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 0x7eea247b244486dbdfc881934f0c8ccd6ebc3904ea8ee27c1534b395a0ba77a9. 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/8560202c-47c3-4fb3-ba73-9e141b26a7e7.json and https://artists.proofprofile.net/proofs/artist/8560202c-47c3-4fb3-ba73-9e141b26a7e7.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 0xe95c3ffcbf474bae64536e5834c6e6d91ea1bdee48290e3d25418dff5f965d51. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/BXIV82246005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb03f88f263317d84a0a0fcb9d45c667cd94f186a2d6378f01915ecd8442b83. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/BXIV82356544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6882866c515ef966c13471b05fe2ce5a80053bbb8f628f3148884d2a4ae4d30. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BKPYU2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72037aa795bd53571ac497b5a62e921f1b3c9b05982f89c769c90f1471f79e5e. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/BXIV82480467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8821f5b50838b49c8874304d46f81fc85a7f753fdece81cfd322651ff7b9a6b. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/BKPYU2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661211d4b517dd83c72e35b37fee736894a5d74181a74d0843492f6421d39352. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/BKPYU2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d29562c41ca8f675e0378d6ea13ec616001b4e1a51f90c79f61e81c4389c19. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/BKPYU2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1dd55c4fe9f924976d5cb59121bfbfe72c2a6cc2290dc878644a5a254ab085. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/BKPYU2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd438729eb8a2ac3e2374438a49ba1ad1b2ff380d34e2af6035a3f5e172dda363. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/BKPYU2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063e716a88959366415fa9ba41608a367ffdfc1ce6c394087472b3d69368b295. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/BKPYU2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebcc2cc36919d99a3087a29d8ab174f66bce6d67dfe262d3819c12adf69ee143. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T16:28:12Z), 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/BKPYU2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756fbfd35370360915231a385f79e60bccf3f7d94e8438e1b57c4c59ffbf8921. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BKPYU2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7366933a1d0c521ffd7d5f16f4cb613f2a73f69dcf0cecd6749c8fb88473f39a. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/BKPYU2400023.