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 0x5b635e164d8a491e403b90ad6d66536435307209cc5074b52027fdb273b6b56b. 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/8298ee1f-f014-46b8-a4a3-0c84a6d8130c.json and https://artists.proofprofile.net/proofs/artist/8298ee1f-f014-46b8-a4a3-0c84a6d8130c.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 0xc5708224e59cdca2b3aa58e1b6bb42afd012d351ab46639d112bd593e911c4cf. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USYAW1600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b73f6122b4e70875b4669e2a97def9032f399aefb2cbd39e3fea9e44ce57ae. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/USYAW1600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984351d9a8dbaf290f7be5368d80e453e2aae7c591a9474b260c37d4c27b093d. 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/USYAW1600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ba234b933c79b8b9252c8dbfed3b31bc93b480407250ca26507f2a9abadc98. 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/USYAW1600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc00eff08e729503063f7cbb5b04b493899cd925cb0bbb8c00d605c78a6c0cd3. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:52:39Z), 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/US22N1831001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ebf20f99a812b9f2c8d3c8566c4672645e975d0b35076213ac88de1095f77d. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/US22N1831002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d1ee215bb97220483e290495daf627edb11ea9de2d28192e455877eb932286. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/US22N1831004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c250d7757d595cb57a3ffda05d11d31d9ad344e4b9074ad103bc84e09f6e38. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/US22N1831005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20f97c7ee84535f22dd2fdb75dc90ac7a26e9f65843b0879071a623b0e067a4. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/US22N1831008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd17eb4fc428fe9def2008c49d0ee5e401ed3d5b9cabcca43d9e210e5961497. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/US22N1831009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d1ee215bb97220483e290495daf627edb11ea9de2d28192e455877eb932286. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/US22N1831004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59acfa9fbde6bdb1bd55b186d1881f102ba2e51fb79e2cb5abefbf95b1830f9e. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/US22N1831006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6704836353840d8532aafc34b96e092b0e4288aa9e71f05d0fd6cdd656f94aca. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/US22N1831007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ffad291a845a19d5057d0ff61e0ab376ff147d578c758a544a1b2bd425af9a. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QM24S2103610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068faf4e5ecc47d8b9d5ac920ec702625e436f84141be0f877ac5156a6721fa6. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/QM24S2501348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aeb0c512d929360eae6b13b5b7f4989c2d42699a13c2da51a65fbac2137f6f5. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QM24S2501347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068faf4e5ecc47d8b9d5ac920ec702625e436f84141be0f877ac5156a6721fa6. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QM24S2501348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a3a3ca12139dc5c080f32915fb06590b3ac95d345d849a626d10cf647b02eb. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:02:20Z), 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/QM24S2501349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068faf4e5ecc47d8b9d5ac920ec702625e436f84141be0f877ac5156a6721fa6. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QM24S2501348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aeb0c512d929360eae6b13b5b7f4989c2d42699a13c2da51a65fbac2137f6f5. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:00:42Z), 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/QM24S2501347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7824df745629789394d9a3061e903a08e614d7904a268192e12c2d260e8dbd. 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/QM24S2501100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b9dbcff284fb4c01023e07bbde11bca9beb2ef639d354287a3df867b5ae6fd. 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/QM24S2501099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa743405cdd5aec2eb42defe3ffc96b0e94337ae6e6e6186ddd7f9e55fe0d355f. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QM24S2501098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4dd4471ba96d3c7fccceef775c1473904f0f40af2518589878afcf350091f19. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QM24S2501097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93617036de13cdbd1573d77c2f216338a0c2318d35de2f88ded004bc6a9fb96a. 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/QM24S2501096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176b394d9da8e8e3953f81bd435131ed2619bbbc1d769e753c92397854789409. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QM24S2501095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13db0dc72a8570a421606084dc07bbd0fe78d5ad7db7c920b65e7fb557be788. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QM24S2501094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88dee2b332153c9f7c424139ab3e7fbd08350f18bef3e49f476875ad860036f5. 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/QM24S2501093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8db25db8b1fce23a2e739cf68eee5c4bc8b9b8439bb31cb803ed650c36d54b. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QM24S2501092.