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 0xe7c3c94507b77256192281a6dd77c01655d84fd20c8f9ead38c9058734c44df6. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ce10bdd4-4ebb-4c1a-b23a-10909f185c86.json and https://artists.proofprofile.net/proofs/artist/ce10bdd4-4ebb-4c1a-b23a-10909f185c86.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc199ac0d8b3cef48003ec18c94be147ca0cf5585971526c1ba2b382fe7995526. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FR6V80377236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750b6a0d7787a1dd99a79e119b80b86dc725820e502a22eab2233548cefbda00. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:05:47Z), 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/FR6V80377238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b450b949f72a704b8adf3531a1c03a8ff713992fbe600511af58897044431e7. 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/FR6V80377240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf615d3e87c7ba9dac90a4b16272195271125f0a781e9bedfb6348949ff8028d4. 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/FR6V80377242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf398ea74be8f3198caf644c3f808852eec679a052204559eff88a890c23b8c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FR6V80377241.
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 0xda6a86a231d91ca0231afd444c4b77fd9a92d0ffec4f6d44d707197e768cab9b. 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/FR6V80377244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a98f1d5f33248972afcc8dd0c4a88d42553cfe6689ce45224086acfca3ee9a8. 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/AEA140600254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5c75440c06d52f2f176f427996d151cc5cf6e20f689c51152c042f679d56f6. 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/AEA140600255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23294e96d75d8b0110836932a7c3e65ff0df56036b40e80132f120f9f3aaf8d3. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/AEA140600256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef799d5d01522c064820b59e1dd543623354876f8e79eef7988ec3b667237af1. 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/AEA140600257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75659fb8469de3685d1218b9c4ca35e42ef7b65d58d821d65642063f343baaa. 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/AEA140600259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38b36cb1ccbc137f1ac0bd59f79e1dccb82551791e8f45de04e9d8b470fb4f2. 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/AEA140600260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b29adf23d66dfaee47aaf8dc12bbce416273ea0c34a7defb112b98c9146b392. 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/AEA140600261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51e66b76c625c37f47d1f25af85d15b4396c804a959ea28747f04b1e87d0e32. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/AEA140600253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d079b5b7f3966202503a01874faecaed3c9044e1a623d5efddee7cf03f8929a. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/AEA140600258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc295aafefe0603c3622c9595c1020a959d61f22d59d21ecfb957bdb089a5d477. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/AEA140600262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8d8ad4bed3c8f9162a20aa8e1fb047952b6f91931d7922557891473bf0000d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR6V80349537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a6c6f9d2d9135a58fadfd6afff8daeccf3c97873acc939b89d52d817477046. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-21T20:43:54Z), 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/FR6V80349541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb698400138c754e996b9afcd2ddea75ee9a092e90da6f87414b18f489d1abf6a. 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/FR6V80349550.