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 0x137f9b736ae31f9fac88959cd18b27101a2542b7002c31355d179796008a434b. 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/d15cedd4-c6b4-4732-afa1-809f4d09dc7b.json and https://artists.proofprofile.net/proofs/artist/d15cedd4-c6b4-4732-afa1-809f4d09dc7b.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 0x88a58e704f7f9f40a107dc13d027cc9552589ed6ffd0122915f4c42301b58963. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CLBB29500221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28feab1f9c0977cb9356a6be4253bfbe16bd6fcd4aec6dd764c99a49e2b1be69. 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/CLBB29500222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f09931d72d5ce6932612934fba8daece934159e10510961aebda177f7813fe. 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/CLBB29500223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ce0d3e421c1df8ad6aed587d8d06fd746bffd0888d418bb46f756ef656909b. 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/CLBB29500224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4cc16fb7cd3874ddcdc84a5ba6e2c2cb614f81daaf5b3543ae85dea64b4b4c. 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/CLBB29500225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c840a13d646a0607b00874e94d2b519eeae77f15bf051d2c0d65c4a384a3740. 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/CLBB29500231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b939a89ea6d432ed2fa00ef50f20d323a51d0a5577eae1b93a984da2045dbc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CLBB29500232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7e1c07932ef58a9203a7364a7f4f2c856d183edf717a9e06453ce85b7a42b2. 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/CLBB29500233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2004c48e99955888d1d024bb7dc666e0f1153f7036424f8e113100fdc0f13939. 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/CLBB29500234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8a85d8c59bc018d8f85e1cd552ce5eabf6a9e28a98a113af0b5ee0aa34501b. 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/CLBB29500235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e79670aa83d0d68dd26a2f086e0ec4f792ab29b5b2cb08a0f2727d7ebc890a0. 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/CLBB29500236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2239209b1ba927302a216a017214936685120cfc9eab687e468fa89bb768d010. 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/CLBB29500237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbb9d6d5e27031a59e449894bf82256c85e8ac875e41eb68796aaa2604be966. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CLBB29500238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818903425222fe5bb1f8cdedf99b6c9b9576a39cb022626fc4a2da89d9c65eb6. 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/CLBB29500226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0c13d66bd9ba4062626135cbf5a5cc99bc051dbc2c6b4e085624b93e594dd1. 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/CLBB29500227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf901c17db3a57c7c43d90f09f6174af4f568b80a6623b89ec36e750cb0aa2379. 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/CLBB29500228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e87921bebd5924df15ae6e130e87569da6d663c0af8d3672abc4ab57abd846a. 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/FR5S91000827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe345936623f56e561f83b5286484a08927f7629c62e40307ab9e93677c7ab7cb. 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/FR5S91000829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24127bcefca54669e84fc2bb69a25f6783c8b145daf394bc1650785132abf6b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR5S90400052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c1cec8c231bdf701b55b6773e6c683998bd436ebd46da7462a39d1a4d1796b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR5S90400053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd103515b292617c21a953e0a0dd177c5e1e495cdd91068288433c43a369f826. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/FR5S90400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43263de1de71638995b7cc6054f9f0fd179098e7388e6cb85e431adfdb3ef66a. 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/FR5S90400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b56b1e6317ec66f9435f537f21bc7aa6305ea55d5258010c43707424399a1f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR5S90400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea852d5e7c357f7fdc6a0e4d9489ec0acc5bb400c18ce3f337526f4eb4c2dc69. 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/FR5S90400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3420143a44f3af8d650635609122747d5031ed1d32a598a54547461eae74192. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CLKT22002289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603e92904dfcc051b79832951deb5657a53a401d0d30861d3432ffb6c3906926. 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/CLKT22002292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a67bd189907c999fe8401d703a935ce8088892798e1dffc2a0ad81b3b19c62. 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/CLKT22002293.