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 0x4deabad8263bfb6711de4b3d6afdb6ef4eb3a0eacd7eec3df56be2692543fb25. 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/fa09065b-5c2e-4195-a67e-e18f89cda91d.json and https://artists.proofprofile.net/proofs/artist/fa09065b-5c2e-4195-a67e-e18f89cda91d.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 0x2cb4510e5789035a8e1fee5ff195836deeb0f83b556b662cabafbc431b6ac7db. 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/FRX202448760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c92dba4a96476a69455e733886788dc9c1495f8a57ea5ffbac386bc5af57765. 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/QZ5FN2471190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9f779410194597b77d7bce9b329e75f2ed61571e04bd85f1824911a8ccb0e3. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/NLRD52328369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7297c908161a65dcfb866dbbe3b3ef18375496a702992ad6020202f57a0c5e90. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QZK6G2345579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210bd93addb553a7197b8fd3aac1b2c93008cdb167929db60c0ce64fc1380067. 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/GBWUL2322342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a68bcb8cd67dc49d496867a8b2ee88bf99639f8ccf2a565fca152a899826a28. 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/GBRKQ2381553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b26530ac3086aeab744a0a8e450d7bdb4cf3436a58d72c6d160a99e6325cee. 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/GBRKQ2375865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe84574290a175d0d63aa74fafe9f4c1a62645cfd658b67dca7aaa8cb16003a. 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/QZ5FN2324261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e012615de3d550be55fcefc6bb42d0b0cf6108d96da088fa4900f44ef09cea. 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/QZWDE2216464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0c5cc99fb398c8fbe22e4dd36b538f46adc244040e74da694ae0244a6833b5. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QZNWR2242406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6d47148e098c12db63bbd6c774a457ae2468bf837b4e7754dff91a94c987eb. 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/QZTRX2390788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d5d3353991babc997f08e45b7a52991b4fc26683601b1574ad93b9fe2ee945. 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/QZTRX2390794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2a1cb88a4c1bd7f5748b9dd8ece80a58f4ee8dd6dde15cf2494c4539fb0a61. 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/QZTRX2390836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfacaa50b1909f5a35867efbcf5052661eed93f1d83e60dbe0992725d26f0928e. 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/QZTRX2390840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5c1b685f7a5e3f171e6f2747baeace02e729eda1bdbc9e3e0b49183c420a94. 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/QZTRX2390847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ac7d41a1ab337ea3a2b43cc23fd27ecec0f33ed8f5630e574a3f7ec5421f79. 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/QZTRX2390861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44aab305df68d8777fe8905ea0e3bf0f638eaa64b5de6a29333f3c90a21abc93. 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/QZTRX2390878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba0395903e93332a57c095d188e07cbb3a760513fa487072d66098c96d86582. 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/QZTRX2390881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7eb83618bcdee02cad854783e0b533a83cd2df0b0ad416ef4e041a7071f2ce3. 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/QZTRX2390887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e2664cdd5f094c600ff1eb40c16b954ba8f417c0625602c712948a8685ba8f. 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/QZTRX2390894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736c489adc58b9f0bd98f3277642cf9b63789be4a9f539bc2c5d6731c2e22791. 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/QZTRX2390918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4117823333c07ccd617982762bcd7a68fb7cd52b74197f2cb63886cfe446274. 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/QZFYX2513180.