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 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 0xa17cd60305aa621cf441e19ef229b5b290c822c80ea1480d9a7a8cc443bbc58b. 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/c41b16e7-82d1-486d-b7b3-b569fa80c825.json and https://artists.proofprofile.net/proofs/artist/c41b16e7-82d1-486d-b7b3-b569fa80c825.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 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 0x004a75c5c5072be9aa21748daf45db1fb54146b14bb970520de7fd728b005ca4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHN81968823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6368dc9f5ea810b4dca7270030734953219b242520f2653fa46958e1525fc90a. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZK6H2018519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f551cfe81273f4331e9c023b6f19d785b4bd63cd817d0f08adfb2df6a1e598b. 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/QZMEP2297217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f2d1769ba139b300b880e48a9f7d26702f2003bf2d4605a112cd29c599ccce. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZNWS2206339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4652d8f2040038868a9dcf4db478bb6f31fd48cbc523b5535a118e6f8826bdc5. 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/QZTBA2259671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8001ecc9d422f5b41792aa5c93429f18861383e95f92ca8a119fe78cf4fab2b1. 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/QZNWU2355367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8139162d57b0998658e63b31b0c8d76fcf195017ee52353e7dc7acbaed4683a. 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/QZTB42322861.
Sorry I'm Bipolar: A Collection Of Mood Swings
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab40a2a4d526be7a909f32711cc63ed822976993263e25a61b88689578c568c2. 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/QZTB82350874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed24ced67f50f9f9a7cb64f5669d5e36494cd3f73120b81b258bd61ddd0db74. 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/QZNWS2206564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8139162d57b0998658e63b31b0c8d76fcf195017ee52353e7dc7acbaed4683a. 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/QZTB42322861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c4968128c23339f899128acc2b62ac5515c29f86d2feb67bff6a043a674dfb. 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/QZTB82350883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd120e84d4124ef45cd50b2c5bb53d49504647646aef8d2769e208d5a764fcb. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZDA62499811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428366d38ef240af0dfe47be852385a1e8b0986452ade39d728f44ca58b6a3c9. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZFZ42561221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3dba36483816a494a6e0b0bfb3e1b23b418d20198f151c9a5f94736719a7e0. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZN882560128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c39b557ad1a571a505608fd7c6298b6b941ab95d1df9576abcdccd7e57d50e. 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/QZWDW2515684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4aef2d4bcf8c5399fc19aab5edbcc51e4a91ed60277a28b8b04079092037ff. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZWDW2520984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976cc33f93b5c8de080c9b6448c6fa7055720f7767f2579ac8ac5d8e5551f8a9. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:41:55Z), 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/QZTB32568472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd97d8e1093f55065bfccf14786cec0a27228e51a86c14afaa934a2f5595730. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:15:23Z), 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/QZTB62579108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e73b508104f169bca2f1aa2ea403a5fa80c64d9765c1841726c5aa6a0b28df. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZWFL2554440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7afe719c2ee434fa8a168d9cded8a3d9612881b21faec9b57fa8866a791b65. 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/QZWFT2562477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3b71a64d21970fe7777c7b1e5022b968c399fb51a0bc1e8023c59bea71fe95. 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/QZZ8B2368785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6a5ea57e8be98b5e9577c7764ec9459247b4f63884d16025388a3ac975940b. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/CA5KR0040094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750ce31f8b914f640f270cb0542a87a0b8a3780bc63c9e770e2ce3dd0f9baa20. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZN882541199.