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 0x0572f164b484f03392ba009a3b512d3eeb12a0274e11422bf5f5c2938e34fe9c. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/461a61b8-cb2e-4d51-b855-f113bab0afa7.json and https://artists.proofprofile.net/proofs/artist/461a61b8-cb2e-4d51-b855-f113bab0afa7.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 0x1976f7c77d9ca9deafb64e9e6182a70eb2f3b0bafced6c23e774c297bcf3cbab. 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/GX8KD2437426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf347f0e7e05fd0e3e3969ae3ac69de5abdd97a36dfe24da75d634d386e00b5. 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/GX8KD2425240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b224f337b6de5b7c08c50383335f7e19e6d3474dc12f276fedbff7a91533790. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GX8KD2429013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a228f5129de3dc4e5a97c68bbf5b42a562e58098834ad1d20005d8eff6f502. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GX8KD2420242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d469c4513c5a9eeec542be5e611edb0b8d6c11b08d4592c512dcadb5616258b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX8KD2495177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408786e42eaf0006edb314f1f4e30d75b7bf37b02379e6e345b26689c724faf1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX8KD2485902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5c5a8d604d759e5d5533e6ac13eaa4d197d9a7c53e46d0585c35cfaec107d7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GX8KD2465778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f3980e562b0a541a212c7480fe981ec556db24f2ddc5dcd3911df7598fab4e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GX8KD2407802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb066bfc9248a883630c7c845f10a95ee182638380b1910c4f453e8ba71f04407. 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/GX8KD2484626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec40ea1ec8eed1cf94e2e1a1a176369c65660c8dd2be84e4057bb89ce7d4abc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX8KD2420463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090b8968ac85f640614dde2a63e2281940ec37e7acd7053397c90f3fd70c5669. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GX8KD2431717.
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 0xab572990c86d58e366737eb4166777571bcfa02e13a04e16055e75624e6212dc. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GX8KD2441867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7cdff29c52046c45bef731f67a840fe499c4472ac4260b244e0dedb8e4a2dc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GX8LD2424010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad89aaa19f32cb5b9ea1545228c2de0a5ea45d75c09054de3015d87e40ce39ea. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GX8LD2450580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7c31c2d0ff65855b979aa72d73e2ead3a197db3e971fa5b772a58a25c690f1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GX8LD2410323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af4c4f7939b84dc31441fb39fd14352863b1de17296e4616889309a49dca838. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GX8LD2477313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2139252773b0a6b5e872902992387c48407c220f1d296411b52d684b38c3493a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX8LD2447875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf2f31c7033be3cff72ad4981eaa8240612778d693aba14a4357be6ebaaf090. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GX8LD2455512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c79bf1a7cd463253e8ff3b8258b7dc6af5fcd9d86fd315a4368d73f1127d81. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GX8LD2477924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c4e69c386d9eb86097c48cc76dd27c62b04046ede7403ae27daeaf0f268f97. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX8LD2479061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa413478bae9cc4e997be58b9c21db606d6404ed42345e9364b773a23884bae9b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GX8LD2451250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2993fa94a06ebbf22e1be446fed010ef456f427b519e8f0a07a08807543bf7e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GX8LD2489944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49c257a35f921c9d4e0b4406138f8a535b8617995b70ba35312f8c385143dc2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GX8LD2412579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b97a8aa773149be2426152981a31728c58467f356794843e12d6ba1ae7da732. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GX8LD2439777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7f3a0cf349a3d4c11f189a341693be7e5a93ca29d1f32251e955f8cba4edc9. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GX8LD2471448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ce3a77ddf69c7677b0148fcc3ffef8229d51e47036ac6b65df13f2e49556bb. 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/GX8LD2496473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e317b918b7adba68fbcdf024415c04240ffaa7dc831a23599f93f9d652e1ee. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GX8LD2443581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f5120914abd0ce3af88ff2a1ef0cb5511cb7ba821ed1434c835dd654baa96d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GX8KD2424053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e244c6c68ad171d60d2d90dccbc87518691ac59e8698b269a5a4acba090b01. 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/GX89G2225580.