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 0xf33254f59f4d706d18aa2e026a1c5e07aa6cadf9ab178939cc9a40abd9973c59. 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/2d0a967c-2d8b-4ac1-874b-69ed6401dc46.json and https://artists.proofprofile.net/proofs/artist/2d0a967c-2d8b-4ac1-874b-69ed6401dc46.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 0xc4959f5f45949e0cf3713d02c916e116e8f9a37d5eff45c2bf16edfcd55b9c63. 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/TCADR1882442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2fd136493859a9b72463159733aff01513ee465433c2086a54f894075776c7. 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/QZZ972423450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054d84cbdebd5a1a876f9953d24f6be9fc3cb46cd75412658648b03595f60bcd. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZZ972423452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e75c8386bebc1b849fdea28e3ad9620895f9967ccbcf24fc12889410d5982f. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZZ972423453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0d88fcf398cd919a4ec9b18f3f9adf6a8f5abc35894c3e14100bf160ea6e49. 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/QZZ972423457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac78713345fe0a22eca487d6b9a8e83bd90afee9ee04584e4e419e886e8fad0. 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/QZZ972423458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723d986c33fb98ad83f42efe36952f248afaad1851bc85480474af33aa91686b. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/USHM81979167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf737b6e433410e454c7f6816983f98982a2fec6fdc5f374045eafc565d928c42. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/USHM81979168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e57cd168722e13db8bf0c674fc782027f8f798e0e00a45431a178bcc66d581. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/USHM81979170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880835b9638ac9e9ed902f848c1eaf14b339fb9ab8f426e771e06ccd6da88c9e. 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/USHM81979172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d6f2a0e643735022586509581bd791e33096dd571c28c2fbd54d53c54fef36. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/USHM81979175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237a6750548e9d43e920147a4f39c46e1e3bd3f3eb4aeac4fb857b4c3dacdfc3. 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/USHM81979176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c05e26d3b9e2fc85ebb273053d64cb40277b74971c23a8dffa34b34c6e80d1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHM81979178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2ba67f9636896739543d11180e2c423444b51add4f60b99d6e0fa22f320a06. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USL4Q1991780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15684080fae0faa94f135a6bef0aaba2f49ab78790e4db8b894762f6b1decbf7. 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/USL4Q2194026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d09b5c59f743b66dc1d23fb9c712f946a1ea2d28587073d63c63cda5738b0eb. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USL4Q2194028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc251f47b62cf7a3adb691a906ff559cbd5a3e8cc29ce4ac9cbb2b21d26c0af63. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/USL4Q2194029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1348912341148aef9bb427256145966e1b35e52c53c630003ef64efc641c184. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USL4Q2194030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681cb4955b7be9e02f98eb595da67fc5d11d521ad675f68a7e24f5b99e4789ec. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/USL4Q2194031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a87c152424ce2673240df38d5735dc6bfa1347f3eee162ee940738167fb639. 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/USHM92274163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8caa6fcdf9c4bd9bb968f23aa1ca274d236b3e46556ab401b435240afce0bd12. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/USHM92274165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ac0332dc5a03a856537cee9de45d2029def659cdcd4beb8a0b3cf2273efdb7. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/USHM92274166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae2f28b634ff584ab96b265e298a9b7394e428a8a00ebc64b93d4a5f6c1981b. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T00:53:33Z), 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/USHM92274167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735d31575e069b0cc1c058790949630f48e16bc8e35b72e3ff67e64af4240c63. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/USHM92274170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70007ea37227cec3a30d8c92acace5bc81f0a271b601a3e2c0455cb6c07abfa. 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/USMH92326199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904f868543b07ab70bf9d36a67aa8cf7bbf262178859a8985ae76980d161ac23. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/USL4R2383618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d43d25e4baae3983740ca0a7c6f3d7d8cbe95b71b8a2d884c71b9261de1b8e3. 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/USL4R2383619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa729c820c25535aa706a379759ee8772b0f63131d2185f94922c780868967d68. 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/USL4R2383620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70e0101a59e95f369786f3d5a047bc1091ec3c8d0bf2c8fa808875de1cfb5fe. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USL4R2383621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784f6d4e80f485ec88e1291f85869c1e208d5156afa0b6980fa36b2493a9d7a1. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/USL4R2383623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128809b20e58cb09cd682de744a2c7b31aa42fe6bd380796881a559e851c5cd1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USL4R2383624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c91cb5793bb80a0531181b3f8ef242e4d7ca792204d717f7d563cdce48c819. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USL4R2383626.