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 0x5fe06a089cabae5fcf5846f70ecfed4c1bbf468046ad4c510cc0826328b88019. 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/30fd58fd-6019-464a-8c3e-0cee398c99b3.json and https://artists.proofprofile.net/proofs/artist/30fd58fd-6019-464a-8c3e-0cee398c99b3.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 0x7e3b00f17a81738f55784a9d5cceb5631d82af3dc503c7586426e031f39b45ec. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZHN32298457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46bd108cb98a69028ff60d5f29d21f18f2f41363fc5b5f81546d399122000e40. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZHN52247396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60e3a13a7b3f4ea3fdf8958c1098d84359ff012dadb74a840aab554013ec505. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZMEP2276826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0350b4c28550b51da326e7062cde5f08b57421e8fe7223bf9d959bbce61b58. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZMEP2281305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b18d42782a88f3ec9740728605a4d364416cd96d7b712cd196d8a25339861f. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZNWQ2284767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd882e0f4c35ce1fcf428bd28a3c207af2b90948bcab92bbf7f4aa94908535616. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZNWY2261418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a035e388b85321e1b19d9062f9d6b7086605630792f9ec501ba3ef6bfc4c23f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZMEQ2321275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cab4fe07c1ce0915d59843b4c5572f3a1f44d8020d2a6e001d76870cde1bfa. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZMEQ2376060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd882e0f4c35ce1fcf428bd28a3c207af2b90948bcab92bbf7f4aa94908535616. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZNWY2261418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0350b4c28550b51da326e7062cde5f08b57421e8fe7223bf9d959bbce61b58. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZMEP2281305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b18d42782a88f3ec9740728605a4d364416cd96d7b712cd196d8a25339861f. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZNWQ2284767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a035e388b85321e1b19d9062f9d6b7086605630792f9ec501ba3ef6bfc4c23f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZMEQ2321275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3b00f17a81738f55784a9d5cceb5631d82af3dc503c7586426e031f39b45ec. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/QZHN32298457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa3556179ccdb9aa81f95df1167c7f92ab64be0f631b8034ce6e54c55638f8d. 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/QZFZ62200216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cab4fe07c1ce0915d59843b4c5572f3a1f44d8020d2a6e001d76870cde1bfa. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZMEQ2376060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda708bb8a52f96fe40afe6d2fdd6fa176064e719b5f2616eae485ac679b6a643. 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/QZMER2324458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60e3a13a7b3f4ea3fdf8958c1098d84359ff012dadb74a840aab554013ec505. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZMEP2276826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46bd108cb98a69028ff60d5f29d21f18f2f41363fc5b5f81546d399122000e40. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZHN52247396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b21fd828cbf2c8ad8e082a5f9d22dd03648270b37de876fd3186c6843f1821. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZFZ42257695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda708bb8a52f96fe40afe6d2fdd6fa176064e719b5f2616eae485ac679b6a643. 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/QZMER2324458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038f1c34ca5f55d8e00dab9e35ef0dcb9ba0b813a5f7b688166a13eea03b404c. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QZWFW2464859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c21484de871eab89695565d9977d711cfd601ac3e5dbc97fa57131c48534c4. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZWFW2464860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539b9379a2fe36c8e6ae9e353d0dd4a3f26306a3761b7cbfc473492178749af7. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZWFW2464863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0cfc78f4858f7f11e33377162c47a3c6bb92a1b07bfb993a66298eb09fdef24. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWFK2451068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5f27ebd70411b2d27f68a0d058177f52f713406bb49320b90933ebaf0805f1. 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/QZHN82538217.