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 0xd4c9cc2d899af8ee9c92b2ef87d95e46973fa98219324d3ed90b4133ca622f7e. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08a0ac6b-8056-41b0-bfb5-2ef47f09916c.json and https://artists.proofprofile.net/proofs/artist/08a0ac6b-8056-41b0-bfb5-2ef47f09916c.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 0x3ce09ddcb1bf5520159d0353eeaae12003a7829faba61ed929872cdec8ee6152. 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/QZTB62468632.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e34580a4341421866957a4e1fc9185535a35d91bab6eb30b1ac3d4708f5698b. 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/QZK6F2463546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaeff1ffc3d870473d3579d163f0ac3517645860872ea943b8fd4340b2f00129. 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/QZK6K2488243.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b779b7b7a7fca5caffa98158014e719c25ba09f4797c086b36d61388021e8ca. 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/QZHN92479284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e8b39fd85af71f468cf56de05f9363d05fdf98d338105ff4eb8d1603e3a7ec. 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/QZHN42449689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd490dc6f2186f2309d18e04828e4fe0f256bb931b5c6ba7025dd1e171ed40302. 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/QZES82407667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5b7a2046d7528b7c9b60454947a2c1facfc88b9866eb9c53a6f14b4d9b8969. 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/QZFYY2490156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbd6dc8c36ab70cf7ee792b4af2d4546badd5dd1df07c27abc4fd785e0de070. 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/QZWFR2339953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de259aba4a06a39fb447192cb2b79f66c1007f9d1bf2151dca2aec52b4e5f5e. 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/QZWFP2382596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a9a25479c7a899fec0c95886845ac3f0eb1da97dba82a273a137e72c5948df. 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/QZTB42350508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e17fba62dd2d3c7a8cca7a89424b871c462b7fc1648291e09cfc5568a30034e. 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/QZRP52309001.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd327b8d7c50a3a1c8f78f6916d90238a201e8bb2baad9366e7bbb70da910d638. 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/QZNWX2328854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b0b337fa51870688817f22ca43585c7603d2e6cceb81ec55be2e1f5c63b2a4. 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/QZNWX2341262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197aed35a6714840439f09e4aa196e0b5fde11acabe80622bcbd9dd155f31caf. 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/QZMER2354062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c02fca86d02b141951e7e0c546e49bd6e65a5fa3ecdb15adfe75b8b17810581. 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/QZMEM2341917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac89e36f295e6dde278442ea140d2bc08905d5d107984145908dccf38e9409f9. 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/QZK6F2328547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7669a4acf576dc5dc195e780f356f8b530b70c0cc339c815fa1980a91322c172. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZES72334108.