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 0x421f82d45b66615ef4721309e2ef18a66b267fab2b491b72371631d3139cd426. 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/36917a76-1f4d-449b-a7ef-cf01eeab3390.json and https://artists.proofprofile.net/proofs/artist/36917a76-1f4d-449b-a7ef-cf01eeab3390.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 0x42f9dc84462837867aae2b96517441e3c13c5766f9558ba8217c2032d7667b2a. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/QZTBE2485288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2999622ce47b9ad7b07059aad16d044458246f6050b6fd8c466258f3d37c9b. 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/QZTBE2485289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01a96bf04060c5d95f38a346dc7164017106bd06bea133ad882d9921eecf696. 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/QZWFM2440513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb487cc4030feffe56d840549be347ad8283c42ac82343ddce880462b52d73f2. 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/QZWFM2443858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebbfa7c4f45ca350a2371cb18da23f92c68e27c5741feb2a2a9353df5b952a6. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/QZZ762464159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6928049c61d671a3f5a2a57aa31e2d1ae084e3897088f02749a6d1271a430174. 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/QZZ762464161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c11b36e7fe467758bea9aaccda54ae6ef372b7e8a7957b9cd085322b67d5d9. 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/QZZ7N2412891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c13f6d65c4d57aead95456f6fc30d32e1419cab8344874e9c42cae12b4a1d9. 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/QT3EY2425123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b6add6157df2ac1542be1fc99ebc600be17847183762ff844db6c13d6c7e84. 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/QT3EY2425124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc4ecc81cf4e1ea1486b36e72c3a6433d4b42072059d24cd62839a2be97178c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QT3EY2425125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd54f5dd292674be666082eacfbaceebf91f612662a84364c51ac3fc756791c. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QT3EY2425127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca32db545c23b389c6436e729c50355a41747d1a67df8921eaec11e0e98e308. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QT3EY2425129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b04c608c2c6e7b06ba740441a724ae408edbedec73645a9017f141b4240d729. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QT3F32401556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d5e57833971db304d2aab4eecc31cb5e98bcba0745967c3689d6d081c09d71. 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/QZDA52531347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b20baf9ea228bf5c7319a2bf7d93c9303216a1b5cc58782d23dec0a03d55dad. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZES92505746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf700ff8eb34cc1062f7612f84d9cccd75259f01f81558811a1111ae32ec25170. 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/QZHN82519486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab754d854be5efdaf48bf94b989545cddea7113731fdf14045c8cd40dc456ef8. 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/QZHN82519487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6e79fca695724bf6ae0e6650845850d4b5c1b87ab6c11933d32d9df0b136e2. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZHN82519489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456d9f663ffedca3f7dba2a5370a7cf0cd935f04fcabc652e7727274916e0690. 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/QZHN82519490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9952a39d9ece6700f7c328fe1d7c52350f39dbd9aeb14f47b3ba510f5f74286. 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/QZHN82519492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6fe65270052fab87a0fe6cd36032db3b72d8f96c28ef55b02df9a03694a304. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHN82519493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343bcd6206d1373f5d37b579ab15f535703e5c2f8ec1558d8511e1cd9cb1be5b. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZNWS2553415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34baac0a2c341b156ca3575216896570231abebfe7c978b1aaecd5e0f6ffde8. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZNWZ2552692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b6e3609b7150f9b58801417084a0079f603cb17a27ceb9b19187381c4ccbb1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTAT2515696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef4587e8054e00963504faeb71d44453f90b47c26a0ae6746a932fa86bdc560. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZTAT2515697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed71c4f7dfa4cd660fbe068a1bd138111a802a3434eb83930cdfc249a549ada0. 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/QZTAT2515698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59b8a3d152e25da5c83f85096e5e4dc21d2314b40d11d04e5c2f137b413de0b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTAT2515701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8903cdf3bf80eadfc5955bd5947f20782dedbd5ef2ebe7c0b16c7415bfe84d. 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/QZTAT2515702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6991c044384e71a12a3211d8d6ea60111b09e7b11a3aa0d4a1653899c14075. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/QZTAT2515703.