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 0xe7a979cd66e1112b8841833b01164edae7752c5545712846d6bd69ac5df92988. 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/d3942e1c-ca3d-4cbf-8eee-abfdb29797cc.json and https://artists.proofprofile.net/proofs/artist/d3942e1c-ca3d-4cbf-8eee-abfdb29797cc.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 0x8813dbf9b844e7dc42362f6e5a49dab531cee7108635284bfbccceacd13ade9a. 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/TCABE1247136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5e14414aa660c372bc1158d2b46dc0d1f775de1d91d784cda79b3d23c2aafb. 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/TCABE1247138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0969e869e52cca2bcb34aa4ae833d1136bc49041376096c2e418b389da1c1dc2. 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/TCABE1247140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646957151c788349076e62e89a02934926783e25cb13d63f61267fb60890128a. 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/TCABE1247141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8cdd1e476c6a2078eb3163e693af3b06e081a3311376a76a578e31ee2215a8. 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/TCABE1247143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a21fe4da282c6add65898b785d163617e2810c5321166c5c096f3c2ad0bcfa6. 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/TCABE1247144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c1391ddd34894ebd8d27c1bab071701b02219b9608334637f63b66ee4b472e. 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/TCABE1247145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0b9f2ec16360a54e59bf5f6e68742c643c96aa77c77257a6aac90b94bd1eab. 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/TCABE1247146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc01ad57f4298e9338812d637bf33bfca6e6e3783c1fb27d7b40c63b2e9a455. 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/TCABE1247148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef082be7075a026488a1762896151b37e7f214fdcdd19d9b1deccfa49242c8d5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCABE1247149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13586adaf961c2adc3f8d70c25488f89c707bc56eb9dff8f21318da2a42db52. 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/TCABE1247150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98100d4a860d69f4559633715c2f1060aefb8070bdc7ec5c6ac9e43552b8075. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCABE1247151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15068c64cce7be581ec8b6f425329ce2192d4af8920f7c0e570b6d3909f37be. 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/TCABE1247142.
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 0xa53b2c63e3153359d30337e8c7feac622f0451a558b9f808aa9eaf3f7561a1f8. 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/US43C1100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d96c5cdb1e93a0b0c938d77f01a8422e979ce9bc4cb82d0ee207175b2566245. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:50:53Z), 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/US43C1100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1d1d34415d9b2d723e6b4e86caab471248354aefda9c66599ddb6f70f4424d. 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/US43C1100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67779188e36cb45b56be12df7f4f0a54eabea98d34affc8dbfd17258d3d557fb. 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/US43C1100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f10aa98edf4df763a1fddd81bf59cd332775a11dbe2fe67238be0d2ea8dcd3. 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/US43C1100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882d55146f25ec583c0394df37f6bd36e3d72839ab41fc44ba9399f66e00f925. 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/US43C1100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefed8a041c994e438a146479b3bab2b9157bffe239613c5e0ff837897dbd00ce. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US43C1100008.