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 0xd8c6d2a946cf84ffdc84e6a4f9c0874761e9c6d1006796519f49acb91bac2e9c. 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/f70c4bf7-eec6-4cf8-8613-5dc989bebc39.json and https://artists.proofprofile.net/proofs/artist/f70c4bf7-eec6-4cf8-8613-5dc989bebc39.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 0x9e43a08b0c6c9701e0241ad4048bed30cf46c7aebb28f388c329e5825e4a17ad. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:23:55Z), 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/QZNJV2038809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6fdeacceb7207460b2cd3590ef5c55a4ecbf4708e09219d16ab6222d9c9df1. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZNJV2038810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a3761ad559e4be78efe0c3bc262f11bff70920d8b58c392ae34452e5010967. Chain 2 (Bitcoin): anchored in block 958676 (2026-07-19T05:43:13Z), 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/GBRKQ2453682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77126a4dc33f46a84c64ffff34f2d87452de46e8bac9f386616738f3cf905ea. 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/QZTB62363036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48266c9dfaf3c9b54663e1bbc26531956f2782b90b738dc7d4d87c656abd79a5. 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/GBRKQ2454200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8cbcfe1c281b663494b2d3c10a29459f7ba625c4db8c97e599b6034c878078. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GBRKQ2454205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb498dc0a5b22532540f6e9707106d3862171a0e20c6e556755d14056f6771994. 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/GBRKQ2454206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f64482eae89f789604d06df764e3310be10a8a7d978df0377cb9c27cded798. Chain 2 (Bitcoin): anchored in block 957611 (2026-07-11T21:33:50Z), 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/QZWFJ2395537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8181e4a0af1dd65621f1882d695bdbaf4865e38bdedd42e5279ffb251ff1536c. Chain 2 (Bitcoin): anchored in block 957611 (2026-07-11T21:33:50Z), 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/QZK6K2382144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3267b52cfecd24aac145a5528dda1814054a82f8273edb5f354a088d0bd7a5. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:36:20Z), 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/GBRKQ2449184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc0b460b98d9f5ce7a91b0ed2f0e0cec8e5d47fdaf817548c69081a0f33af4c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:04:56Z), 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/QZTV32492682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd15dce467cb68685b4383eec1e0c2729f962206f701195bac1e39df7dd7690. 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/QZWV32446971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376ce87814e2d9b4f0aecb65bf739200a9dd506a6e8c09148dac62d997fc6701. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZWV32446974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08031da9ddf954666c04f9855e79ac7668fd3917d00640c74db5bef83d7aaa5b. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZTB82239774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22d13785e2e4cba1a2009df0608bddd1669cf427a4943a73ad5c62ce5d0130c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTB82239775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf840b6a398931afbc37d040dacb2d617f31b93fd99a5234face685f50cbdf5ce. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:22:23Z), 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/QZTB82239776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fe9ac766d72e0b15a2f27f19f3c4d1e340a2cf2aa7e58f85fc4a7e946fb82c. 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/QZTB82239778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2e3310f5c4c519f6f44e61cb217a0410b3c5fbf3993526dd46045953ac930e. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:37:14Z), 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/GBWUL2583381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1129ce2e2092c9938b70fa4064d848d7f4366362fa97a20a135346ee89030fa9. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:08:09Z), 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/QZ5FN2515798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8a3089e4d6b6f47ea55c6cd45ef98715d2397e775dc8121a90a8b009b4ecf7. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZZ8B2411214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd110239e91fecc59fe4a2b9892f3f7947303ff5d12d1430175934fe8253db295. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE3GO2210701.