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 0x651db3c2c894feaac67fa1b2eab81fc99548612e9d3889eca3f1839cd52a805a. 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/e030ebde-327c-4441-895d-fa4b70511589.json and https://artists.proofprofile.net/proofs/artist/e030ebde-327c-4441-895d-fa4b70511589.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 0xefb15204c2071304f0e9e70963fca264ad2c993f1ea53bf8f42aa9842dc0f8eb. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/SE5751928896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93f4253e1aa4c2426f358014659c1d5f54952d1569cd760135fbd119a716ed5. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/ES71G2032036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea39b62cacde0e332d8519d49733f12e251529df7f3df19c61ca9ea3f5309ac3. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/ES71G2061347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36694a617f5a3fbfebb02c4ef8ba49633c82790241d073d3ae90df67acd60a93. 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/QZHZ32194733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36694a617f5a3fbfebb02c4ef8ba49633c82790241d073d3ae90df67acd60a93. 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/QZHZ32194733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084f220da44463c26055ba87d1f7ee99412e02228b2e83c31db8da29cab71479. 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/ES71G2133411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084f220da44463c26055ba87d1f7ee99412e02228b2e83c31db8da29cab71479. 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/ES71G2133411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c210f70a060d0b39d30d6f1b8968554fc2f83f73efd36c51cdc475f7f2f0e96. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/ES71G2201060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47403d3fd136315f889f5db60fe61af859fe82699a0f97e70beca1792429b286. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/ES71G2237220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f243e16888b6f0441ca7c0077f005668da872bc2d3241953cebaaeed196751. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/ES71G2237222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e02c47178f4f986f8a7216293ad81343f464f1b988b682cfdcc5bf0e4b24dd5. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/ES71G2302884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99050e1885e8d481b7e7b49fbd8496f22ed932bb2851127e3685c5c14556c3a1. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ES71G2321219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd751bbd65f427beff7d2710c9eae3c30d734f5b56b9617d1275488fa954b7e1d. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/ES71G2321220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0925cf011aba0a7d7873eed33f224dc52d41a4755c2c915a1fc01d61f886ce. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/ES71G2326959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0925cf011aba0a7d7873eed33f224dc52d41a4755c2c915a1fc01d61f886ce. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/ES71G2326959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f16b68ffefeaed325b1e814e99ef32db2af6bf5add15b8e767972d9e6fea6e. 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/ES71G2339269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f16b68ffefeaed325b1e814e99ef32db2af6bf5add15b8e767972d9e6fea6e. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/ES71G2339269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90915419d3280799aa861132cb54fe76b73d617d69bf98cfe7c0d8fc83999a96. 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/ES71G2408015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90915419d3280799aa861132cb54fe76b73d617d69bf98cfe7c0d8fc83999a96. 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/ES71G2408015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e62a09717bed51b3205e2e7b8afafcbf97d3b22167bbabbf2403710f7a2b7f. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/ES71G2415007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e62a09717bed51b3205e2e7b8afafcbf97d3b22167bbabbf2403710f7a2b7f. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/ES71G2415007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf7cd3145d29cf22e80c48ece585961e8cbed8149ee9703d7fe4cc56a30be70. 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/ARIXB2403195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf7cd3145d29cf22e80c48ece585961e8cbed8149ee9703d7fe4cc56a30be70. 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/ARIXB2403195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd229e750151db1d19141d3626b32eb707e5dd91b40eaa25546d11e1908ea248e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ARIXB2403196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39b9eda1ae99fb97e69f233195840f29856ad365d78d545d05c8b1bd6c5c288. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/ARIXB2403198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7192de4e53779f9f89404293a91cdd073fa675155483b75ca4c7b05112f110. 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/ARIXB2500031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a46e771d7db2ee022a5d60fdb1afd3562bdb33b5f83fbab8b853faeb51ad8e. 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/ARIXB2501990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90915419d3280799aa861132cb54fe76b73d617d69bf98cfe7c0d8fc83999a96. 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/ES71G2408015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df0e7f503cfafc4c9f0d1bd11186ec3f35e3e8f5f4e2db326109a19a966f039. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES71G2416511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87bb3a997b75e6ca363d792f0042f6fcbb2478a799315a077a7c1848654a86e2. 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/QZZ662475033.