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 0x3e49fb3d6162eaf2cea801a5240ce2984ee0b68c180a60763e13ad0b922b8733. 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/29d4d5f6-ecca-4406-86a5-5a035f6c2813.json and https://artists.proofprofile.net/proofs/artist/29d4d5f6-ecca-4406-86a5-5a035f6c2813.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 0x285c32edc4cb820b5583e83a0e713c0ec44193aea1e3a5f23a84aa6e440bd346. 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/ES5152100978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26287d01d6bdf548328fc989d1d3407aed6950c89b29035618e1157e70fe2d8. 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/BK4DA2424496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60b4d1dde022f4c57b23a797060828a3f218a0736b0ff8b1e5fe66fc876ba11. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BK4DA2424497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0274487b572cc22d135d7bef4347abf7deb48b373f715ed88a1b97ad8a5a07. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4DA2418875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47652ee6167ebddcee15d19b44a898f3fbd428fffc90d21d3c9f3160f19d3d44. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BK4DA2424502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c271a5cf835a1b6205a6d1a146b448be072503c29ed7fde1c352eafdd340f06. 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/BK4DA2424508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95afb6b8e6e794b81190d538b29bd5142ef6059c839101b96722c8c19969ba02. 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/BK4DA2424512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b732ca1aa8d58eabb0fd23a5416c7f7dec170ffda1745e7d99aebd4bd060b18. 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/BK4DA2308173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64ea81dce04d5f06e8dac890bda2934e4bb1f0261be98eb04429570a37d0ae1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BK4DA2308169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50375930884ad594e609424cd69ccb068a38796965fbca669a6502fb141d5ce. 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/BK4DA2308174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f3475e4baef8d0955430a14b7d032258ddaaac0308cc0ee0b8c7625368d95a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4DA2308170.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29032e970f507c4c5bb34ba296e5fa324604c9cdaf5fa47e71f8c70296e08bd3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4DA2308171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5618c397ca061012cca533438fc37fdf1ed05701d54feb235a31ace2d685a524. 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/BK4DA2308175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e21f74d93e2b48fa7c647f67490e37f40d30d454ab0ecba8d157bdf5baf5bce. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BK4DA2308172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98c8a711aa5abfd9017f7d5f7abc7a9896df8bda52a242f37c1a4323f7c70dd. 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/ZZOPM2120491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462ae0b707f862dcdc0aca7b05c1dd919886d913b620588604b2368270076ec4. 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/BK4DA2303466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f45089aca6bda7c72d776f3eb70d78baa18a3cf4b9afdb1a414994c4f608e7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BK4DA2503733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa0feb4b06f68ef13c7ff5281a72d13d4568cd6903b96d3c337af75d614a7bc. 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/BK4DA2502912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a96c1dd712ffdcb423568350f0afd3a58036c2a24fc465fede25c833a451b26. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BK4DA2503734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40f637ae5b9c7b3365779b38c2035d96a3fe959fc46c7b044ef3707e570fcb8. 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/BK4DA2503735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9431694a7009355f2472892032212445f18105f704f33bfa8b601c5ffd327b6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BK4DA2503736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b32a8db90ed43d804c3e7082119e70704b775303aa731d4ed32201aa8c82b2. 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/BK4DA2503737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042e82ac43335dc838bcd77aee8efdf2c4ee30559987ff40eb11870fb695be2c. 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/BK4DA2503739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b38d4d3d6502f07d6883c3d7c7359dbc0898f2e19a7967c8fab6f2c6d481e8. 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/ESA011846512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17c2f696420475d2d154576c0e357c3f29c1fb23a7d9384389408cd5c8dcce0. 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/ESA011846517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80933d222ebcf023f3a7f5ce176e954b7d3c29b8a9a6ed392e12cbf323fc1a63. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES5152500547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff01c3b5f4ca6a18c63673c55af1a542df724021968f83e58a26cf173c2385e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GXF9Q2490469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe413cd254c5cafea04fb0184bbca12fc6a6d936dec1a9fbe1e68fb89e21b49d1. 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/ES5152400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbe9d7c4902ccaa260353a44cd00257c1a93d42ba54abe38efaf198b80b0dff. 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/BK4DA2214550.