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 0x80da29f0960c3497f4b82cec3f0fbc9aa66d1b0d271649b16aae7e1a34af3c85. 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/dcc74919-8e22-44c8-be89-1b8c76daf608.json and https://artists.proofprofile.net/proofs/artist/dcc74919-8e22-44c8-be89-1b8c76daf608.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 0xd9192ade5f2537d6eb2c82c3bf105c19ab93f7248dae381568dce2e1f57bf237. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/GBSMU2013407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786b52bf78b42763bb862bf3e18c4b10f910e2f0739ac51d9cdd40d111678a35. 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/GBSMU2013409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94eb22013dd1ac6f6dd8f493a872708bc403a2ed9478f83188501c37a0c5489. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GBSMU2013411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477073342ce308ee64e6c58a15c1255907a3287656ae4e688a301113ec3ae928. 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/GBSMU2013479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa265665638034423c805c728bcba55e318819dda02d3fa1088f972c8121d1497. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/GBSMU2013480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd111b9281f315ae9a9e0096ae074d6bed764ace447814f970e7c57c65115f0fe. 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/GBSMU2013481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24daadcf70e219a0bfe9821960067f4426961bda7aef78e5d7d907365b069bf1. 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/GBSMU2013482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0f692ea4cfb05b81ed02d5804f23289b283af75e0679478bb727cfa495420d. 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/GBSMU2013483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539aab3dfd7e8280e2ba07b2750337be6c76d6ba86eed457f2d259c8af2eb848. 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/GBSMU2013484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4bfc6e272275bcc9fb23306a017eb79155a6f8dfac58fa447e83c84cc04bdb1. 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/GBSMU2013485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4db01de66297678c563dcc0fcc3388a334bb549fdc9da7e7983d9caaeebe28f. Chain 2 (Bitcoin): anchored in block 957057 (2026-07-07T15:21:38Z), 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/GBSMU2013486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc808e9e95693541be3c01a1f1b3f3e7a9a232dcdcd99df07ea7b9a57764a91. 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/GBSMU2013487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fea989c664bf255c8c944284a977daac784b9bffb75f2818c972cd348751774. 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/GBSMU2013488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a4cc898e2826681a9d4342a5c6e9011cc453a381a85c6bbb7b643dbeca82da. 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/GBSMU2013489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58a8d6910bc7e5004f80ef552225bbddba0401c0e3d245261d34830b4eb433d. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/GBSMU2014724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1df4406729122dd2477827285ebbda2f8f5c345d9fe57f4d6d640ad5752a4a. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/GBSMU2014726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe361159e16e93d4a742a108d6c0c963553b5a3a33ed389e664cc22d8483e7e8a. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/GBSMU2014903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf523dc9d68442fd981cdc2c29a7c5ae4d452081636929d81ac74246a8ed8ee. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GBSMU2013593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b44bed48f229f0f282bb2f667ada1532d5bfb88f503c24c9461cbc06511ad2f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBSMU2014568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf941c314c55c5dd0adbba4b04e97b9400c921a906ec81ec07874c51b6955ea60. 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/GBSMU7243314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd4e90f209d9450bf8c719471fe0e9027aa1cf6a6cadaee0c56dc8b6a63a0cd. 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/GBSMU7243315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65123b7132bda73f771b63b5edcc73f07d065179e0f7c62781a643f9b2be05f1. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T05:20:29Z), 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/GBSMU7243319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98148245b18409b8ab69e2f6f04fec8156023bea31c5eb62f81421ee73ba3cf. 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/GBSMU7243322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fa597dac5f795ec7593489f503af80c7ed6be4a8ac2e86976a0e94ebe41c3e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GBSMU7243323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d24ba002bcca5e0e5f4d622ac10a8a26e55ce15454705eece3895b54fb75a3f. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZPLS2103755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd068c8c0f2be0a57ca94f55198957c6ac24f4272f3abaa9cb68da48508b2bacc. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/PLC062238843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d27c7d138470294567ce796bbec6c72635541ccb8ca2ab9e3a05938ffd6511f. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZES82351265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f567fedfb2ce1bf302037b3570eed31d838ab03c0c46c0c15f34efdae39cce. 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/PLF242107918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281664c53b5142954e06d85bd4d43e45dd3278d83f38d523c859eb0f7ac3de80. 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/PLI365367300.