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 0x6676f842a63a465b43811c79e3d5ad7647e9b878d359d088a9e86018dac5dd3d. 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/71a294a1-5713-439f-ac70-a9f18b929a77.json and https://artists.proofprofile.net/proofs/artist/71a294a1-5713-439f-ac70-a9f18b929a77.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 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 0xe25288621a97540ac7e55d75ce7a2bb8dcbef5e06afa11af540ee6c119c3e482. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/ITLU51825890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54019b82c95d6e7d3513145b08e5093566c572f2a50b322ab8283973eed5f6f2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ITLU51825903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0e938faaef7a7077ad11ee1ef6a6deb192b9a5b884c99e82a3c5f892fcc529. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ITLU51825904.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8653f020dff30e4ef21bcce983e78e38659ff516b92c8251969606b09fed6e7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ITO102092352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69663b443c5d1ac6ca7747f8f115b13b0eec21c28a033a875863647a24c99bc. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/ITO102092354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa966e74e60c6a860c0445d393f7a375bb94591c1220c8f387d5664c8fe046d24. 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/ITO102092362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb989605af7e070ed9c744ded50b307515fb5509456af74547d2c01b0f68af7d3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ITO102092364.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2512073c6dd184760a341743258aceb8e6cd22f2669973e8fef7bc41208c34. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZTRX2580977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55469f0f235aed004722f94ba2e8369c7b04d14811d20054891027a507b6503e. 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/QZTRX2580983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247aaed785f13e84258d9fc24c758181c9ef9808c041ca14cfdff7990060afbe. 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/QZTRX2580992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ee3683b477d0e7457f4f9ac534e661c76c20541cbf78aa8cbc600f433b620a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZTRX2580999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751ed332c2ed1f024648a500bc5fc6204fbd17a2a8dc75674888821231314edc. 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/QZTRX2581009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17012d68ce2168f705e18d3595980537b7497c9ed2207461cccb71ab87ce083. 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/QZTRX2581017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf52a0f7fb2735239b0fe9979e6426a8d2c56b31f57727be8945fb4394ea9e9fa. 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/QZTRX2581023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1732cf7a74fa1a12c9bd7288e9c70066bb750a3776813c5b3cbd6166096500. 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/QZTRX2581038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90fa0af9cf39803e97119635faab35816c67c02f7936ac5ba08f905825599eab. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZTRX2581046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2593abdb1662a81ecc5ed9ba364e5d555a2b7ce7cde7cd34aa4e4deb9ade17e. 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/QZTRX2581054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9023a9ff27223a4594ab1445528864d32eda43ef6684871dec3ee6b32c5ec5. 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/QZTRX2581061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f428f3c5d44fd93e7287ad50d518385e54a980ec70b96d1e527740dc4c78987. 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/QZTRX2581069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6038a4433015a438addff25d07156a07f22709fac0f0ab22547b28f76f32db50. 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/QZTRX2581085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6bdcd863f42a27aad8c9309a2007be3acc56f800f30252b3df8179ab649e08. 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/QZTRX2581093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc623ddadf943f67fd15f720c7e536d220f72123f97e3550e8d849e1e6a822b. 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/QZTRX2581110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4db73a254da5dc6b5f5a25642a48b549a5fa9630ed636745423d00e39f0a38. 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/QZTRX2581118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac07fb17e3175005fd2202372db859c700fc1833db94888d7eb3a7bfbe3bcea. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZTRX2581125.