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 0x9442a140269e8d5a48f35a06ab276f0c2f9de36fcfdd00b1f8f04e2dd4a645c1. Chain 2 (Bitcoin): anchored in block 954025 (2026-06-17T00:32:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/38fcc132-87d1-42c7-92b8-15e3953b9291.json and https://artists.proofprofile.net/proofs/artist/38fcc132-87d1-42c7-92b8-15e3953b9291.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 0x4b1595b08803bb24353136b63dd67e34c3a4baa358c521adcbcb10a2abad96b9. 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/QZTB72412971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8f32fa55307296defd6ecdd02739f0c68fb8e1045cc91be13b59d092df387d. 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/DGA0Q2306961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa84161c7c44685ba33e59311c7a54ff25b47ee446c0eb998b4c02264ff0130d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DGA0Q2306962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34b9fd94bc7526e1eba35e437861978e0bd20cc4ba82e8eab4b4507944a30c7. 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/DGA0P2337971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cf387c400617d70f86abb58ab8d7df1ed51ee073f1931278f3e10db356b543. 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/DGA0P2354109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd4e0747aa0980a7117ed236fe4adcf531ebe4c3b09568b0e852395b822b16c. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DGA092314976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fee2e0a7a21d9413f0a702daeb584e75537cf76e0af3264382b2366d80cfd74. 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/DGA052346007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5a66683d73e764c3a40bc2e437cb73573b0e3b31534e528e53dd66214451e8. 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/FR2X42316879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbec989f18bc1b8611fde6b77743a449dbe978835ff2de831a1d5f1c8eb2c1e6. 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/FR2X42316880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3b4572f6137710b3bbe31738e6d6dc5263169058b545863e6a21b64da61657. 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/FR2X42316881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1938b8fd3d958b08423a6577f905132be8ce7b00ff48488e1f5b0ee858fb1c4. 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/FR2X42316882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8326916b581ed193108576a0398899391daab3a5868c73e99735fce0ae5d29e9. 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/FR2X42316883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eacb5d136cf13ac85a754f8d1b5fe922c2ebc854b1bd530a32ced0d7ebc5334. 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/FR2X42316884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7eb70daab7979eb890f69b8376ad8b3d6d03ccfc89a59be07de6180b23b500. 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/FR2X42316885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556873902c77e84ac8491eb79941208579b1a8c5cb7a433b412a9ab3c47252c9. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/FR2X42316886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0617fad29b81b44ce1644d0007a0b75b01dee091286a0eef325aaea371494b66. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/QZTBB2243201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17da07c443dcca8bdcb951c34b58b100fef0835d005cea716521cb7b22bcb094. 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/QZTBB2243202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed208b72f4f234495bfe84daddf6c79da52cfe94499b4b3fc2dde50b8629b407. 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/QZTBB2243203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75ffd00cfe7b955855fd8ba543c8f25356035c365af380ca3030f6c81707d4a. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZTBB2243204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da9b67342e73b4020961ccbcaea2d1e9ae4e4935d01ad51203e2dfdb4420c4f. 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/QZTBB2243205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50782c0acee27c0525922643a609458fd61233a2152b277fa819de6fe055e941. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZTBB2243206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27af75ce919d997f7ff649497345358efbcba0b395186e379cd4080fa0cc34c0. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZTBB2243207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a2628a749f6ff4f7c460b8f9d5bf02c5702e33f373c27ad4925038c74aec37. 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/QZTBB2243208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0cc2d779f1944e9d120f13fc23aa3f58ae5c21c15e328b649d3a27bb459ae9. 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/QZTBB2243209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d4224eaba24d1c9e7e3c13f1d4bf928d788be92e9e0623753f940853df8a52. 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/QZTBB2243210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc928e7c82814f09cb50fc2abb13663972d673243d658cb9ad87e2ec6c452d5f. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GX8LD2385488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be3d0d3a70fbb816d86e44cf92527a31ebf288b8bd9a28871aa34dc75d859a2. 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/GX8LD2396368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f34644c0de9bb2bc2ded6d6ffd6c563e5ee65633f3343a7da1fff8d0db0af9. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GX8LD2314148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd877e78e90472eeb521494954174d713d049a9d2106faf1b61841169eb2810d6. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FRX872330702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29936335826790509e5d2192d7b4ae838abfd2820ef3ff311fdcea33b168ea7f. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/GX89G2232695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fdb29f58266ce7defbdd2473408fa7a9d1f9471f6dfb7ca330119ce1f986b5. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/DGA072231272.