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 0xedfa23b9e061b03b3eaf7ccdef316013b1c98381eec7b6fc717d5367322698b7. 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/f030fbac-2efa-4c12-a08c-1bb9058fe105.json and https://artists.proofprofile.net/proofs/artist/f030fbac-2efa-4c12-a08c-1bb9058fe105.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 0x032d714a219502f993116fe66234e90249722b8cc72945c16e4788f4d093f0ae. 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/FR26V2070945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb544e388ed320ac2864f0a10c1447a6a2479af42bbf7656de4e2d26cb2e50990. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/FR59R2188580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a424f8ee11517ca54ed4391573e642c552cc3a4e67bb5a12bdb22f657f30a66. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/FRX202253578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77f14df4594cda7d124cd738d90aa9847c2b6990fd68fff49173ca2f714bd9e. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/FRX762134585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6702bb4601520433974fe8ac2af1a6aefc9700d8b49bbf953a4f9fad3e6d1518. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/FRX762166242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52b31c08e58d4db835d0ed2cfb036058f594e487012c754dda15b66f62c2dff. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FRX762188536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f971bea5acf0b52d8e8dda226df0e334a01f88ce2eef8b3938173ce502fc69. 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/QZN882167010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dedfe0df8dca1a65be1024315cb38fdd2445332a768ec7e54d7fe6ec524ff9d. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZN882167014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f418b0785d1d0216e4cd3fab61185c0643c0c0ac35acf11f9d46e879f26ebe9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZN882167015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d15cb8030ddd6c88cf9d198bb8cd14f60aeb328a8180457d85880fc25d2fba. 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/QZN882167016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615da8e1f6577d20a22bb5544a805dac7213fec52c1b89e217deb73a9ed0febd. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZN882167021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6c18ec271dd94b181a0709c19c325bd524e2691a21f32360b8f076cf318593. 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/FR2X42259286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1017a295f0605161758b671d45bbf9b96cd3e6d5c37b54394f5e73c3b96050. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/FRX872336678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41703c0b5b3b982af66ad6b466792ab714a6d034e30783ef5b98a7acbb63f2a. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/DGA052340687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa19c494195dac1aeeb6188aa1a5131f565d20f7757ca0ea62018d480190dac. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/IDC302111523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e23b662bdf495382ea36488b0a815e9c431d639e626a9f4330529fde1625206. Chain 2 (Bitcoin): anchored in block 957730 (2026-07-12T16:41:26Z), 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/IDC302111660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd491d600fc68fee98ae4143c07b86ac9db8e1dfd6814144fe676ce4fd09802f7. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/IDC302111531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c06c6b71f8623a960a475b9de4eed43186a94989ed06fcfc3a39a687496e18. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DGA092323797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420b35d5fd8c01ce5cedfffd4144a4c2dfbf82f5187698fec6a7c09f1c258736. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/DGA092323796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6cc9ca473808a29cf46c6bce33452a68d504dc0d1ecbb0aacb17f25a5d6bb30. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/MYLR12230058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59fa1a76c840b07ce704188645f2103ac4881c5e66a6c8c3fe69dd6b64cf63ee. 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/IDA182335200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026e0c055a1c9faa4098c41f6d0ff32376626d8d4e910e3d9db2234959fa712e. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/IDA182335199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7892be1d63f9fc6a473e87821504def620f9089eacab73cdb6ea500ee992676. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/IDA182335503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d381d80ce6e1021ecddcf74b20145eb310b953fb16bd8aa225ed2f19bff3b3. 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/FR10S2459051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d5e6cc3d309c9b9469c68dc97faebea145de8b8eaf05e64ba0f3becdfe4b18. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR10S2459057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3dc46c517646b631dbed35065ac39edd4a26e8106438cac8fdfe8642dad2486. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/FR10S2459050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a784587096ddb2bab0568961495857d9c9288faf22452573f22b3e434a47ad. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/FRX202542960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ea6d0d1c670a49cc45771212a25ff4310e76404579ac73d530bfd4c4eda136. 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/FRX282594165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03b02f0a0f458042c3a9b0a2de534466f40a303211fe7882bc15d3ed9a5e790. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/MYLR12530009.