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 0x7b622a7ad2be681c793cebfbbff08016a8d510e312d31eb3919cf716691ff6b0. 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/62b91b80-ed29-436d-a655-2eb306576a3a.json and https://artists.proofprofile.net/proofs/artist/62b91b80-ed29-436d-a655-2eb306576a3a.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 0xf7fde9dc8da1478cddcb3e9c4ffe3bcbf230540945d97162900c8b0aff22ab53. 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/JPVI01306040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5589dd52f3fefade8af3cb1fc6b39208396ff519a50b679172b1cee561a568eb. 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/JPVI01308440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7516d5a97cfdfd0c14f8927d8897788a8b40af6fcea0db79c0fb0bf830f1b3f. 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/JPVI01312380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334bf99e9dd6963a6033224f682fd78eb383470a25d70e7e3818694edb93f2f1. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/JPVI01312390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650cd80705ab675612e2f78b738cbff701cf7d12de51b3539aabfa95c56af061. 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/JPVI01312420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35ab2a90aeda041847810e308fa2224877324b74769abac73bc39fa412a7bf3. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/JPVI01312430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b81ca50a0d62607cf6406d367f70622a72c28e50d363c63a7e035f5c403c47. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/JPVI01312440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1fa14701d00bc9b21867c652ad9196b2b4b78f1730fe78e78ebe8579a6498d4. 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/JPZ922301108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520f36bb830274fe3f1227eba608f8c181aa38901b841ac8b3f4a1ffb24672e6. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/JPZ922301110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c08e1a7d9f239ca680d45a4fdaa8701cbe5d5c2e858dcff8dcab9b745b47bd. 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/JPVI01839840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cdc8c39be429009601127ca3344099d4e2722fb40961b2f2301f9e87c74f22d. 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/JPVI01839850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5bc3727caa31d36b42ed12ef50e958ecc173f2fca27d464a29abff31756a236. 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/JPVI01839860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27fdf7c435b70e0be8d3e1d4220f1b3a574e70a5b42a6409ea182ebbbcc034b. 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/JPVI01839870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150f22749144228aafd8407f42de29526486f5b44f95212cd38cbf4818d5a3e2. 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/JPVI01839880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e939a4ec4fda495059eecf3dc12c397a64889e933a5fabaab42b56530aac56d. 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/JPVI01839890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1349cce8dad193e6e40eb29389dd5bb75c36ecd0f72b53e4186d5aaeba6b8d3c. 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/JPVI01839900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3dc67eea8e6e66f1364b21143b58be8ee0d2081e2493c8bc315570a713a635b. 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/JPVI01720980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c462f9053e56956a15931c97429bc0071760d5e86db9f53df64a5771892c39. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/JPVI01839910.