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 0x60ad07c95cf5b9b1124c4b962201c165c8151fefe2bb80d99f9f71cd09f2a477. 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/bd317dbf-527c-4cfc-b9f8-8dce4f2f4dba.json and https://artists.proofprofile.net/proofs/artist/bd317dbf-527c-4cfc-b9f8-8dce4f2f4dba.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 0x0acd9e4e762ecf61ef3449644deb76808bfb006c61541c209e56104ba370c7d0. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR10S1768168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3546e0923d4102c2aab76c3375cd96bd97ba93cdaf51643c8ae7b4ad4188348. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FR10S1768171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c1d34f63651ef10a2c0b6d47a16ed2739d65e0d0f0946acb0ba72e30f24896. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:03:37Z), 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/DGA072198895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31086a008ab38ad996281d295b3f8df2824593704bd98504a9f4dd3da94292de. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/DGA072198960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc753dce3f9b4662b4aa56491ba07ca750829f4cab6dde276dc56d0d60140d13. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/DGA072143807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe263be949d97c475bdb984d3fdb3feb03aef516d46f6ef01ffdfec19a3ebb516. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/FR2X42192448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66792947b6893425aa90e39af6c56ba7d84f0ad08f703091d0c6c65e3095855d. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/FR59R2158206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14913ddd0658682aa4bf1de777ea42354281928ef8147e36fd29be7aa950b408. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/FRX282249149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487dd90ddcea7c544f1bd1f16208b7fb683b8061dae0574981ea94f199c3b553. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/DGA082213274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea917c947c0ff755987e1fcd2f4db799ea537886ee66b98f38b5533b506f9fa. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/FRX872364612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57410b1148b6c8178cbc1c30fbe04351ec3640f20d7ef1a25d0d2ce715f2c817. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZNJZ2397575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3ce93663a773c345b22230a57ff81c7d8d8d584e4260f76a36c13ad6a6aec3. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAIN2433365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4cce84a13437a7f0bf427c4a336f98a85f60c9e4d721fb14cf1d3fcfab85a1. 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/QZGLM2558837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd596a24c51bedf59d40a7884311a7bd5d6292ba0114f31988e124288ded92b5f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:43:42Z), 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/QZMZ92524298.