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 0xbc9c611ea31c13d0e91c1819497b0ffbb606f215451cf6f06893ec422c3877e7. 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/787879ff-2234-4617-a778-6d1371362d8d.json and https://artists.proofprofile.net/proofs/artist/787879ff-2234-4617-a778-6d1371362d8d.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 0x27bc0b0f52b8db8e942e71403b433dd3b630ffe0b6b281a5ff9766ed4fc30f6f. 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/ITOGB2300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a070bd3acb675812ac1ddbf1b2506aedeff9d6b013607f2c90dcc4091d13cd. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/ITOGB2300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8934b1823f0910f7165aae57c477c91acc0a2adb6e5d2412205a1a563523054f. 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/ITOGB2300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64759752de68ce446d72f52b1e880677e390483ee0a03d916d5fe298612587e. 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/ITOGB2300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58136383755d83b0a2984c2fa3f39507b4b2345d46e90565ace3b89e9489afcd. 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/ITOGB2300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34215277d1362064ab67aa401b6977ad5f9adf773eb5d28650a90e52b31acf48. 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/ITOGB2300058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc382fa46b0180e3d44ea026d846f388dbae86af0036312c285d1c777250ace39. 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/ITOGB2300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3711df3759af9c10af79b42de4ff30fa86c7cbaf34ebec1117cba08d2d19ff4. 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/ITOGB2300060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58dda277425ec12bcbfa15540a0155f3864520995e1eb2dfea5128609fbedb51. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/ITOGB2300061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8c6002c9ad5ab43ac7221b10cab47a51233298f4491bedfd1c7c187921566c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ITOGB2300062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63503b7cfe51c93a4b68ce94c45c1b51e3ffb405df9c09b2b93051c3d83b0cfc. 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/ITOGB2300063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf802a4569836e842461599a02a105558e6042ce03e020d9b2e154dba0a076a29. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/US3DF2477781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb22e44364e104cc168f5890ac1327f42ab4015b724c8b2365ff13c3f116c1fc. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/US3DF2414168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f6c52afb2d5431fdce890da52d5098da9ac21ad76491c5675f2ce3d4e04071. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ITOGB2300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0a497e1c299e69c9acb347d5f2c2b640873963542241f1d430f6a727e079d7. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/AUMEV2356731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13ce4f0baf3e54b31eb4f480e1da988cc3a8dfdab18d1ff02d77c35e394febe. 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/QM3DF2221057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e7dad251096b03fafe5e02935b40422483c32f58216b4c6767f49bf48d4eb5. 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/USANG2291417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49707b0567241bfe974d6d822d87036a59249e061b46798a2e022fecfd7cbd01. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/DGA052330225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a3ece4489ff2af5c74cd14fe79efcfe6e408881565e9c0644b261d7b3df5b2. 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/GX89G2314392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b6d368ea574ff7c6dd3a787b5e5748e8a3bb575f8be624777eebfa247ee6ad. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USANG2238038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ef1e7fa6a4e12e63c62eb02afc818951f8aa6ff19cd8a8018fd7647585cc00. 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/USANG2232895.