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 0x3478a1f8a0070d8fe5905c2f6c0c9439b75fb1782a2d52835ed0f2028fb2ce4f. 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/73018e26-51c3-4686-9fe2-8bc08b2e1713.json and https://artists.proofprofile.net/proofs/artist/73018e26-51c3-4686-9fe2-8bc08b2e1713.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 0xf4ed403a2854fdecf8d669997298464a07e303187a392cf714f5def57dccf761. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:49:09Z), 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/GBSMU6567168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562ee87f90ec02ec4ce11b0f89bcb567e9b89646a888a1eb847fa69c30e2e0f8. 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/GBSMU6567172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e180476a88cfb79724074de6ffebc9c70689d4362d6f40585757ca564d3bb7. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GX4R52268878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15cff8f48f4d50cce8a207e714c41b1965e69d58c1595eb565cb4f846aa62586. 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/GX4R52268879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9097120daf2bebfeb2155f88e4afa681d46c22ca886725eeb707e68a50c7e1. 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/GX4R52268880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eea3bfc789a7d9cde138f165d393510f364ca73b0c5f06e0b9937e1d1b1c543. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/GX4R52268884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940e81d62b6de7ba56ec0d89a3806694256e2d0c6718752e64ed2c10e5b318c2. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/GX4R52268886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15441b08608fcc386ecdb91b9a716af7b0ac6a88f641a50f9c0a4f2236993c4b. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:48:06Z), 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/GX8KD2398306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21237147af8d2ccb961efbf0c240c0315b4b775275ff35766f0e9db1aefec906. 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/GX8KD2365126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6edb95892e96b169d5a5fe7957be02f03fc2d6084acb701e5e5c7555dd962bfe. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:04:52Z), 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/GX8KD2319780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf728b5f6394ef2726e0358adf7b101710654c18f514ee52d5c8fb96f86b81df8. 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/GX3HH2344981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ccf2ae804c6a61a985b82972e631b45b8a76c6a679e83bf3e44d942257dc423. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GX5MX2398064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2774b027a8fc04b49ad96178d916df70c78cdaf82b54510f3867356fe165ee24. 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/GXBDS2493866.