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 0x2a36ff8e80f9e4767aba376cb363b10055df15611a9b13f0e27a29d1e2d70583. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0b61761a-5519-4c9f-8553-2c0424f187eb.json and https://artists.proofprofile.net/proofs/artist/0b61761a-5519-4c9f-8553-2c0424f187eb.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 0x53da16006f02c5ac5600dda7e4ef9922c093b6b7238d3c61a242d67113384018. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/GX53U2458686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec825623464f2ed00947e8dcf1d11cf7b3c7b664fc8669cf8f0c5d4ba217f1c. 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/GX53U2458687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ee2a12d7cecce0e1c6d9c825c86d753f0ed45ded6f6b42591898455c38ad22. 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/GX53U2458688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0693193fb47b2ea939f9986f5ccdaeb476fc54b9542ff5fef99a549c5f8fcd71. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/GX53U2458689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c91b895a1cf850babec404662607b50d3d76af1852aadbd75120c9f6580e4e7. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/GX53U2458690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145f9735f2d382e40697ac903cfaef8bde430ddb4f00799a6c119b3294129478. 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/GX53U2458691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1875b7fa4e35558791c60b910039a0fccc5c128d67d3af05f767c46721aead. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GX53U2458692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40af332afd5e0af1f7c0c03d297a7f630d157698eaa1ac75762440374adc482e. 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/GX53U2459163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4375d2f8624fde180d830910249a10cfc43a063cbd40236f74ca0409ecf17af3. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T21:10:13Z), 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/GX53U2459164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5daab8b615b94601857ee48462c64a461580a603cc9185c2b4fb6f43f34c4ac4. 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/GX53U2459165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51b911acc45da8a1c8aaecd9356b7c399ae513b605d6607d5b060bd2a23d71f. 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/GX53U2459166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da74e076e442426ebbf5c0fc4933c4b1dc1c3066ad1b6904659eebf39d627b6. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GX53U2459167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e3e81ad59f5b1a0d37614aeef20e26b60fc17e2ea9ce61b0130a01e9d6a9c4. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/GX53U2459168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4565042b81e20bbf5a9b8c080bbf344d012ad0fecaef5a686c7b2e213adc952. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GX53U2459169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd906fd20bb1f102589441b5b3879f1b18bed6f9bf89a0917068df2b6afc7c02. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/GX53U2465684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2f0a58ecb31f8f4bf19ae786db930110320f85d742cbfb6c86a319a8eec007. 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/GX53U2469902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c62c3efc415445feb031ffa913c3471d05522825f356dba551c8c8ec4f917d3. 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/GX53U2465496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae0880756c74ef1f587ee94d5c5bbaf8da4cb6a287685563660f7797eef202a. 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/GX53U2465669.