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 0xf7eed192fac647ebdeb90142f2baf590d6b56ac41869de60de6d165499344d08. 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/b3728ede-efd7-4c1a-8c83-39d5c99c70e3.json and https://artists.proofprofile.net/proofs/artist/b3728ede-efd7-4c1a-8c83-39d5c99c70e3.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 0xcf088705f8ca52ae71c9345aef22531f69f9f27e107465310d1f33a118705ab2. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QMD7U1702046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaebc2aa995039073ec6aae9f91a8e4b77b0177b341c09443f0ee899639debef1. 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/QMD7U1702047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48164a48eaa6b3478264f0aca882cac51baa9661e73a4e8ef32d3b95ffe3c195. 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/CA5KR1932741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7993f9a4dbf14670e32afe99166dcc0f1b99d92d8bf37f457befa1069b4062cb. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CA5KR1939780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2048ab0bbddb6574a2dc5db4dacd559531596fa05704cf8ab67a73cd943804cb. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/CA5KR2038704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05dcbec4af204d967fde3a17d7d253e46c2464b6a81c277e589f8992f605815. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/CA5KR2100465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7e75a0a534c897a86d0e5df9aa70ec648a1b2fc0567f4be8bb34f496680616. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CA5KR2153627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09f967cb99c9f9238b9045dc41504dd1c7ee5c181c39547fe948140f55ff99e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CA5KR2186784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d003d917e84a705d824e5d7839dc95e517c4252b242d14912d7358644f89ed. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/CA5KR2296611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c08fafdd87afb091bc74df6d2dd7db3f38ae485d256c667ca746e30005e914c. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/CA5KR2002996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48164a48eaa6b3478264f0aca882cac51baa9661e73a4e8ef32d3b95ffe3c195. 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/CA5KR1932741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05dcbec4af204d967fde3a17d7d253e46c2464b6a81c277e589f8992f605815. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/CA5KR2100465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16344e8a981123247ebd04e4fa878a001ceff0bea94cfafa22df6dc655f6485a. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/CA5KR2068327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09f967cb99c9f9238b9045dc41504dd1c7ee5c181c39547fe948140f55ff99e. 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/CA5KR2186784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f97749bd03cb90ac6ad030d377fa49f13116ec7d16ba168735596811e21343. 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/CA5KR1832499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6199ade8912184a07ddc627e370a85178fc2e18f1b4f10b1ad0b5ec950ed7ba3. 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/CA5KR2331469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1085c296326e6bf317998302fb5312383fb092022e4c4f81312770bb0aae5693. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CA5KR2382703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201187eb92f32ec98427faac676faa93f36ebdb7bb49119a54d8b8d6a7dc1a09. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CA5KR2452548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9aa390167e547a1a241a8cf73824eed51125df69cb3c4d734dec963c0f7b18. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CA5KR2528178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc540e04f9752a8398347b7267a8f136e8cf1512aebfcca714e24ffe1fd3d47b. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/CAUM82000083.