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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ff1878b426f15a9bab5a131ff1b1e26ef26508c6e25fa48547ff3b7915daaa. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1782b19f-5f58-4c52-9b1c-86ede3b6853d.json and https://artists.proofprofile.net/proofs/artist/1782b19f-5f58-4c52-9b1c-86ede3b6853d.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab34a305cfdd0b07d7e7aa729a231cc967e056cd6402d4063248ebb465e258f3. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QMDA72165116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d0ecd05c51ecbd8c769eec989a7d68336d73f1fe1db22981f6da16fa35dfd3. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:29:28Z), 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/QM6MZ2252830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d89826b0f42814f8e8087269d4119d474f70337c3d17ccd54b96e129b33845. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:25:13Z), 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/QM6N22270481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f53c96d1013f64e06c363a466a1612ed41cc356fdffa90cdc2d524e546ae97a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZN882255284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e84de71b3563fcf95ccfe777e9c4074d51a0fab202f000d584feb64e4431240. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBWUL2295880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72893311478da41c67329ffe91bab72ac1f4edcaf653b59d3c682204f4c25129. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QM4TX2344681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077664c34f46b8101be577b2fb984e1eacea6f9b66fd67dc0345f42420c118ee. 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/QMBZ92353444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0903ccee6c47d15aa9c3f949033450975fe4aff64602cff483f78290ba7948ca. 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/QZTAY2309665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12d1544a71dbdc08fe224642574f4ed6eb2722b1183fb4f6f9a82f6ea71eb6d. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:41:49Z), 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/QZZEC2318784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630153d3034991f39559a62488b66007d918f7b35df089a45c662303a88d193b. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:33:44Z), 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/QZFZ62420136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2f877992709ebdb028e3576ef44f45217f8f7c2b7412558bae3d427e50ffcc. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QM6N22414611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c70318ca37dba9ed6b960f61f4a0e188c187a0e4265645da88cb626ecb57d93. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZTAY2445112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1931b73db62ef6518f602fb1e460014515a109621261078ec9a64c8bbc480928. 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/QZWV32456952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4798d580aa459bd3badba8d0650403ca8f6c9938ac53298ce91f37fda6aec9. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWDW2485363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dff0e4ca8941563b78b280c4ba89fffd4227796f588c1575330c76fe74edd4a. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:51:18Z), 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/QZWDW2488524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631bd1a50e8cf1d8b6039fd985ada86893a29a60020306da9bd6194f7460c874. 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/QZGLM2566016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb109d2688d5a422979bc5441c622d00318de2f59ce63d02e9e5f9d3478a140. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/QZN882561241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92dd7c2148468a1ae3ec35be3a3f8b10cb37176d6947b1613a6a09b2ba29b77. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWDW2524742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e23fda432cf16fd0092ee7e22e4a8cfe5ba29678dfc78c6fc229e434ea01f00. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZYFZ2512872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01a3fbe1981c44db6788ccf35f6aec542e445ab9ade321f0af81e0efa656a86. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZYFZ2515680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea050a0260e6994e76d015adcd41bf3ab0de28134f80fe448f71fb51edb69bdc. 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/QZ5FN2250693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35531b64caf37088e088437bc3ad5a150ee1d550ddab0e46ad7bbe29a97f27bb. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZMR82200288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1731aed6b2a49cb4a2cc16587863f97e7b07c5c16dd3283673eed7f7ab79835. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTV32224669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7074e7f44ab495519517db09707556abaddb4318bef68381d4c51c50c0d7041c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMR82200667.