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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc098e26f50e8491dc97af1edcbe5b57078f8ea9ad5caf55d06faf0564b21d435. 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/70bc543c-0aaa-4819-8f7d-fc659d8f0f93.json and https://artists.proofprofile.net/proofs/artist/70bc543c-0aaa-4819-8f7d-fc659d8f0f93.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbadb5c005407d3136c8213bfd35965c74513f94f77c9f61b59729af533d64357. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:29:04Z), 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/BR71I1100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f56729b3ce3e27cf913c9e5bfe988d59bed19a537daafb07ae47501545835a. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/BR71I1100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd36c3e6b9d7d07478894d96446da3b5029b68204d3a396e323014edc9aec1b. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:50:58Z), 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/BR71I1100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c52f966dc9011bee960681e41189bcf1f5aeb637761a6c764b5e572a6119844. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:11:16Z), 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/BR71I1100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb6242feba5dbdc84383045471f2ff1b3525847b3c9e4b92995bb5d0177b5ee. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:19:02Z), 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/QZ5AB1628480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db6559d8bb31b1e4dcc5280e4bf4c0e0a3034cbfc73a4889c3e0437dc8ee92e. 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/QZ5AB1891714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d6e445dc37e70f50c72860b80509d8de21c442492ce8cf54d7d81708b60ad9. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZ5AB2020955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a323559d537815f80df3d3bac457aa869368ab0740f773296dd019e8689801. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:11:09Z), 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/QZGLM1902084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f6941b5a487208ea52615e2475ee3294967e1eb9893fc24fee18daaa8889b0. 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/QZHZ51910341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc684ae065a1c33f250cb0accd6344c53f9f5c3b1a81945dd531ed6076b3330. 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/QZHZ52039448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a594a77e18e86e6601ea18c07215d5e505eb27a5a3523de300a381f43c6df6. 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/QZW9M2298344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf10d6a2fa50bb6563b356d8ad2f3301df717b78dbe2f6ff390ffb90cf76852. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZW9M2298345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7411fb55966c6c5d032c79e63e25741cbd0e7214c0341d5f95cca8a7bb38e233. 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/QZW9M2298347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e2db84526d6a477bbbedd3b0d5b4eb158de6c96028f4856be7a389e74572a2. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:38:09Z), 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/QZNJX2369409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba213605edc46da9f70383c2bb7ce8c36c33eadc355da39482a1e2f622c068da. 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/QZTPX2362675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8b463acfab20b799ad9be8e99567c92902a6835bc5a49f31f62309acb8e8fe. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNJV2459864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f513030e8312e68b435d6201ab1917c0ce69188f0a0673517c43520777e8bdf. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZNJZ2429295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4405b38b2157dc2f704cba3b65e47dca7928a98c3c356188fe5ff7a96f7e3422. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZGLM2415600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0be34778aaedd515f2a8f625b74f566793d1bc66b748cd216e68a4eebd5f16. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNJZ2429297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe911855c9e2f36c3390dd753531a411407e3e95277c381697252fbe3b672e6ab. 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/QZNJZ2429298.