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 0xabfd685981d2430ac5b22bad63521c9170815ea1ce56a7f9d90f5c03e31634f4. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2ce56e74-94b6-44ca-9276-fa100d222f82.json and https://artists.proofprofile.net/proofs/artist/2ce56e74-94b6-44ca-9276-fa100d222f82.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x28273661ceaf82affc0bfc715878415059305e48b72a3b64106f1247cbeea592. 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/FISRK1700084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa272d1f1c5c2e91fdc2b826731999a3af21daaeade59472dc9f99b26eaa291. 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/FISRK1700085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4164bf1bb3e24dc7e23a8165a04de5a48f7e34cf22bdda71215e783700a1b0a3. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/FISRK1700086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92cfa2c6531299a2affc59350f159ac05727688e3a1b56fe058264ca1ed28209. 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/FISRK1700088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0026cd0354ace82097f305c9e80d0734a30ce964c13734b2fe971e1b3b3838. 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/FISRK1700089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c78b2fcb068b5bd71f9dc605f542bb549c512532d27e3f592044ca1497d73f. 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/FISRK1700091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3206a97ff32552ff2b400ff58fcbf62e7535a2398ee2a9135706b51d3cf51c80. 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/FISRK1700092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21447cc15887c9aad6944bb8aa0cb4f1cf1bfef9e308e4b897b6aee3f35c420. 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/FISRK1700094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29016609453ed72e9f2b5218e4eb67161d19528d8ec6c8250f6da623b76842f. 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/FISRK1700095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbe0489da00cfb37ba4c12d0e79a23e894db6b0ac6691bfade0503b13df9afd. 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/FISRK1700096.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0c4100948d244409efcb37e7803343efbe26f833925d4403fbf3720a911044. 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/FISRK1700097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44dbda5a083e44bc4494fff1dca9f4d882265d0861751c439665878c0cff4dee. 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/FISRK1700098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0ef4ab77538f482260e0d554596f48546e41346616482c4ba9ccd40bf696e3. 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/FISRK1700099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a7bbf0f546848e68dd594df2e6fd09c4a947ee10a34609a9b236bd0f7f34e4. 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/FISRK1700100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d008d9661d1839f53e8c90d5c1071523c60336f37e4e0968ba179b327f69377. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/FISRK1700090.
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 0x38402d36e8bdccbfee3ac18c2a8e68ffd877e198e8ca1b132a456fdcdb88b9e9. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:29:37Z), 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/FISRK1700093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3240247f81592962d65f0ae80c2a4124cc138d5f04c42d6972bfcebad54843f. 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/FISRK1700087.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bcea271bc88d69b2ea9ed2f4231d8af5b3864ff121d0c94e8d76eeb90bd6cdd. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/FISRK1700101.