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 0x4da52bc74d278ebdaff7d73e8cb24a2fbfafc7ad51eeba90132d39786728aad6. 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/81275d5a-5edb-4c9e-86e9-f9c0e1920845.json and https://artists.proofprofile.net/proofs/artist/81275d5a-5edb-4c9e-86e9-f9c0e1920845.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 0x308f64da070ab87bad360cd2a397ab6d2644f363ec6057e9743558f33f7141d4. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USA561068245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0a723c471b9503381d971f3044c55b46a2d8f91c5b0713de512636243fc63c. 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/USA561068248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41aee6dadfb07fc66b1b7b5a9949b38d06499984502faf599ce9a4da584cdcd. 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/USA561068250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363e105cbc96eedc8d0399e8a09a24f29523b62de17d65c1c73e41c74664b2f4. 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/USA561068255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7b3d9412d20f905fbe1e2bab60e69cc99298e2b19dd6d720a8bc6ce28d5f4b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USA561068256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3977b1cd89336f00924ff1525d099b6cbbf014301a6aa129c86fae8897cd9e. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:50:36Z), 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/USA561068259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ceffc3c7f4fbb16744f2af2f3d89e91c611301e740a838c26c88582241b743. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USA371141051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f32d8247c4a76a90a014f1bf365245792854cd60adaa4dcd37fd01479950771. 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/USA371141057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6d5a41bd4bccea16e3030c60188177aa28127c13545c4175f16e2cdb673351. 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/USA371141058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33c1a7a31ed85ee047ed6b586e55185fe0801a28aaf0ffa24824fb0097fa116. 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/USA561068173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd0a146ef7280c1eaa4523492fb7f150e404bc774d17404d67b9114c62bfe06. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USA561068178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388a7d613de694f34c9831b61cb7c35094211337c577c3b9720a8cd0d981ed6e. 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/USA561068184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f93ebb7110e32b50cdce034a0cd08ef3ad5461ccb912dad91319376334f24e4. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:54:15Z), 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/USA561068213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93621497cb62bdcd16abd53a5bd0aaa354d3cec4a127c942f4665bdb4f9cc95c. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:06:09Z), 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/USA561068215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6bb0c41a0979930010655dd704c4d861258016b5b0e84d852165bebece6092. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:56:42Z), 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/USA561068216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d563a3f54e30bdca2ea62b3cb610448ee39b8a8003efaa8bb6a7f580dc8d55. 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/USA561068219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd474e7dd31c50be7937bb3f4eb3505076d3dd14a793adf6a2a0e4771cf9c72bf. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:10:26Z), 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/USA371141115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0953c98512cf6ec84e9d8133a836f1709fcaf10e4610ee57634abb73094049. 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/USA371141116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aeab1508ae2457cdd191a489fb08d13bbb2d295316f4720d8e4f5b89de7feba. 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/USA371141121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0086cb3fcc43a9f6444bedb8f972438caf5525c8ccf3c1756efbc62d40883867. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:07:20Z), 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/USA371141122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd269106a4cd1c8f34f95d11de63bd036c32a69b89ad71308457fcef6533cdeab. 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/USA561068172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1844538f96bd7fa9c426778094ad25e049403e1e60fac4acaeec0021979229. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/USA561068208.