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 0xbcbe27227a89de34172e2b43af95dc2faea3c21381f8ffe8d1c699dc22184e4d. 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/ac304849-9cdc-486a-854f-6b180f5dbd59.json and https://artists.proofprofile.net/proofs/artist/ac304849-9cdc-486a-854f-6b180f5dbd59.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 0x37b1fe6953b01e52adba0ffa2207b9a2badf171f43f0f1254589bd7afeb9be65. 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/SMRUS0075261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce0902284c2b5dea38735d1085d29ffe453076321c654bfe11e98a2815d3d9a. 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/SMRUS0072261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab098f6320ea8461033913eea5045ec77e5807a6cb82e5c95ecc808afab9462. 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/SMRUS0072262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a173d7179716a96fff9429fa2dd20f65b675e9abae1f7f112803bf53fbc461. 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/SMRUS0072263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c9b3538bd3e3d79a37268e5db86b888a42231339687095debdf57b46c00d4b. 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/SMRUS0072264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a298f87b12c7f7279eef29b42ea81b88d571c4af48bb6b4f725e6afc2762b0a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SMRUS0072265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a761ff0f110903ef373b5dc820cacd562dab079cc70ed2ad29dbc9a9549a4cf. 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/SMRUS0072266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c64ad0f4207f4f7ecdae178b0eefaec1b497b42db9353d2cf408351961cbff7. 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/SMRUS0072267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bbfd3290d2047db51baa8f2990e648171486050462c6438d7ce9ae553491855. 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/SMRUS0072268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0412260021872dacbc467cd74af393d04974e56390829384a7e3d2ade77be8ac. 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/SMRUS0072269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c88fef86f7db231732a4e16dbeae2ef6f91bf9d76ac0347c2661796de461b6. 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/SMRUS0072271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3622c05fdda8cd0c12eef58e8e448e15cddc843df680424d98b5e06e21e931a. 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/DGA062402460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c947b6ce1b8b1364cd585b12ccca46d067803338622c43e057455f629b6aba4. 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/FRX452482552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a48baa5012452f2d691ae594c3951cca987cce94a71a4400d0bc77a0969b86. 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/FRX202414750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbe7f1a73e3cc4d33ded7c59167e008e719f613fb06573287a3a94581f11fd7. 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/FR59R2455171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6c9c99a479822a0a5250ea25024a995073a1ad7f25623ee11b975541665754. 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/FR2X42422665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e0b5294658d6e6c2b8b0718e8ae1e8432ec92572c898114e484afcbade5240. 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/DGA0R2323852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9490d0174489dd6fe15153a6fe26afa0a755b4a8af01dd38f201307e02ff95. 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/DGA0P2375143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3a48a977dc436dd8aa4232dc686a4ff75ef32e0d86bf7f619af560e42be01b. 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/DGA092376087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba69a0d8e20c85a79613ebdf445651555fc084acbbbc20e32484b52d6cacad0c. 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/DGA062366402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60438c4b9031d7eac0a08cf03bff59bd9fa43fdbb3dce913e8e60d3d7bffe42a. 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/FRX762363451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ea7ff41efa6117404881d2ea24252395453d11e771bf054a747eeaf69ff09d. 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/FRX282319343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6facd0ab1c36c5fd65472ffa45b2668add89f568f87e786fce8f657e0bedbd0. 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/FR2X42338511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6513e77386f95d7c072fd5897df0d2fee9cfda647d5b7e42185775c1c8f01b5. 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/FR2X42338512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353b6f7bb0830e89f3c6493931c1e68a29fd293c261e0a2da10568749d91a6c3. 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/FR2X42338513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab03bd65720464531fa54b904f30180d37a670076c664667cfb336b8771a67c1. 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/FR2X42338514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ba9b8094bba1cb3385d451cb938943a7b6748764fbadbeceb2b01a64fba2b6. 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/DGA052264020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8e08044494513ab41374d4627e52c71ad182443aec114a78e00c063ac1e345. 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/FR2X42250126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c99e35509053f1ad120a4f2b301c1a9e93e1866dabd2608ad83e9c4763c85e. 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/FR10S2271453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcd1228dcabffa750ec2fece9e1c36f84e000b5946d0e3abade5e7f0271720b. 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/QMFMF2129625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32fc7d4874bf10fd2808fe926aade1e515b3bb8292b47029c8b6149c70e679f7. 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/SMRUS0074022.