059b1a9d1. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GBMA22395796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd738b1471bfd631800dc4b2ab524128b72403cb7eefa11b6bbb363f96953b11c. 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/GBMA22395793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3731fed0d8b480bdeae49243e2a57b817642cd80446ae3d71c626f264db3611. 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/GBMA22395810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7879013f842265c79e00b4fb226695eed970eae28e44d41797ae2cc7b981fa. 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/QZGLS2545551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa96d98bc6e571ccbacfb4ed3430dc86b00eec3dd15812d0ea4e20ed0fccaed. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZGLS2545199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf894fd2540e21d1879061614a0fe8b287630c08c892c54404ca53f225b67230. 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/QZGLS2546069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa26a6852e1529bb08c1d55c99b2d5ec1d50c773d87960c4c7056bf5a6e6e1fb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:51:17Z), 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/QZGLS2563080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c84ca96031ab3dad7d7d43b31578f8ad9df0bbba26e6b7282a9d2256fe3381d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZGLS2546078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2bdb5fca732ba754248b2c4658cb447e7404a89968e445d361fe2ebb83e11e. 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/QZGLS2547261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc215913f3d90b3150ba356af66fcc81a178ac21bf0a36f578234da7d758c63. 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/QZGLS2546278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba22288bb011b7d5b652778cfbf1807852b2c48aabbb5797ba0b3ffe5ebd3da. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZGLS2545548.