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 0x9cb0c387f1f0e981be3c93a59b45a7fd80bf766e3fb3723db8b3fa542bf4c976. 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/1b7f69d2-ff0c-4228-84e6-3ca3375e989b.json and https://artists.proofprofile.net/proofs/artist/1b7f69d2-ff0c-4228-84e6-3ca3375e989b.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 0xf0d15cca8bdd03ae16ad63cb4510d7c478ae3dcbdf84414275165ed2191b8392. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/TCADH1721976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45513a038b4f893657efd71c5837b7e0629e6ec63392d4e4117a0a5ec023798. 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/US7VG2002062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8708c6ad67aaf0dbd22554836adc1a631aee025881c510e5e128c0a93ab1d26a. 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/QZK6Q2004534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c952b82ba4f328c9f4b176f689f5a4e3e4dddc97d0ade7910ff6ef78f9e0964. 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/QZK6Q2004535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38dad56d021b16b3af1b5ecf708ff74b0fb4097ea617186a6da8a8598c4dde27. 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/QZK6Q2004536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaeb6de2ad4bf6d3ce594d3abca83c99953c25a0b6dd69d56c664ae85bc2b31b. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZK6Q2004538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79fbe2c78d274065576f112d859dc99ec30c1d1d8905311ca2ae3f36dc68fb88. 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/QZK6Q2004540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad68508d5995ed9d4db97df7c2ef988d36505a30e434a48068b4b36716fd35b5. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZK6K2032802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fadcebcd12e8e687c9563931248dcf74228a87349bb07312857684a2ecb40c. 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/QZHN52120136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd560b8dabc1c29a4d07ff457483bdf134284dfb7b1ae82bc194ede7c2213d3db. 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/QZK6J2105141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8098c4565f6b5603b981aaf40c35ac8931da573ae515e75cd40966eb9b072109. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZMEN2110480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a6d660fc497174e6c9a3ec4ea762105d5e152196ba0b8aa9a8891fd0461db6. 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/QZNWR2133293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87908f1f717799ce291cddc99d9c1efe1396318fa7b726abc66ca5f12faf390. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZNWU2122603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc756c5a822b05d99a97670fe5f2cca18438a71e1e4e1e5d3ee32158e9e3a716. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZRP42189749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e5892bc5795f31f57944fd88279b280486f007cfbc0c7c090d58b197f18f1f. 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/QZTAU2138145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1ab6b9d73b83d1f494dff86fd5ec0ec22e04cb2b75947018f18edbc5575f4a. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZTAU2138146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8da13ca8883e2656f4cd60c42f7c2c44d8788b359a87b61c16d77dc05abd74. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZTAU2138147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70959a3c389725741f24f6bf392e876cc5c61b170e834b7896f1e9f0d8ed9efc. 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/QZTAU2138148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f08f3fb3050225d63d5814459259faf81cea340b8762df7269f1f0c69ff1f8. 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/QZTAU2138149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc4067ed789830fc8220144e6b43c9bdf4a4929246d0212e018d8bdf881450d. 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/QZDA62213311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921e3a21552d3026f594727d9ef4b3420b8bcbd5804c6a5222bdefd5c857fa36. 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/QZES72295374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af5c787e683ece9d2782516bf28da345ee72110266665b325108a920c3b09b5. 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/QZTB52277047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbab3d78140879fcf334895a54e6f8bd184ce00d87044581fd24c741d877a7f0. 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/QZTB52277048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4abb0b3326824d3d3bbc5eacbc667ffa276ac9a4f5bc3d4ecd54a82ab9635367. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZTB52277049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab734a536d1034a92e262e2f2d39b1c501610129d4eafd482b80a055c214ec6f. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZTB52277050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c26b2ce36bdc7654a6b95989643961de0becd20f56c6c29cc7955903edee236. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZTB52277051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7a775533acbbddcd984804d77689dc897bd59beba83601bb12d8feb6965c52. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZTBC2387931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc9202dddbe77efc5c6bf3ddd6c7dccb34228687af316ea8354be0160be7b0d. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/QZTBC2387932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d88471d657fecd99ba4bdf24c3424ad3ea3538e24c4dbb5680e9d6d2e7eee67. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZTBC2387933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869274bd8a65c60c2136f4dd701a10d785a152a968093edb345f65f199b37328. 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/QZTBC2387934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce624d4a654af3738ce3d9f96d4dc35223e46d1e1c3b90d22af7d8bf34c4efd2. 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/QZTBC2387935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2145ca3c42b7f40cfcd9fffadfec4bb8a841adae3fc921031d639f8f29f9e47. 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/QZZ7P2441987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf78e5492c74d57ff7e0ee668f76d86c8f7d7123bb0dcdb258fe1ff22db463b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QT3EY2446470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab3eb26d0c274eca681a6e22acac0f6c2f8b8390d6a8d89583cdf43c85aeb77. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QT3EY2446471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858e37435c53067f28bdaea8bdaeb751be0bef355ea0e94275c7d2927eba1fea. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QT3EY2446472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdcbba9e68fb23fab8b0c9967c5d86479b7370240a5dcf0970aceb9b1571c923. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QT3EY2446473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe385b9ebb3c5563e8b5cfbe686d21afdd917a7bcdf2b1aca86b18f988e1f30dc. 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/QT3EY2446474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b558d80b76831b3a1a57801e0b4c69f6094590b3111bd235b61759710f66e29. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QT3EY2446475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5928b8bfadd03b4ca36ec46ff2280498a9aad9b60d8adffa67cc4eda82c52992. 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/QT3EY2446476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d1ceec351641fca67d7637e69381cfc95d9982179e1365b5bf42b7a74a6382. 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/QZWFM2546804.