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 0x12938ca620d0df00715a1055e6caf1d5b5eb9329b4a5b08f73fd911522bb4b4a. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2919a38d-7b83-40f6-a110-16f3c7b7ad46.json and https://artists.proofprofile.net/proofs/artist/2919a38d-7b83-40f6-a110-16f3c7b7ad46.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 0x070ab2193a133f2803928c45cb467c4549c2c674b8be5696ea7b816cf5fc7fa3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZZ662361353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb361e76473f38d7dbcd45ff53b91d44af38d6efe2a0fc5ba26e3dc2b5743e2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZZ662372088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730c7da4ede0261a489ca2e76224c4b12ddda073e68c5c35119f1ee0441a5aeb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZZ662372089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc05fc34786653526bfb2e98f6d9dff64c4670de926cf5471cf713362e74bbc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZZ662372090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396a5b528f83ba2364ded3a0128eea3ffe4f6d2aac1267dc82fdd025cbf5ed0a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZZ662372091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f62e475c01e059779b9f882a2e2303a054fb8a20f57d044ebf438115f5f72e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZZ662372092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77f564db6a595009d6f08c1b406346cf9364bdfa71054d1f2c46af959b91b8d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZZ662372093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb564df70b595323aef7f2faac7ccdd2fe08059809f2539e978906006d46425. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZZ662372094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45798a71690210f9116807cf9214fc9f77d588c5ed34d343806e6a1e11eeadc7. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZZ662372095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82736c9d88abc2463bb3b4bde46caa73847f3ec61ec2d6f9f7140dc4bc95bd3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZZ662372096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfddee0595274a81c199b9d5a40b7d3429e6d25298062e8694c17d2d9c685ab86. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZZ662372097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f779fb24efc7f654330e3d5b851c899d4d3fd8eb2e9006e1ca9f450aa563755. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNWQ2034927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb228ba438e87689b2eece8eb8cf056aaf947c91fcca7e1cdba5ee934d691a1b7. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZZ662404280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070ab2193a133f2803928c45cb467c4549c2c674b8be5696ea7b816cf5fc7fa3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZZ662361353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83be5019984d4cddc940ad9f52b8dbf02304acc8c4bc7d9974c8e6055e752147. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZN882229408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75d61d817f06c0088b4220db6da4b5ff7a14078ed0bf4b46161167e51197942. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZN882229409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456f3380e13a5b4e4a5c87eb12c26cd1177736be5263aa02d61f4697b41eb56a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZN882229410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e128ed37d6a6909e013008bf5c86f998d3a36fa2f5e8c844b1c6d72b8c1f026. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZN882200803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f7ae381eb200b6848fb7690ae5a0f6bf08e5ed7f2a43ab9fd4a6c79b274a7c. 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/QZN882229411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e128ed37d6a6909e013008bf5c86f998d3a36fa2f5e8c844b1c6d72b8c1f026. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZN882200803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315ee1cc597f378e576445d452f5ebcd51c37a88fb22656f13a04268c38a681a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNWX2105812.