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 0x9d8ca190d6d5bb160115722aba0f1fb07a3fab0d5c2d034933224ae54b73cccf. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28e4b971-cc37-44b7-9db8-06951998c64a.json and https://artists.proofprofile.net/proofs/artist/28e4b971-cc37-44b7-9db8-06951998c64a.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 0x3e273507675f0366011a6a077d15d4522ba6d136b9fd57a97172e9874130fe00. 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/SE6XK8200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe895e79d4884d69967c5b82c42c7cd5039e226441d2babb1dceaef582ca9a558. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/SE6XK8200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45712421bae5c3f3a19a9b2ef3c31a4e1ea1f05c9177adb8e6774aa20899ecfc. 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/SE6XK8200106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf907a8b4017e75b48d83b94649f6013bfa8fe13a9f045ec3c445dd807f120bda. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SE6XK8200107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3952b4280bc015060b8944a1a0b006e979fd8c6ba284afc4ad083c2b9fc5e47. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/SE6XK8200108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba06aa66144b9c0e0ff2d1439dbaff4e80a88d66db0ecb168a5da3308b98077. 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/SE6XK8200109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7ddc02cf88ae97bdfd8c05581d7ebc8dce6f4bf5afaa45c1acfe3763e34861. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/SE6XK8200111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6318082034acfde8e3e17b8c6a9607a2dc16f11025234f11d87d3cf830006e0a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SE6XK8300102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ea22cee3043098ba67ddc30ebad2dc819a7c052915c515e715e37e4e8b1e96. 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/SE6XK8300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb3d1df088e836e8d1c05be7c2e3e0fd861194d46cce8746dc4e498ab48d69e. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/SE6XK8300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c628202c3510631326393d13b8c4d2ceedfb4acb4eefdd6325cf7fbf7093f9f. 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/SE6XK8300105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa64227881b2bb2b55a10ea4e78da7bfca93226a022405a2c089d2d443e73a1. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SE6XK8300106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36b55f51c890289bd2a7b8039227828cd4990ce1d4ae710f006ab40fcfb7476. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:28:11Z), 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/SE6XK8300107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70750a3cc45ebb613e47d3ce166edf6040b1d230e7a22e93261f4f9a5ee78d36. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T16:02:02Z), 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/SE6XK1800109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6390115ca8acc836c4476184c53886af499fb6f6a12efc8f7e70879e91ebb4d9. 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/SE6XK2100101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec1db4c9f72f8bc4793f5b5caa8051f52853a141c0a6c7d2bc86f7c6577d48f. 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/SE6XK2200102.