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 0x9be3aa506a94672c78d242500149b3bb1b70348149924446bbf57009e21fb9f6. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9be167e4-8d0c-445b-80d2-68c6509297ba.json and https://artists.proofprofile.net/proofs/artist/9be167e4-8d0c-445b-80d2-68c6509297ba.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 0xea6b39699c8676beb4ae1a53f7eddd623f832ab85b586f97186e3044b214c01c. 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/DEZC62037761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14b5cbd08d9a7e5a56aa8c6e8189df6b8ff3518580958d91360ce631c5b15ea. 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/DELJ82047576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1b00fa106de2b5e93c7c4d03237c8a8686e86e165a744a4d2143b2e3d2d9a7. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEZC62189076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9d51a05c95fb0134fbf41bfe581780c08699fa20616b0ac1927fd3097e55a0. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/DEZC62028498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19dea36c180f17bc994cf46125ccf491635b1d6306305cfc0b934b9949526f38. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/DEZC62189077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad0b5547591cf8a9377374ebbbf64012faf06b5cb1199f76521d6fa205c15fd. 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/DEZC62180445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf44c0ad608a7e4d39e4e9d4cf1d551762505865b34c1b7949a703008386d5d6. 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/DEZC62189078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a756eac77555814b76716ae972bc2bf382c5c5ea6ca1a731958b8808c70906. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEZC62189079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5849af8ebd4ac18b1d82a7f4a8d3b968e324b09c0123e458ae985d6710acd4ff. 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/DEZC62189080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1167a13a06fef3fadf730d404923392867aae63d39dd5c165086fba12e01c0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEZC62189081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b35464b9fbdc4ebc6d6955cd770e7613776ba8edfb90fa21df6d891b112738e. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DEZC62189082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd106ae2660d4f80b2407c8619d283eb2e7a6ab1768186266a24b066a7fbbb288. 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/DELJ82099198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae90eefb7120b482c9302c33e185ce406d4843bf5f10344c8a7f8476ce5d7d7. 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/DELJ82025177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d7ea9959c6a682fb1185ef7c8facd4cf51a7fe70cfad108aa41d12f3457e8e. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/DELJ82017758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580f99ae065f77cb7f2a2504c35f957e8d58f1bcd559d9243dac3296dbed305f. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DELJ82030589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00967c11df3a7e881579bd1d74f80995ab916d9da0772112058333fdc64d0907. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DELJ82030590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9c56eb6c81c720a6c94a1cf58380dfac778d3cbac7d797483f6eea92c3327b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DELJ82030591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7b9dd240bc6ed38e6f14bf8648ba9585f1956abdd0417c168d0aa94416db7a. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DELJ82030592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde01617fea83cc7f6379a122cee8697b4952effda1a9592547d544bd3ee26fd. 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/DELJ81957737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37f8d9da4af440a8da0f9ef5f9abf8d3e0f561e63f3ebfcbd7609b9d431a8a2. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DELJ81957738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebd04ce2c9d4a14beba745a13db008579c78a753357ae11cae74556a5b00ff0. 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/DEZC62132544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e51c9fe0294647c7b2417f3264c07c3f80749431014f63f75e391377351b2c. 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/DEZC62130941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad0b5547591cf8a9377374ebbbf64012faf06b5cb1199f76521d6fa205c15fd. 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/DEZC62180445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711d5bb53d5d349d7e806eba8abeb22bd60aa093d1dbfafd4a6b97097f88c923. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DEZC62047071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6b39699c8676beb4ae1a53f7eddd623f832ab85b586f97186e3044b214c01c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEZC62037761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9d51a05c95fb0134fbf41bfe581780c08699fa20616b0ac1927fd3097e55a0. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DEZC62028498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ce66adbe064a3b85f6ebeff44f7dce589a3459f5f53bb8e70cd780ccc1afab. 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/DEZC62019668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db362a32fa7425ba918ee10665eabc19802bded9a522b78b80b3e7b334426bf. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DEZC62012011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486e8316fbdc874d1163d112586339c6594109fd54041edb179e046bdb4ed026. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DELJ82047569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580f99ae065f77cb7f2a2504c35f957e8d58f1bcd559d9243dac3296dbed305f. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DELJ82030589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7b9dd240bc6ed38e6f14bf8648ba9585f1956abdd0417c168d0aa94416db7a. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DELJ82030592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d7ea9959c6a682fb1185ef7c8facd4cf51a7fe70cfad108aa41d12f3457e8e. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/DELJ82017758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd106ae2660d4f80b2407c8619d283eb2e7a6ab1768186266a24b066a7fbbb288. 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/DELJ82099198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd15d89f94f721c944daf3b1d7b0345cb127afd5635e9182aa0b2c161a1bdb4. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DELJ82088806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f3b61b53f6f052f807904edaf95f6fc5dcfeacd078212e6b81028c7b49a0a7. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/DELJ81904100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe87b1e11989290e3a18ad845fee11b7db9a7a561976180c02874a94d6470da. 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/DELJ81812885.