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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11908b9d65ae4344a7c14584cafecc111e4f510e15f9beb95b5d61df9f9217de. 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/c6581f4a-c58e-4b59-89df-84cb45dbc721.json and https://artists.proofprofile.net/proofs/artist/c6581f4a-c58e-4b59-89df-84cb45dbc721.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e0902a9ffd5cd093858da9e5425b1897530c494c40f0e90ff53eb7d4476dc7. 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/GB8KE2053855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf081d31a00d886eead7726fb0993455553c8da5f8b6afc3f889e7dd33b1a87. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/GB8KE2055734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55415f19f5686c2afff8f28161a86b96c1ac148fab298c9e140a83911d19d74. 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/GB8KE2058249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111b3de8e5ee37340a39b6fa2990a0c3e1d90a7b7d580cc3f33036647cf3bf53. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GB8KE2161717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58210f09986f62c7ba4ae5640cbe0ff440a6de88b9948764a60814bad6acc5d3. 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/GB8KE2202433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b120dd9b34097084f0b2a14fb92d2da9d54b6bed473c55de34c6c5a5e345bbd. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GB8KE2205355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55200a51bf73cf941909eb4dc506eb8b467aada78eadd4aab238dd88958b2f5d. 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/GB8KE2311645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885172e8f949c4cd1a783e7430746f9373bacab35d8ed56bba2545a49daf7a52. 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/GB8KE2317435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf04a391d3bb59990d391b95bbefaa708fb8fbe56832f3b5641dd61f1b46b2f. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/GB8KE2328745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5221397c9858207a7b576beefa2016e2d2dae4dd565a419429483458d6a2355f. 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/GB8KE2401236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1103aaedfbbd1b96c1efe10b73f9dc629672daaf43bb31d02626541e5b5239e. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/GB8KE2401106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb9e20fad0ecef5b064ffcbfcb3372c034e8f069dd2475634d0e9e0ec043981. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/GB8KE2406966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae564fadbd03815605572f8d1a89635711d33641ef59558843639cc20c4410f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB8KE2413282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89612ee76dbd884b2482d680cb5546bc71217cdf2bbf975fbced4c6285843ebf. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GB8KE2413289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4693d3fadc7601c7d615416c5991a52d36ad648ca51e897618f9e34b911e13e3. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/GB8KE2418324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde13a9f72a99b7fadb6abdab2ac9f7cbe84626fd32c597d1eef959070e36bdf. 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/GB8KE2418328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f609502f920f9de1e0325fb126cbf09f9ff4788207ef921d893c342f56c10f3. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/GB8KE2422996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd55574d79d76ade1e8058c6b2d509135ef6611c99fa547bf25903ed98c0e947. 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/GB8KE2423434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47209cfd5de861665472dc133aa160523d992135841e295b7f95cb5e441b08fb. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/GB8KE2428473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe271c883d3a740c7dbdaa1b0e1bdcc32efe687a46e82296dca5d7139ab4a17. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/GB8KE2500457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34d2b9c54f96011e9ec6da4d0eeba089ac3c6c7ace60dafd97b7bab5788e01f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GB8KE2502084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9063cfbad73e199a59e2c03922e885060fe3c607588c88ab93acc5de083a6ee5. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/GB8KE2503126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167a6c633bb80b6a5770a7e9e048ed5d3ca3e3353dc9878c3da10a5ef94dbe61. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/GB8KE2503801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc529d36795d39c8da10a5c9be3962c98d7331593766c60146642f297fecb1b5. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/GB8KE2504539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c57a220d0807c58365455da053a742158788953d833b72451f8795fa095b0a9. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/GB8KE2504486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170c878612c1a5e98bc9cfc269597204df19b143fda8ab2e5b869953f34765f8. Chain 2 (Bitcoin): anchored in block 958752 (2026-07-19T16:00:28Z), 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/GB8KE2504552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef20dc7ceff918a5e3218c3f7cee2600000ffe778b762d4461b352dd97f444f8. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/GB8KE2504553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b438a9be3fa2311e3de521632bbe2e55e34751f9b03f0e09790b7923abd4ea9. 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/GB8KE2507033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6204967bf442ae733d97794f65352dc18ab788773b67f00b975fb04dfee3b4c. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/GB8KE2509269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d25a5e2e4eced6d7c7810d5fbc4794a8ab4b15df5da157b74993eedb535c43. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GB8KE2514248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102784c040801a535d537e89c673dc75e73ce353d2590f81b842d9735b2ac15f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GB8KE2517912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fb0575cb82a264bb07b8f13aecae6036b89d3f830684233fd5a53ea9f1c1f0. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/GB8KE2518709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fda18a5ecd77f5de42c99aae4a28fe84747b3924830d033509c48eac627f91. 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/GB8KE2520543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3dccf4169c8837210e572bfe20510d744b0b9d7a35e3c4d6775e2566a49a1a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GB8KE2521764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9c632dc48161725fe8c300ff0834dade6d4a4bea5ae935dd9f24da8eed6964. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GB8KE2524266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0888a4993c366daaada8aca73fc922486a8e5db6d618fbe38cc357a46361ab0. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/GB8KE2524661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9da4d74874f2d02a76dae1b12e62df7bd884b2b22d2c0398f0ac3e670ee8de. 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/GB8KE2525282.