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 0x23eda4dae48104efce33ba9852be1bfbedfaceb146c416788aa7c9ae006981cf. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad9c0bf8-aa19-4006-b9a1-a43da7c68395.json and https://artists.proofprofile.net/proofs/artist/ad9c0bf8-aa19-4006-b9a1-a43da7c68395.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 0x1b0ca644230c7c18b77868eb3e714f5aa4f8ce930a788021eeb8e156e54a9812. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHZ62060181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdcc529ff2bfbbf65df26fade5ad8260702ac99efaa3538e9c10ac37f567cc2. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZHZ62054588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e29a01aa1fd8ae0a3242f1959a4e10e0ecdf6b1ec1f6ee6445877b8cd2a933. 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/QZHZ62054591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd3a048ab6246f729d716d71fb72c1a14331c3af33de7b80d02f6822690fe7c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHZ62054594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed47a00f40a1d78736e35b2348e4f77299bfd2f22701051ec38ed9a36a9391de. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZHZ62054595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80ce174484b87809077e7c98f28511158dc42f66ee5e4ab36ca2daf3208c0aa. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZHZ62054603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780acdfba2506797cd824741b4cdae5e3a538742f8e87f297a1199a6418faf74. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:41:35Z), 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/QZNJX2159363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27fa4e9d5b165d75d71aa048073d49280eb06597a8c8fc948db14550417e5145. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZNJX2159367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1c8630a0ad740f844a39a3906e8dbcbab4e78240ff42aeae54c4524621747a. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/QZNJX2159371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b9d329b3d4266a4b236749a3435a41ae64fb706dac2bc028d49540892d4d6e. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZNJX2178611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5078ee579e183afc1ae2c412f0db88a99b0ba232cb64d0a771a9f6f8cec84fb5. 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/QZNJX2178613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7f373539f9b172b8b8b507cbce0b5471e33a772fdc7c3fde2cc85c20bd4304. 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/QZNJX2178631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5091981c1f8385eb639d724443aa9e752cf702eec5ee50c506ed7346916277c4. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZNJX2178635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9dbe1d30b2d9cce0397ae5a501769c53331df8710abe7ddb1afc065e085f51. 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/QZNJW2476236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2859bc05a09d636806abb4a7b3b859da8e138d3b970cf1e622ad8de985d484ca. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:27:27Z), 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/QZNJX2500627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a47a658f38b4a97ef9f0bf59bff570a8aae0b6d98e2f3200564531a88e33456. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZNJY2532892.