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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 0x742e4489ae0ad344c30cb014071042653224212c365d933a551a3d603a25053f. 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/d73d5dbb-9495-4951-a610-0b5c70881209.json and https://artists.proofprofile.net/proofs/artist/d73d5dbb-9495-4951-a610-0b5c70881209.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 0x94da181d8e0ae29ce18a947e1c2554e9de68a714bf79cec34b737839251b91fd. 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/UKGCZ2400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc879c26b6b110f41f23c08df9001ced9de07d423ecd90131b36aa1cd638776b9. 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/UKGCZ2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabddcbecd10c6eb823c0e33d593962e83dd5a852d17d382d5a739b98072417d. 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/UKGCZ2200059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42453781f8dafa6150e13321fcd0d85981e178c817b116e3e5dbb6f8d55f65e3. 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/UKGCZ2200066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676e950f74889c63813aac55988c571d69d21d54691569262eb65a786206d867. 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/UKGCZ2200075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b34d695830b1d89b0d04381132fee12fca704d9439b4bad02428436678eaf0d. 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/UKGCZ2200076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc6bb460c1f1ed2f8a5f906ba1484573e81d0d4c7632f4e5507b38321fc7648. 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/UKGCZ2200080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28c820a89a33d3de0e1a2eb52e1d50d5282bab0657d33a3e48ffc4a467d3825. 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/UKGCZ2200081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc38ea1d90df86a0f10f3c22c024786689b48c0636573f39a0c3bf7b494d168c. 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/UKGCZ2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc4afaa7571a5a719ff7dc72aac4ee7bdfb71f9182b032deb9f5db913e6ee32. 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/UKGCZ2200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b0ac0dfa278132f2d71f0a2106e137c4072eb58a61f96711070789f58a6a61. 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/UKGCZ2100105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8d2920a6b95514f87eeaabe0b3975bb5db71668c7bd150b7a1a96c0f8aa637. 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/UKGCZ2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c8467737e02508dcbb118991a00c5bf34e2260432ebca93a4f83934514cb16. 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/UKGCZ2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc810bf62af2cd1156006b0e113a459ffd68d8614423398f115a0eb99da9124b5. 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/UKGCZ1800035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc11e6639c797ebcc17b9caa9ca9aa0c671703c0e45b5be1498783633f8fd83. 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/UKGCZ1800036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0750cf2a0d37c00110b1c20ee3bd92335a933860845a9f3d5c20831bbf7af73f. 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/UKGCZ1600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a474f74918eb61660bd357c631f7b80ab6d4d2167c182287bb2ac2f9d0c6ca. 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/UKGCZ2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f36598def6d0dba2741db7e6187c49c8956b5836b285007c9becd0c63fbbb92. 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/UKGCZ2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2543655ad730e0dddf5186520cab522426e19bfeae8ded7a9c8983de71f72151. 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/UKGCZ2100132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2b971c4b062b9572025422962e9a87e5102bbe4518c8ecb0d591a5df711ede. 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/UKGCZ2000109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead3a668edbb2be4b481bd21d809f7ea2fb90e61960606550bf9e34c481e783e. 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/UKGCZ2000078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d137d3d143298300f25a55fae2b028f8d621c33e7b5e478b78695e40d4de12. 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/QZK6K2449699.