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 0xba57bba034446d69e49bd8f20adb47f9e7cb397162cb6edfbd887d81df987756. 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/03d3198d-39e4-4548-aaec-a7774cf3b895.json and https://artists.proofprofile.net/proofs/artist/03d3198d-39e4-4548-aaec-a7774cf3b895.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 0x81fb12cad3c01a93574f2a0e2e36ef98083ef223c2fe0264281bd4f82adb7f82. 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/QZK6P2363354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84325558802700cd7fee9503b578e234f86d47bb6515ac53ef48dd4e35e24b9. 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/QZK6P2363356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4b73cd12d0babbc91c6a07065b90f4847634a26479f2afb99245974a4c5ed4. 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/QZK6P2363357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f46b5343f159cf41d5795c952568541129b354ca8abc71f8c1e21d824c1e3c1. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QZK6P2363351.
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 0x79ac05bca6dc5acd42d252f3aad598196770b409b2121ee4aac4035888c027a8. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZK6P2363352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb803e28ba6425f0b50475103a82d6ae419c7daed4f5bc66d430afe122375583b. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZK6P2363355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cc67fe1a65b4cc8ad05f41ab1165189dfcc317e556d59484e7b72399541960. 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/QZTAX2489596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f51bafeaacffb2bc57821924f732b4f3625cbf58d01ea12cd688056535fc88. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/QZTAX2489594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9400cb208f0b8798e74f3845ced14dbfe2067e29e2a2258bcc3290105d298fdd. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/QZTAX2489595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3b8fca8ac02bab937d0a4d905e31fd148a0766ea957e464744ffec542e0cbb. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZTAX2489597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad8dce53a48956f6c86ac0487b41bf46fa5a4d84bb4e2bece947df6bb27ceec. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZNWW2455983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29e17b58b761388f63f4b0209b39355b185947646470cead28458e495001855. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZNWW2455979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720ec646a9c7e4f0aab7da08d0b8cfad29ba670f128a06153562b2916da6cd18. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/QZNWW2455980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc331fb3e42f7228ef87754244c45890b616f79a89c4e879ca13ad0ef25592fb1. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/QZNWW2455981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d11106ef902c393086bfea3cc6f9ea75866022091da2c58852cd096c200d84. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/QZNWW2455982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1080bd678bbb1c44df4425bb9442a60bb780e8cb3ade5014541c5268ee379f5a. 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/QZNWS2458692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2371eca0e19a318e194337d9510409e026c87c8f3d8126feddb3e84e8344e704. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZNWS2458693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1754e26d4895114c43137c5b2d7defff96a0599a3a2b6a99b5871da64eec5b2. 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/QZNWS2458694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95cc350c9ea343dfa0371dfc2f855d076e61f5002c3a6997bb60648698918f58. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZNWS2458696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5a86af96519c292df41c3067f4d82458800305c032daf4b8c9f3a61728b696. 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/QZK6P2361909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7761ce66d1b03a994b9673ffb00144647953c0ce6f4b5a1496e268c95c72faad. 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/QZNWT2249797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8122f0d238ae839b5a63d79bce0f806957360300b75a44549ec36568da34c8d7. 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/QZMEM2296563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6c744bcbce34230edcf7f35dcb0e46d19b643c6bda7bad3a244ca86d1bf5cb. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QZDA72200408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27543c47b84da64511063504cc30ce73d90a85c8254488c3eb52827d3d96cf3b. 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/QZTAS2182621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbddd546acaf5cb58b55344087bba3b43efb83066782ff06cade30d2efb715d0d. 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/QZRP52109708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d889bf07a0d479cf0ea1ac67943ed9fb6c8d3e0076accfd56587d0cdbd88a0. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZRP52101692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451b09252d4de71dfa1489c2e65559b0e6ce13ccba6f3b01a1b5ca6757029ecb. 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/QZNWR2145058.