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 0xf90f967c2bb762463374242ae00692b07acefb313498dede3f3bfd40199f33c4. 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/5d812a57-ae82-41e8-90e3-de9605631228.json and https://artists.proofprofile.net/proofs/artist/5d812a57-ae82-41e8-90e3-de9605631228.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 0x13b6c55cbd82fb6a21012f5661a8eed029d77bb512016d79bda5887d0e3a20ab. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AUMEV2437054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d301b435beddc000c1a30a245dcee435028e85ffff00f1b87fab284e9b139f0. 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/AUMEV2314955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0fcd2d629841ff2d1db44e07874b46465191fb147451765d6aa4f627130590. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/AUMEV2314960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8b658b6f29bbdd5763f119660a09fa2f8a19b713f8354fa1c555b6939d5a77. 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/AUMEV2314964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573797c082b1b0613e83723d106b96f014196866d5fd3dc3074e26242461a23b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AUMEV2314967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e312f695c47013616b96bfcebacb89ca92cf8e4d5dcb07453f53826096abe3c. 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/AUMEV2314968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d82f9493717a2ee9c422861eeb50c12822820dfdd75cec6438daa0fb72cf256. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/AUMEV2314969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0158742f1f22fb4ec3e3f28283e2ab905f02c33427502029988f346dd6ba509a. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/AUMEV2314970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12207dfbc0cf2cdb04173782dea9e5ba857aad3fe09eb29a60ac3cee547cfe99. 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/AUMEV2314971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb74f5cbd1bf551ec8034a36b18ab261d1acf712b8717c0070f5085700e4beda. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AUMEV2314973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c068ff9b7e2c6f9d5de98f926d5387ac59b3beac07bba1c7cee725813f6c2de. 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/AUMEV2314974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1554cb1c36590b164feedb9993c9d857fc459dd8399942f36018cc19aa18678. 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/AUMEV2314976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bff38faa578ae26f8bab57a86b8b163b18aa745bc49cf72cbfb20356c520ba2. 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/AUMEV2314979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520faccf60a040fb4850f5b98ca097024a25579eba87029a10a59e959e6b40cf. 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/AUMEV2314981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8131f1b0e73889e9b63fd5d894892496d167132034ce6ee58f9ea8dd8dc8a2e6. 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/AUMEV2491245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d449bf724f8eaf021a5ddb898da7a6c478457d979180aff217f0c0556b311d. 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/AU3SE2401499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f76551b823ece41ec52841935b745cfa56d50ca7796cb21f891588d08c3dfc1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AUMEV2431911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486f087af2910163c82a2486dadcd3c6c2f5f061a739f851f2487c3f1b36219c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM4TW2498351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e52455480b19ef3e5a0cf6acf5f2022e2c46f58f48dde391798498431c035d. 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/AUMEV2261001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f43dc230f2e671d8e2ef1e7bbe02897bbdde3c11385d8f1c30acd119db05ca2. 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/AUMEV2246873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59dd945066c2d9073b09b74131b0892d4d62f7e1e827ec19935ff087905ba421. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/UKR6V2211804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ad2ff8df9ea5ee00aa17af87753ecae054a198b1c1b7af736eb7e0af3fe2d5. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/AUMEV2233182.