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 0xb037fd3bb6ec83548d5189300cb36dfc263e5bc98b57b53f29be255c33f48839. 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/2c92ae41-7afa-4430-8528-e07c35bcf13b.json and https://artists.proofprofile.net/proofs/artist/2c92ae41-7afa-4430-8528-e07c35bcf13b.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 0x5c694b8c5a7e1770755aa0831f66e6a78bfab93103b11e9c209cd3766fe008ba. 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/QM3DF2197796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57496ee1f112575c868456035e83bdca7a94856c6ee70bc1b8f2ff10598bc6f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:47:33Z), 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/QZN882253630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4cc8dd5da944e8042edf9a1ee0ce031f8120d0b4ce95f06a0ba35b782e996b. 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/ZZOPM2238179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe566e73045764d000afb4423a741207f3c38c17b7603294dcae127415a0889a1. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/USANG2202051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c89d4a7cd0783ee2661fc6a15e334dd82f3ca4bc8d4990548e3e1d529d513c2. 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/USANG2209082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b87db58bf3a846bb90146c538a6ebac4897d42baa379215c724c38b46e03c6. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/USANG2209083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2ee70c881bda91791b9da7b74993c36f7cc724d7f6961304d10e5aa96e2fa3. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/USANG2209096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb48718ee5d28016aa80f5f143334383740947119c280178cb41729616a3d4c. 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/USANG2238231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630363925cdd05b7c65330f678aad65267d3a3be428dd52638947a36529c0dfe. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:35:45Z), 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/USANG2237396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271087a176cd6f49689809cf5b6f3cc9fc0c45c4d3e1f914756dd84cb48d5f79. 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/USANG2285646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268c2463b45f438193d55e102d340708eda832c68662f8854e0369c2001e5a21. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:54:23Z), 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/QM3DF2213205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b9914eebeb7d0fda66ef9ec783ad0f545dd55c6ab02f091f8168801da4625f. 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/USANG2439983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e99ff8cfd705a6eaf4f2b3b6ed45489551bd4e2c16f4cf8fcee0ae0b108e06. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/USANG2439981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11d06872e134fbae27d0d09de66666221ec7b26ffd459476afd3ca2139e284c. 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/USANG2439986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254dbae484bfa5376ac072ea4de0fcafe44a1f21d576564751839ba846ce199b. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:08:45Z), 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/QZVEM2599619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a3ddc45dc2a94b6077278f7a3ac7e3b332e21bf71b96d6a25424c5447ddd45. 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/US3DF2412754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84962721e58c65ae974b130ec22e5f0b181e9eba27aa700459a578a5d3fd605. 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/USANG2222321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10102514f83db96dce6cad96524d801b6d468df06f25959c0aa70ea3803c0d95. 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/QM3DF2277846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906dc3c35e7bec56b917e96bd57bcef3f8b9703327e4659a357e59c029fad89e. 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/US3DF2480834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff2988f740ca9945def83152feb7d8bdc757a1b945011236506a68abf92ed5b. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/UKZGC2300448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bf86bd2dd6fbd0dc07380a8f1efd42546336446c4397982996ec45bdd984ef. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/US3DF2244944.