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 0x94fd45459b082942ec1bdfd967621d412a584c36879ef91eb7b015e34d988674. 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/484caec3-a94c-4629-ba58-df2d3f77d534.json and https://artists.proofprofile.net/proofs/artist/484caec3-a94c-4629-ba58-df2d3f77d534.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 0x98f519175506f7af505c2f44eaa02cf505aef5537492ba03ee8a50dd47080f82. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QM42K1910474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910bb3feeb62b805c169257d23ed73d4f3203a832d77d59a8f221a6a5173f1a8. 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/QM42K1993920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e217d50e7124450a12de5f124584c777e00d9a708eb9abc18c484d904cf0b30. 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/QM42K1952137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b6c3f4fffa55abf5c05a41390e60d3056571d8a7a5cc2a633427e4943c20bf. 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/QM42K1926660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0916c8d7cef5ae32b18cf642ec86893d58664ef904db0a7eda52de2647c3b025. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/QM42K1930089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2567c5f8cff7beb7d78b39fc6f2f369cd05e55faffc3e281bfe3fe51b3e497. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QM42K1981220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f9306c528ab1be7f5db077f00b46998fe98f165fe89e66a7f752bf399d8fd1. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/GBSMU6732484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d506b966aded3e797cb8442b539b985267f3a273f12d50e86d6dcca01db1f5d. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBSMU6732485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0de41aa283352cb774ebe003da829cb64a44f5042e091b9767ab35e3f3958c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBSMU6732486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f976a749d74abc58419c18269447c7fa7b1a70729b79154ccf62c453fadb21. 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/GBSMU6732487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f145f7cf7ffad0bb1809b6b45c863d5eae4a057460987ad61ac02decca39a16. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBSMU6732531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78393d029fe7fe705e6a40e5aa2685e781237149e853d5933f66528fdbb1a5e6. 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/GBSMU6732533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786ed907c8b5884091e8f4b6cbbad654d799c567cbd9c4849a7dab4075854dff. 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/GBSMU6732535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe482ef3f6645f2dba3b27cc25bdf8df6ae5c91dfb1adbf52dcfdc2288352fb30. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBSMU6732537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6dcf82d4d352ead57e5ff325f3f3a61dc8a298ea422245f699970073112ca0. 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/GBSMU6732539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c1cada58608de1badd5531b2f342cecc1fd4f9d43ef19287910fd27321029e. 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/GBSMU6732550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30be07f2c2e93a992a70f2076594d27d0e05e75e344e2fe3542c027aa4c0a902. 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/GBSMU6732551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1616d41f1007978adce846a1e6bb5a5ef1f20955a6525436c7fe8f00757da850. 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/GBSMU6732623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e72c8a3f6fe899174b6aeca10c784b88e701dccd02ec015406adbf03bd4a23. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBSMU6732625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e10d47efd46cac83fd3fa91d22f6e477e65d49dede637355e7fa0ae7789084. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBSMU6732626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c762e8ac49f716746abd298eba3c4e6f285fa210a113917b8b073456ca70347. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/QZS652310466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ef2d92ed5523561eadd4470c06e2ba0e2993603a0cd71f15909907cfaf7e6b. 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/QZMHM2307718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f75ea864b0f3f23ca0a637e45f5a83539e76b119e3fded3b4ebf0b918297cff. 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/QZS632388808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766ef302bbd1af4ebc47e8242f9bd2d9029f385745dcdb9b70659774124fa0a9. 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/QZMHP2355126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc52b3bfbe609ef96cc2796981212fc3c58d5ccae1afe0250c652df9617df93. 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/QZS652315736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac90ca0f3cf9683c7008de798f7bf7e680fc3c6893ff5c35bb7b5325a4426d1. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZS642353381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c24cbe0a715ea0d4a81fc74de70eb0cf6f2e06125795352346784ae401c6c5. 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/QZMHL2376940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734eab010ffc970fdcfd579f2f126d44afe697b76d79ff2e638b636d34b6ce2a. 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/QZS632211993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4e8ee4528548fb5946c5efb05dc4ad5b3813c86bcb455bbe19fc50e6807a77. 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/QZMHL2215955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b368b664e60c4a1f37e72b31984e035458b4b5212743e9619d9059c4fb4997e. 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/QZS662243953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5fcb7c205fe3da97c7e13a9599146a82432e78dbc23bc69586d2c5ac887c1d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMHN2231403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5c743385880a876579b45c8610eda3b0117285cb51730844b89d14f6043ef6. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZS632151304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f62a5adb887c7f31d1ea9d213932e7924663576472816eea7a7ed25eb16f10. 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/QZS652189810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44359b0d97f9b5838336e1810f3872dc81dfc7d700605b35014f8f2e3c0d05c0. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZS662103713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f806755be886ce7d2a18db9c902f624b82b5e6953a9e1dd050d17fcc2f7810. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMHM2026033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e852a872bdafb437aba1fcd0a502a20d3d5a319867418ab182b085c323d301. 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/QZMHM2074719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327f1ae0566b011bf3f0adc9716993e905d4e8e27359ba6867cda6171d90f025. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZCSD1895613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599f8c317643e1ccd16fd0fa7c9d907ebae663d100962faa0f1a721550d460f1. 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/GBSMU6339931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b43b47dd84a1fbf77bebb3146b92e9e17f45f8b6d902ad0883bfb8afc1e5d4. 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/QM42K1995930.