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 0x4c6f8409a24a292e456d40f46e504ca7676983287b9740b9e4a6eab9f097deb5. 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/415e9e28-c196-4013-a02f-ae9ba55deded.json and https://artists.proofprofile.net/proofs/artist/415e9e28-c196-4013-a02f-ae9ba55deded.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 0xf171a850fccddfed39f73fa8a78c09a52de3862b0dd01d786d69adcd66fb1092. 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/NLG661600427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6380a24aedd2e4501871e5c95f939f19afe5aca2afdf49dccc82e9f772697625. 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/NLG661700423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6380a24aedd2e4501871e5c95f939f19afe5aca2afdf49dccc82e9f772697625. 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/NLG661700423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbe9208a5142e753f8bc53b913d6459da4e46887ecf65f36ebb8562edea7199. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/NLG661700551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4aa630e7e9142a816de6c163605d7e477068803cd57d9bf72c18a257b919140. 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/NLG661800732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4aa630e7e9142a816de6c163605d7e477068803cd57d9bf72c18a257b919140. 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/NLG661800732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb01dbe6b84192685f56a57dcc1eda5d938a20e333da9a91f44ab005796143e9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NLG661800764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43300fc8c41293680dd609f6fc15b6f153b41c21e5d9bb3553c53acaa00b868e. 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/NLG661800766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9019e2e45a82b7859602c649e2f19c6262a78b016247544009faa5ff568692ab. 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/NLP761900210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e9f401e0eab756e00b38cb984e2553c9479eb34b3ce229dcf85813f73845df. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/NLP761900239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d318c68a4a1d4f48d59ff479f48b21feb656bc6c5affab12b99768b1e005ca. 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/NLP762100051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7bef411a6a0509df82d65f2348d39070294b36acc0cd71a7c442493acf6c24. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/NLG661500265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd841e3df50b1c4abfa036b19391068cb970131209b6e946e16fd689e36ca8b82. 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/NLG661700684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9047ab1d0d153c42ea9f2d214492d42b1f6e83b95fca171e6857b29f953a62. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/NLG661700353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ff18632f81f92759c2a17b8ce2c919ab912364bf4362a1b7a6ca5a7645c3dd. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/NLG661700525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286fc4c3c63a3cb4a09f2cc11dc4b81cb6813b2a11bb31e52b57f9e5c371695a. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/NLG661700259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3975b98f3f86fac221412eb1eecbaee86e24c018d7a27147eb675b4d85858a28. 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/NLKK11500165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fde61780c797b1002f206cb938b51bdb68d81f42f3070b45a393941d3b5dc19. 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/NLWL71800059.
Body (feat. Gio, Mael, Brace, Jayh, James Watss, Lina Ice, Deemer & KIMONO)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffcbffee725cf3f341e662a8eb221a739cda9c2ef6fb70a5ee573575eb2c52a7. 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/NL1XU1900035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6899e4c3e61fa47f14a3f1c23604f92fbfcc692a017e41d883514a9ca8bd6f. 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/NLS241700321.
Nobody (feat. James Watss & Kimberley Janice)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265e9baa8f1d29c043d9de2fd238795a03a163149d65b779072fc07eb3312c05. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLP761800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751573284c688b208bb2452a3d7503670b1bc3285d0af70230c86fe45d8117b4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLK2U1900227.
SUCKA 4 LOVE (feat. Jasha Rudge, James Watss & Elijaz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22a3ab0a373e5fad9c12c8387c1171b57e84d0e6658aed765088e1831089d53. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/NLR9F1800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd841e3df50b1c4abfa036b19391068cb970131209b6e946e16fd689e36ca8b82. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NLG661700684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d8bfb9c7580f901d9a9651b67ab64f64fde8a367f0d939e461398df9879fe9. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/NLG661800390.