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 0xd98927fd405d8d81ce6f05204215556a38c445ab85da7dcaef98a294bfc93e8d. 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/e9e53232-eba6-4668-aed3-de39e048794f.json and https://artists.proofprofile.net/proofs/artist/e9e53232-eba6-4668-aed3-de39e048794f.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 0xc9a8e426a59c6feaff3e970e7d8542a6aae21a9885bcf1874bc58ff9d8cc9a30. 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/NLW040800064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c5c4ce0b2144816a13ed49543a16ece5651ce5b0d34a2bdeceedc7af421a66. 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/NLW040700052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10db7ee1922787d1e439c136d2fb3086f0c2654c34b5006654b3b13176564bca. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/NLW040900090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987bb4f574b9a6e53cb17acfa91db4796bab7debec855ed28d072337064cf615. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/NLW041200292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987bb4f574b9a6e53cb17acfa91db4796bab7debec855ed28d072337064cf615. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/NLW041200292.
ចែករំលែកក្ដីស្រឡាញ់
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6cac2cf40f9f3feea0887a42c27f91abc26908d9c6fcbf56ecb61e29176e254. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/NLW042500234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10db7ee1922787d1e439c136d2fb3086f0c2654c34b5006654b3b13176564bca. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/NLW040900090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffcb5f7a01ff1f9a021cba8253da9b57b63a1f46729b12c4bd0aac44cb8a898d. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/NLW040800056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7cc1979c58acd7d11de09e747e0a8845100a0f86f2abf378fc12d8ef934334. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/NLW040900094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb1dff1bbda21eabdcc6f8b963291e1c971485ebd010e79a861ec29b479f1c6. 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/NLW041500537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33179b54885bc3a883e5ad6223402f01820849be845acbd5685c46db8fc64ae. 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/NLW042500235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9cadf815e1f99eebe536e1b7ee59539d0947e73dcb9ff2095503065dfc858c. 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/NLW040800063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c5c4ce0b2144816a13ed49543a16ece5651ce5b0d34a2bdeceedc7af421a66. 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/NLW040700052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ed9d14e56bd4d1c4a5dbdd1e1a2cb740195722b7b1355250fecdf0e25bfc24. 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/NLW040900093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bff162b9c86ab8d75416592caab442c320f1b5b1444e5774237f70389cf6866. 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/NLW040900089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad49c3e43d28ad78da5728b104b3ea902148af0693b327b638f3c29e29779d7e. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/NLW040700051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a8e426a59c6feaff3e970e7d8542a6aae21a9885bcf1874bc58ff9d8cc9a30. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NLW040800064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf459cfe6e30066d0030fbeb9bbab089935c7fa24bb2b44ea4ef18ea13c1a3f7d. 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/DEGL60900142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260de6fb529b76e58e6f585cf167d4d9d461e8c65bfe4eb62ec3ed2cf9c12161. 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/DEGL60900154.