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 0xe714d336d83532d22c5ab0e3495ae20c51b20160221aa622c1a13ef726c8aaa8. 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/53cddd92-acdf-449d-af58-6ce0b481328b.json and https://artists.proofprofile.net/proofs/artist/53cddd92-acdf-449d-af58-6ce0b481328b.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 0x75c0dbbd3281692abda198f31d76fe8e19c48c08c854bcc38ec02e425aeb1b42. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/BX4IU2308858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09902194227e262a7c326446f91dceace8206664cf5bb160efa6d490c0a90a0. 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/BX4IU2360629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e33862c9c63848b16f6b010c53e92aee6ee36f8cbeaebb2c426e56a4c385e6. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/GXF9Q2534996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917902686f61537e57409d01a16e9667231f5285196d4f64773000bcc3ce004a. 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/GXF9Q2534997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46944b912f695c14b5661fe4edab2cf41c6d8e40969e9b31087122eb9c3262c. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GXF9Q2534998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1f9ffe03a802b76e78e45ec2c96803e9add7db29c500f43557c5329839e331. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/GXF9Q2563011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e33309d42a7b8f6fda352c64b7db90815d45bc1dbece9cb88b25b9df90e3673. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GXF9Q2598403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5913066511c3c8825e57f5931bb66ad397048936433052f4d90c26b8b6222e84. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/UKXN22548929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc124d2cbfca083097786168c845e2c3c7e6671ec112b2e3465ea23d4aee1ff83. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/UKXN22548931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5e123ebf5951df7ecf812fc1225f6c7c693d35b6287b3ad59527a2259651e5. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/UKXN22548932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5cae9eec20f251366d1a71eb4c2607bd98e7fe35d7501b2a6bbeaa65911c955. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/BCM9B2500100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9fef85fa9a76299288d8349c36f88edd3586c114adbf6bb1f5ab7816868c6e6. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/BCM9B2500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda017cceb5000665449a9520acf34b2a4b6b66b61bd0a870fcfd50274f0d9a9. 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/BCM9B2500103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cb2e59e18298fcafe8ba0c31daaeed7f0f98cf8b3d7fa31d5528cc7d2df555. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/BXJ9E2500106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d8966b5e06f62a7ffd584a22b98ab4853ee46f685ab27dd1abf7ffb08169b0. 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/BCM9B2500936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41092e07b396c457b1bc479858695d22c3c96c40c32b4cfeb2937884176fdc7e. 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/BCM9B2400944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9fd78d4b3fe6605f91c0ae2332c7f121acd8a4a2bc9c238d78b15ffa2ae35c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BCM9B2400092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1015add2a1a9aaf04296e797ef9ad7eb6e77ba803cb379d12558ca8f071bc93. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BX4IU2358473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20f7eb8d550d03ed7063a234a36568f4cc6ca9c334a1a0fef54922b7df497e5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BX4IU2322921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0af7312c41f179db51a04148729304a66e4f351e27502171d90881fbf7759cb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BCM9B2401291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44df14c2ec71fa6ebffe9dd9fe4df472f5e7b4239e4bfc4d2f41878e2d7c6232. 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/BCM9B2401288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247aa16265fd34fb250e3d494947e7ee3e9aa23779a444fafad2372d18f684d0. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/BCM9B2500644.