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 0xd75d8cb19979dcd67638a80fd1d887226afbf9871a1f6e74b5b7097dabee6c91. 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/245eefed-53ac-45ad-9e69-a67c38d0537f.json and https://artists.proofprofile.net/proofs/artist/245eefed-53ac-45ad-9e69-a67c38d0537f.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 0xc9179611ae056bbb98863585ff0e40eb166964eba2816f189cb8662163c93896. 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/QMFME2012369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c5236b2714366793d37e0afd937376774db328fdb88605097073723f6f75cf. 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/QMFME2012370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37cdcf87ac646a245cfb1bd498fdbab727d3065c79daf085d3e8db31a1ccc4c. 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/QMFME2012373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2ce6ebc569cf3e1658f8c67425e0ced3286094535967f882704343f2070d4a. 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/QMFME2012324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd4bddee0e95249fa998fb79eafaf3d23e0396ac7d87c826d5f5a27f4b9b5ea. 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/QMFME2012362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37a9eeb8f3bb205e207f1816fe93fc836cff106a0fca510a4a5d15dbe5e54b4. 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/QMFME2012361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6320c412bfaba71bafe0eb4c8b5cf12e76f4da5926b6211f0b78399ab6e72856. 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/QMFME2012366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dfefaadeedd660904c4e5a0507bac76c574a2593b3eb79b5a136ecf8c4b97ea. 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/QMFME2012375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea584fd366ca13e01da4732a5a4b09bf5990751320fb04111f216c13465e4b7. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QMFME2012371.
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 0xe9448fd6dc7c85d2b84610dd9e925b9e240f6772432b1925fb438f8fd6a0da34. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QMFME2012372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e38827fe99f252c9b830dc3d15a2b3d3c2e6da2e18287b2b4adb57663db7050. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QMFME2012342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3155b864757f3669863ff12c78c0bbe3630c2848819dcb6603f7f11cfd5eee46. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QMFME2012346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ebf9cb04643070fee5da3888993081c36ec57474b242359cb599a798a97b554. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QMFME2012374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6534c4909c0b55de0be85431152216033fdb9828844cc7fa74743d6c6d7df0. 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/NOCWZ1804054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc2b5c29b9ef9ce81eda8a8da1c75086125a6973378ffb7a2ea7133823be9f7. 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/NOCWZ1804055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4888a0e0082101a53eefc58177116b7324477789363a37f90707228c13b57b92. 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/NOCWZ1804056.
6:3 - Exhale 6 seconds, Inhale 3 seconds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5455813c34102e99d1e307855fb659acbbef8229b127babdc8f16bea48ffd094. 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/NOCWZ1802143.
10:5 - Exhale 10 seconds, Inhale 5 seconds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37eeb513630cf5b94f0c0576af1ff4fb109b8d86eb209a872ccde025a05f411. 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/NOCWZ1802145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c01b260d9eac10755e003ffc65c8e8d46e3a1f91704624c3a76f88b693c7751. 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/NOCWZ1802151.
8:4 - Exhale 8 seconds, Inhale 4 seconds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06acc46e4ab3b71990579dd6c51235be17b82ca9902d9286db6212f1e273906e. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/NOCWZ1802144.
12:6 - Exhale 12 seconds, Inhale 6 seconds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563b72f5ed8aab5979f0b3fa9514f4929058b0d3d2da318dceb07cf1f3989d92. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/NOCWZ1802146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16cc24125eef474c7cf8400eecfa69a777ddc80783548602c21c9db52200a96e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QM4TW2319566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de7a32f1f0d34f6a3ce441126f3277fdac620b44a179ab985c36fe1378092c2. 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/QMFME1957962.