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 0x4d423e162b54dabf6e7d41d4980f68bc4fb03c2fcbc507f0f477c657618d1469. 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/f715ec0e-6f96-4917-acf8-3a4f76696100.json and https://artists.proofprofile.net/proofs/artist/f715ec0e-6f96-4917-acf8-3a4f76696100.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 0x7cabc8ba85175ca3338b753d09beab2d0d8e42733e283665a5592e499dbc3932. 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/GBWUL1913346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b90782ebe09226a279604742fd8871a7d6fb88c8d7267e8302602fe5611b3d. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GBWUL1913367.
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 0x954f6accc1892222c057112b31b05f373e5aea17679b3bf7b1152897becb5230. 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/GBWUL1913386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f424c4f47e9c601a76f5910335571f7770d530d9eb1a95e2b3d7b62a4dfd72b. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/CA5KR2202138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e0c51cb1506627dc56d40275035e6f3193d6a48bf110792d66b50079fb1409. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/CA5KR2218544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44db130a727947470176dc2920e8efab1db3db9116c24b89e9739ca19ac95f1e. 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/CA5KR2319893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10914138035e37f03eb7191ca743dfb32311c554ea9edc7019250276d4e1047d. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/CA5KR2321686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b16f4f8f63d76df48d456ee0ed9422119021197d72b0da70cc1c0e619abeda7. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CA5KR2328999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc21a70bc0172bbd8298c1dbbd574d01bad4fa292ed0ca1594c1409957e0d51. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/CA5KR2336836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5082baee9dd28b16e8c626f9cd2496d27a888925a0f0a3cf1cbc81a7b473a5. 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/CA5KR2336837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fbf75b7a51aeed0a8b6539ba43f815397dde7a6a94f2599275f199e6a50438. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/AUK3B2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b39ccd72b87d0bd3f9b619af2840e298c3a5a53a92204c411a69f8a4b66e5be. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CA5KR2414165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7365f3374c12b3cfebf77b079da9a5ba079755aa567d67282041d2a1daaa72. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T22:59:29Z), 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/CA5KR2433809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f0520c8cb1649b7a08ed27bd80fbb7302da2744810d8a7fc2fba22dea9e1c9. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/CA5KR2440039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4444b734110c54e1c0b87b2804d8225b298baa26c5a4ddd5b48addc24921abc5. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:06:27Z), 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/CA5KR2440040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52891adfb895aff4588b96a1ccc6f6e5366d4bfcaf308b9ba223f0d49fffd98. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CA5KR2440042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600903d5d0454ed73906e31534135da53cbfde7f8c7d4056057ea4fce63889a5. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:07:14Z), 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/NL8RL2460998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab4b13574ba7687f2ca43bbd1adf9537cbe5638443b2a88486c1097e7e55ca1. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZTGW2407111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f6fb2402d49ba9a646c7fab6895130a57fbfbd769386b8ada08abb47e0227d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CA5KR2177605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0686a449c0982e865b9cfcc2ebeb81c4e7e08338fa07459255bd360d74525b70. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLRD52302482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32bd3000022d9d9f7b2cb6cd2dfd23cb4fe5912c9a8ceb4218f3db3e99a69fb1. 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/CA5KR2126559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b7229897ae496a612aef79e3f9d8f420204e52cd51039f0efc44e8e2629a3b. 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/CA5KR0009941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b7229897ae496a612aef79e3f9d8f420204e52cd51039f0efc44e8e2629a3b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CA5KR0009941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2496cc932af3ab33f7a8e090ef10f691d853034dd6ce625aa838c4049d41e512. 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/QZ5FN1910538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff5a8f87ae980ea0cd86063ede8840673ebd60eaa1aa0993ad149381052accb. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBEWA2307416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa596fd8b2f8070fce89f495842b4e71c6ccec1b5c0ad1466a1ae58523456cf. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/CA5KR2232303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae549d37b8b1e469b34509270850561f8fae5b28ed5d65f6f0c0e00ef4fe3f90. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/CA5KR2270818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725a9dc04948e389d46e6fdb498d52cf4ec4e48e16164cae6cdb7fc6ab09576d. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/CA5KR2063619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51d49ce868bf3a3967f89a3cab9dc9c4483b98095e06acf7a9a20ce3efecf48. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QZMHK2086567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16cc09bd70dfc7f12eb555cd906095bb265508d807ad06357ad8c4868366d892. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CA5KR2320835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5a02fe5d73045084eed94a0004452976cdd722be3ae485eab87a880c58919d. 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/QZHCR2000096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ec0a9b70d1ee7419ff4541f2f010fd7c38da6a2c4669a7b2bbbdc6cdbbc232. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/GB7YL2100111.