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 0x909d67c381439d1c4d420b843e651cb55349e6b5bb2e36d3da1eb1f5992d7507. 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/e04ec9db-c679-4692-b157-a7b2f5f98e84.json and https://artists.proofprofile.net/proofs/artist/e04ec9db-c679-4692-b157-a7b2f5f98e84.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 0x442ff4c31b5ce932b178e78cba1c594206f58bb21b3934c687ef0665217143f6. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T03:55:44Z), 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/CA5KR1702830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c455250f84087082e462f30f1341c3d6a96b1f1471443200b208cdaa58439a2. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T08:00:12Z), 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/USLZJ1843300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55b5c877c65021a05c1ac0c12cb7287318482137f8e33b8b9603238ec2642fd. 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/QZ5FN1912653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4daab9fc048c504cf0540b7358c3d956d59f2fdd39f5ff00e005fda2f2bc495f. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/TCAEC1903341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36068a1c5b8adf05dfe0838d9a260fd3117cd02cd1598c42816b8508897a9c84. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZ5FN1992839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebd3329b5ceb01878ba38237b1a0e0fe8413b261c37741daa260ab069ab097b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZ5FN1995290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1020f4361bed384c3971e7e940b81134f74c484c2355be9ea17d1c144a3ab7fa. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZ5FN1995292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b37fcbe213d43e6ef3e706c7d9f2a51be3569ac2b0c7c80675248425aa900d. 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/QZ5FN1995294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36068a1c5b8adf05dfe0838d9a260fd3117cd02cd1598c42816b8508897a9c84. 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/QZ5FN1992839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1940d85d50dbfc0f81e3af75203d8e4cbb6a13e9b017aabb06a0768f0b7b4fb5. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:44:43Z), 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/USLZJ2039606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd9a7b71e31f2adf823e84017b5de5d8e319299e0ad794b5749c3ca4fca43c9. 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/QZTAU2154131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c10e7a2878087b19207e31a6a552cd585b848e220bf1d89fc8dacfd896170f. 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/USLZJ2501625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ae9cb3defd53ae1ae7fea2f6fa5672a59b71ca26eddcfd5a031ac67ba5fa83. 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/QZTV32572797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd28ba544eae3ebf75e8629e6fc4cb28fc40d60f34a0e03aefbaa0f0cb6847d. 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/QZ4JJ1632936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10eec48dd57366dac0222d6120f044eccca0855079ebb38defca590be7721ea3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USA2P2002233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10eec48dd57366dac0222d6120f044eccca0855079ebb38defca590be7721ea3. 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/USA2P2002233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311c178a366f5c1f2c8590b23ecea34b505e0e7d3d51f84023ce6c06a595e5a8. 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/GBWUL2046646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c1d2fee01ea24e979cd239ea6eaddd6153fc0457b815fa1c682c372e335a32. 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/QZ5FN1803733.