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 0x782fa8dab13ed2c7a9b44178dfef9d2f71c026e365fd64fba9c8122dccbdf25b. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3608c572-2126-4c99-a8b4-858c86d50c3c.json and https://artists.proofprofile.net/proofs/artist/3608c572-2126-4c99-a8b4-858c86d50c3c.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 0xed5edc3d5fcbfb6af4b9940847ed44f6c4b288bbd33741501c081dfa438b4e56. 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/FR7LB1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0df081473ed002cc1576907a7414758273bbb55a96952c8940635b2367d564c. 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/FR7LB1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd4cd2f0594cf1a0e125f68b696ae6d719bf5f7ac168ab81731ab6abbae3aa4. 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/FR7LB1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65cb0646dbfd7713d9ecd75aad97c45a692088048ae6c8b4d7d7aeb1d217f43. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR7LB1700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18f986d80679b13f1c49e0f36705b242976c69a5de34ffd079ad189ceb185df. 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/GBBRP1236801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e25045222bb406b8e837c191276f16499ce6ad47aaa594119a79c5664e4a259. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBBRP1236802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4b3d2e5258096fe149c58d0be7ba3a90c889151e5b95ad1c31c7359ce5840c. 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/GBBRP1236803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8ba57118f1f1a5a185aad04b35927c019c083b4a2a981fcbb6c74807573c23. 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/GBBRP1236804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c6df3932ba67acc7c5f60e0494ba9b546fdabc64193f9ba11780aef5ec627c. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBBRP1236805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b59a5521352d4bf4daaac2b1aa16c4eba2ba2bb65dfcd6705915494003c468f. 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/GBBRP1236806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeead893abd602a13c7b43e0af2350dcc0998c95ba20a5fa3cb62065e5d777fbd. 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/GBBRP1236807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0258735c9f7083b527c3ed7ff4d908bb66088a7e67188da6c95488e83398a6b. 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/GBBRP1236808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1bfc723b5c7225e0f350173e068a1f0385f1d83a030b926ca83f4d2d1133e5. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GBBRP1236809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c45f5b3f2c2ca17bf42e58ecab3b099fde0e014e7229221e23cc93dbf184dba. 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/GBBRP1236810.