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 0x0bb788b883c03a1a7fadda628f4a381feb81f4cd878c43cc03eb0a179094abfc. 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/1f5f478f-36f9-4a3f-a176-80dbc3f77032.json and https://artists.proofprofile.net/proofs/artist/1f5f478f-36f9-4a3f-a176-80dbc3f77032.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 0xf2cd1b1acd4fc577011468a9aa09e95c797982a4ed61202c24d30405cf9f3c28. 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/QZGLS2315155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319b715cefabab081ecad7a49d1b6c8bf70710000dd4392c2bbabe14a29b23db. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZPYN2366736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87fe82d76da3f3d5b912f1b16e7da110da27f25e46f4024f12d1441e13cb264f. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZNJV2357509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f98616c68b355eb75f2bc1f9963bdb1f070335b51fdee410eddc967d1a02aa6. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:47:08Z), 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/QZPYN2370120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc55ed2b8769750cafb5eb73264e913d7c616f4bab7442199a25fce4679fe74b. 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/QZNJY2318551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca483c938a7f6591b87affb053d0551c861a98b28435001f4e3c7dddf36ea49. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNJZ2362058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc18fe7d3c74d745be71ac0fff94c7616b4c99296cb93042cf481cf75bf1f285. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:55:16Z), 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/QZTPX2376826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbec355f5e5bcb7c67db3673ff5101336549cc1f948b1c4443e6553a5f99f4c0. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZTPX2398913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5321026c40c0d1228fbdf394df52e83d602cb495903ccb0ab217439f6754dcb. 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/QZTPX2387391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a16e2d49518164031570dbdbfd034fa2833e470b4f097c08b1ae2db207571e5. 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/QZPYN2382734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c62afca8b5c93dbf60e37a6fbd0755eea255aa2e2540869630746eceada40d. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:32:17Z), 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/QZW9K2388457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf411e67cf0729966400ef8b7d2cc40e4cf85fde1da6db912ea3162fa56a74a5d. 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/QZW9M2361475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc077cab9eab911c03d2db2413385daef4c9280e4ea5029baa4a58b8b28ea7a8. Chain 2 (Bitcoin): anchored in block 957846 (2026-07-13T10:25:43Z), 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/QZPYN2461301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77791306675b85079ef705133b8825bec95defb92df83484e36b65a33d5de099. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZPYN2462102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8cbfd19edcf76ff91f4ac00defb33a533e0983818a93aa1301f6efd56917d0d. 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/QZNJV2487807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3108941b3ec413ef17fa3bed92951410684184b0bc85850ddab8d68dd09bd77. 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/QZNJY2415752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e1ad3f9552e07e0ba75ede2408c1e8dc2e8bb1a2338bd3ace83ab125ed67b7. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZNJZ2428761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417ae1e9c2513ef4df3cfb6370d966c12878f900b3a78825a420c69d20b52b95. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZNJZ2428762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52ebaecb4b4750902d35f09ac14385645dc7db060b5e188d3a0ea264b2e3479. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZNJZ2428764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6040e9ed784ba2ed9638ba269a684a617572d7c04e9ad531c6f373c859126a2e. 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/GXFHP2410629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281d9b24303b638d25ea9e8515a96377d643296f4968b80d41bb66cbb2fc1e07. 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/GXFHP2481166.
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 0x4331d944507f3a05500b0e794b78014e0fc0c1fb5a351c7df544f75fa0ae8e37. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/US7VG2565829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b7c43d443249088778c05c8cc68fad05f7ae9745e56e1095958e3d727c13b1. 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/US7VG2565833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc820c36013d84cdd781ed451d763612dde339fffa72e44d8e033a3d83f1629e0. 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/US7VG2565834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6187c11d6d544d20c5effaa620b21c3770713a22af787dfb1e747f814382c5f3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US7VG2565835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815ff07824a9cdbc8633e4557e57eb19c60c71c07dfc9beb2c3c82e7b97320d0. 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/US7VG2565831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f98fbb05f80d5c2fe8688b1a553ed953b3a793f18f5b283580e12c6895cf4b. 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/US7VG2565836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0346b1892cfce9e82c09de563f0bb792ade2e399dce08458583495604a5d08. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/US7VG2565837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066a5e1eb0e187043ac74a867b32ecdb663ce3e89b756b79e4d524cfffc309ab. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZGLS2561893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d0ead5f2f5c1afd96685b4e118ec2979d6d6b321951ccbc47d10f5e2765ea7. 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/QZMZ92560013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc0a0c9007f882354f8f9929e3b6ff6e2b1b15f2e9f480e3ba02ddf5ee129b0. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/NL8RL2556824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd659adee23c82c5d8b2461cbccb03d2dc493d0499c2ae2797496ba0ab050b2e7. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/NL8RL2555427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f9ca73b6e63fb583123dc8b19e991f28f0d8e902b47bf1be2244286f7452ee. 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/USRC12302555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82823a41b5924bae63245292ab78a4f425298de1f42dcaedc3d734acaaee8bf. 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/QZGLM2406195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6df9815fe78910889ace7edd00ef060093b3d522336b350403b5f3a9ac4e2d. 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/QMFMG2334165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c834a9faf760e77df8865d17d31a730911c301d7ae9e58017b52b65ab21e0f6. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/QM4TX2488689.