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 0xd34364ec6c3d4c73afb69be3f71069be397156a8b3999a6e7b86640be8fa77b9. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/298c0e19-bff1-4720-8f07-06a3fa45760e.json and https://artists.proofprofile.net/proofs/artist/298c0e19-bff1-4720-8f07-06a3fa45760e.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 0x3ec85d7e117479108c4e45582c4e808d34a8f28abb46e071dd56e623247e9d75. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GXF9Q2432024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde615b555ba9005fd98c7c56adcad3ef6a741fabc8d28ac23109ca79e18eccf5. 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/QZTAU2430603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8adf2e73e1cdc369c449a0a789d198484b5da84688a89a97637f9f777aa9914e. 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/QZTAU2434584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef4900e886da8f56a528f02104c51e4b2e4970275f06fc792886a1d3fe95156. 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/QZK6F2478740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd3022550215135af79cb3382e7f47b4b02a59e6a55318db9f51b31bc25bf09. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZK6F2478741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe823fe93edf02d628cdf0a72142014eb23259323f99e16b4c56458250e65f58e. 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/QZK6F2478743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769ad0102143d9abb9d8a8066bc32eac2d0c99550b86889b8c55d4d425fca7dc. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZK6F2478744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3757aa2fe033ae34f0e0c56a61961298a428f15e862d58b3f80fdb2b45bfbe. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/GXF9Q2481251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3c8280f214b3727d0bfa5c9a08584b7703b2c151948331e8a22e9df41d5239. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/GXF9Q2481252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe486504390a9afc2c828083d8fc5ff4b32382a7e7f55fdf368cc910a6eec2ad3. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GXF9Q2481257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc3f782febcee9cd887b18fbc997cf5ed81a103db2bcbabfe1f94464bdf8f67. 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/GXF9Q2481261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1a9474e1eaca107ffe6d8e27b49e53fe0764e42c6e0c19fb58f6df81c4e13a. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZK6H2457777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2fad6fa875baf4982859239899f3eb2e819b56f1c90b799e3c52382c50bd00. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/UKXN22505521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb702dd36ba01b059d0b6126efa48df90548712f3f8531906785478c9f06262fc. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GBMA22550446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea21b1ba15c9b082a1aac82dcec3560f3649da2e548bc9bea433c314aa36b1fc. 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/GXHAF2505751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0986dc4f7a513387515a4a3074631f959daa0abdf0461813db03fcf623faf829. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GXHAF2505772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5580235df4f38aee91d4c19bfd5b9ed5bae618b664b4f2bac237321c080f8d3e. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GXHUT2552371.