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 0x17f91162eaa8cb1e4b92afcc95f9f2f17bcc7b0ea003ff5a35ca3956cbefaad6. 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/771a780a-b311-4839-87e2-962c0cb74dc8.json and https://artists.proofprofile.net/proofs/artist/771a780a-b311-4839-87e2-962c0cb74dc8.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 0x29a8bf898d2191cf66c56de4dff678a06cb79d633e62257ea2fc5c2fa8914975. 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/USDY41554453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9301e728be8fbc8fdbf2c98ea2d58a92889e4f934af82b15e361ae6df6063276. 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/USDY41554454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954241a4684a24a7a21c712f492818d1d8bda99dc7ef36d64afd3f15f0009cd2. 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/USDY41554455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d38cadd4e8b81a487313bb9aab3ef8335f6430e641ceaf6b8c6b5ecd0a9df1. 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/USDY41554457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd844db43f5205646355f296fb0281ea67867423d7ffb33209deb92610388b3dc. 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/USDY41554459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49a841186bac774590bbf96756bdc755a97556d95a08ee3c7e9747c3865b4f5. 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/USDY41554460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c382efa6da711eeef34b0d528ef96b6b6212399a32389134b960c3e64b01c47. 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/USDY41554462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d46a3c54a72b45efb53ab550f5d5ccf3978a01ad197bc72e51ba35a185f871. 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/USDY41554463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3d3cebc11106aab9567b8bfff4f9b3726a45471a8faa5dfd65f925532a23bf. 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/USDY41554464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ee6ddf24e7b309ab807c735e7ea1c6be3064b110178cbeb5ca8366f6cf288d. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USDY41554456.
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 0xa23c93d402e0f51b413610b26bded56eb677308bf6076dfc56ac25f14fd55ec5. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USDY41554458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0642acb7af177356a9727f0e5daea7a36a334ffa94ff2196d087c3b3b12ce0ab. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/USDY41554461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267c561668d4c08f6df6e6f218e9d317ad059913e58ea7c9dd680aff3ef4eaf8. 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/USCGH1737622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95db80464c50fb1f62b26410bcc1b5a7673d77ff0fa6bead348ab27acae1543b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USCGH1737623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae947ae7de0fb8216d1b5acd2842f102dd228d4606d26cc3bed1f26e8a781e2. 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/USCGH1737624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f6d5bca09a61ad33590d2e858eec28a7cb2c4ea6814ec6788c534e3d615eb3. 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/USCGH1737627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea9f14c7aad772ecca5912c73d02c8aaddfc11d31727142fe74fe92f9208959. 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/USCGH1737628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3a9000b80aa2499b1f9e51168b948d20b0a8607a4bcd55ab472ca9e17dbb8c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USCGH1737631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc7527eb2c2aa7bf61b980f80cd80e177f3b182ad51a1d9e749364ca82d96e7. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/USCGH1737625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4d0dfa86f928275a70640e61f92ce8978fdb6ffe3137269bb0e8870d93ce4d. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USCGH1737626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fad2f5f26983159db89988c29931aebef74806cc4bc13d1003bd135a824318. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/USCGH1737629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76141d60605b41ef15b725947287105769835ef0011b7141749317e8a83d495. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USCGH1737630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91965401dd2f8a19e5ab2f7fcbc324c75f38b2cf2a9d23e4b1e5afa6308e66d. 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/USX9P2080505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214a227d3035b85a9d7a57b6952b1448a61ae212300e3a4f504ddcd23d0e98b3. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USCGH2076689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3d123b1351a778e200a0c8503c3b0b740875f59e0e674b3226340125e52821. 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/USCGH2076343.