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 0xa8d7c2410f771d5d13d0d7e16997d303fd3a0593225d2da73a5000efc7b60ffb. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/337484d2-f63e-4e12-92fd-8ee38e47e128.json and https://artists.proofprofile.net/proofs/artist/337484d2-f63e-4e12-92fd-8ee38e47e128.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 0x2b88d579e139268bdf6eff4c105756c372f8358c1b3aebd53d8a9b6bd1bce6cd. 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/GX4R52434643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ffe00fa14a094c1f451299517f92a19798fa5bf1e5b51f0c2a95111874f0dc. 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/GX4R52494601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1539c58d626f4b8264e4e76a2dc734287e636a1d3fdf1bcee2dab1a4585d157. 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/GX4R52478522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d289bc8411746ea87073cc758292a5c349a6e9d9145138903fa7612128d1930. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GX4R52477571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d13525d018bf33c77c7701af0b2261de8b382e991ba9964cee0f19219d544d8. 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/GX4R52481723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be95f5bc8827d2d2cab0fb55d24079cc56db56f8daacb23e1bf886d029c9225. 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/GX4R52449378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6d80f8d909e39f2021e01cb1f555be7d448899288745876bcd0729cade7149. 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/GX4R52427254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96270c84b535ae3134919892e8963f6752be46354d1427c2ebd0bba0bcc3e6de. 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/GX4R52443095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64337edb931a9fc8b05ffbd035200736f825d4bda976737cedee50f91b6a54f6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GX4R52492623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc0f1514ebd49ea5869e31f4befaec5215cf2e8035422d1b63f37223f154856. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/GX4R52480219.
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 0xeddcf74b025bda2b7e7caf6657af32122ac96ea96569946b4f35318718c996fc. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GX4R52498779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ee137f4ea91836d9320480eeb30863e705e47e66cb1e3f8616bacf79106d6c. 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/GX4R52497482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da0eeb617851fbe9e29c242226a34f51efafa39b9166caa6bcb8601686ce958. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/GX4R52441925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c07a87d56ce9ab695ebb1515eb7c82eddfa9214cf647f001d5d191c237dd4ee. 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/GX4R52438036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3de96299f54f5f518352d470d03b3a314ee41a5f43152cdb68c30e82a429241. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/GX4R52472744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55415235a48ee689e26eab1f83a6d73aa097de617d477ff328e9cb3e7f8b19ac. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/GX4R52460602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a3d93553127a757378a865f00c82ecf3468a4d44b868641fceea11b28787f4. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/GX4R52461266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b0acc434eedf1553d07f4b26f7a3655955d532f51f040261307c45a68bcbe4. 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/GX4R52443130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34daa5437b9423bc8b314f407ccef45cf1c6f2df2c1cf24ae207f076b74f51e. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GX4R52435050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16622627783a370d474c15f59414f50a3c05d2fd45529a0d18ffac97f785e3da. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/GX4R52466788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcceb20951e4174da75f2a204cd84c82a3ff4805dba732814d5921bc92721f2e3. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/GX5MX2445288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda71e189042a1f62b31e1d230805abf62fdb22d43c69686394f56632b6f28139. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GX4R52467335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab66ca8f0105d854dcb08b1c746a7dab85fc633f7b197ae1e81996d91c65ce0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GX8LE2448243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264627a749a9e640f53586da8efc3ae24d637c1e7cd6ae7b0449d3205b9772fb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GX8LD2437711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc2a35d5bb8ba48ac9fd75c0bd69e7b57c51ef6146a794365ea4be8efd91f93. 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/GX89G2410286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e044240ebec8f4a9426e5c4714f672536ec15a2608e7ddf2d571e39bd50de9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GXBDT2382281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585590e331915b488bd75d2d5bc593760515a698c8485e925714e71cbaab2237. 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/GX5MX2391227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7df1ba4ceec54d630ae8744bc9f5a44c0b73e98660e33d7823a999df48b686b. 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/GX38U2391105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797cf1200cfde48858064f5816ffdd26609c5ac255308d3623226e9b10b495ac. 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/GX38U2387005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71bddb5fc295362cbbdb04fd813de2947f22f617d81437c341bf7338e0407f6. 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/GX38U2354910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc918b26040d2e23bb4f835ce7f4905bc219078c473ff7f0fe73a50f297f5a1. 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/GX8KD2301705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd231b64c2eba8e316697b31057d182e655cc6c7a44fac147d90f1261bc4383. 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/GX8LE2225094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0c0fcb757511c7c9a364482403d02376b6f7e5828aad29154a159e8a9e4023. 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/GX89G2271254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa688e89fd1406b937f1c5112e9ad8138b544a263adf8c11b4434b2641815a3c2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GX4R52286843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc718c42f364b17dea686978ed3085c625392e0414f50283632be134e3d6118da. 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/GX4R52219574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728e2d797d43f2604f741234eb17d8bd9a20c539c3a213f2495498b58cc726b0. 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/GX3HH2242713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98e5dc4a91dcf3f7ae862f58d3c5eddb32699d782f4e606fead21a3a4e95044. 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/GX38U2233245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22ab7d4f946350e424d66d853f7ad59b3dcf7939caeea008b65d80781a3fa71. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GX5MX2151050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fbe5de2c14b873169e6efc3c11b13462741ec31c020db5d329e72c872548ab8. 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/GX38U2144078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0fac4651bb766cd602cabde79ff6c37935917e0b6338dfbe2b3757c713ff13. Chain 2 (Bitcoin): anchored in block 960384 (2026-07-31T09:54:03Z), 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/GX38U2144079.