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 0xbae0bcbb1a509f715c7a422472f677fcf6261d3272819295d2d2a8d49c76815d. 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/809ce891-a1d7-4e30-a1f2-0236a7afdcea.json and https://artists.proofprofile.net/proofs/artist/809ce891-a1d7-4e30-a1f2-0236a7afdcea.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 0x2de73620ec56050b771446969dd3cdb80ad3ed64a1ce5c9ef7713f903cfa4a92. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCADA1734106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1e17818b0cf6bbd943391801414161aacd05a865aa5a3a8cab5abf16f5d682. 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/QZ9JZ1798171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6537d71a46d2280ca26a2a50755cc67bd4ea50209ba716a1830c5af4bff5cabd. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T16:05:15Z), 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/TCADJ1722075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035e5972c1630e620eed897a52ad4c84db31cc1101ade714bdf41f2d0b489120. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QM4DW1817732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76df3ea4b6119fe0894bbe24efbca1a0e6410a08fe19740ff938cfd174a0194b. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/NL1LE1900257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2183533a35041ff5bdc5bf79197fd81a83696584f7ead8ecca56768f4e2df98. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/NL1LE2001588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d2b822de2bab9f7968e259b098de95e981973f88328a5ea1c898b0dbb7ed6f. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/USA2P2130949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc49916fb27ccb93c1a5f2e7cc8f0cc46dcf5d0ff39cfd096d10d40f40a2e9b9. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:01:54Z), 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/NL1LE2102338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8057200e54fa0a0cfc029210494931ed8cc6e9be04be02479e64f5af7c09f802. 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/NL1LE2102339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc529e13a0cc4ce821a4d3f00c96d468473c26988cc1fe37808d329ca7ccd0d40. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/NL1LE2102340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f6147592ede761d2c6ebafcf143d130a19908a29cdff215dc3893b8e4f8882. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:29:46Z), 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/NL1LE2102341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e6a036d6add98767e8a04750b83fecc819dc76a0f36cb984a8ebbfb2c20af5. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/NL1LE2102342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447c33bcdaac15a0c38b03d4bf0da077462546bd3878f6b7af19c019cab88b6a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/NL1LE2403573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7abf4c7375668b4e5dfedd91e4a33382b07a416693be4432d0d0c30456fd508e. 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/NL1LE2303412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9e19b908bd435fc17c4100a2eabe2493c043bfc0a51b12f89b82f0d6d5f4d5. 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/QZH6S1900422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db2b7241f2d25f57e6e1d78a0c27f56c865e9e0135b5603d414e5ecd71c01aa. 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/QZH6S1900435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58f3b76be36df892e5843eebdedb61a19dbc201ea577970c4434ae73c0df3c6. 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/QZH6S1900315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14248b3f825887fd09db29f2b66ec18380f5b8a50678038a8a76265089215883. 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/QZH6S1900331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939cee633316aba455daca4676b87c75dcee2ea907bc29daef5e25debd7e5cee. 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/USA2P1837981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662232b33c9b28013992fa1604593b44a7b4e8bc80cc81f141bdb1f4fe93099b. 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/NL1LE2303206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a36a9da622b686604bb78aaa6a13a23b722ac610cef07fbcfe8164625e5c94. 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/NL1LE2102518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c9aa7774667ab83c39e64fa4da29388141e8efe91f5af7979578ff35e41565. 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/NL1LE2102023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3ae472c1eaa28cd491ee616bad20ac4abf2907269c3b4f8501c028939bc169. 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/NL1LE2102422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd411b14b8e50c4d719010300e0fcb0c977690a5e1506079f4e147f51a4f5bee. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBLV61811339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de73620ec56050b771446969dd3cdb80ad3ed64a1ce5c9ef7713f903cfa4a92. 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/TCADA1734106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a665e065302fe14940a0ade099fdb8c3ad39c0fb99ebf545322c86668d6d1c9. 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/QZC5P1800196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447c33bcdaac15a0c38b03d4bf0da077462546bd3878f6b7af19c019cab88b6a. 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/NL1LE2403573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2025e422e0fa9ec59c2f6d0dfb1a9b79c2b52007bea888dd38f55f7b1bb8cf99. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/UK6821653569.
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 0xfbac0ed0c581b369b2366afce31879c4eb42d9a2679ea3a79988a06fd49a969e. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/NLRD51632746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34ad8eb2fe4aca8ee338df6466a2d0c6dec714384003fb3dd5968c75f84d35d. 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/QZC5P1800267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5bb6df2b8970b5d9efd2b78ecbbafa1cdbc6d077a595ec128812cf511c672f. 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/DEVF11900565.