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 0xc6891f6754f2d1330f977d7cb3e9b8c7b3ddf74fded69862b7a2c0c16bc819be. 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/c4844b65-7cbc-4d1e-9d78-3e756c623d16.json and https://artists.proofprofile.net/proofs/artist/c4844b65-7cbc-4d1e-9d78-3e756c623d16.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Yangqin (A Journey To The Oriental Horizons)
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 0x1520f1ada7958444043faaade34b3938cad672183d9e3f95673d05f6a47975dc. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/GBSMU0010910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c33293caf894367ce9b043f9ca099848e1a7d8b53f58f31dc27696d4d652e57. 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/GBSMU0010911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d17ab6f11d7915f6c82a578621c24ee478d049cdc4141a915490b10bcbea3c4. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GBSMU0010912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0e67b002680e943c0c21de9987af08efaf12fc4a1ad36b8de38497c54cdd1a. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:19:56Z), 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/GBSMU0010915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6576b70f9bd7ea776a7d136a0b5d263be84f220c0fb565226760f73d4fbbbe43. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/GBSMU0010917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7331546372257bb1fcc9f7fdec24f4920c3bbd15cb60bca395ba0ac8a5d5b4c6. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/GBSMU0010918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94422c68b28bebaa6103d6d9ce79eb4e1bb566ec4b5262b6128f5c9fe34cfba0. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:56:29Z), 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/GBSMU0010892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a5c399354d5d1ebe395dda2a144e7b4ec4b26d96f0a26ff074eb0eea6574ef. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:09:14Z), 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/GBSMU0010893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea787459c3e568c7b02e4bdd4b9e628fbd727df3e2441d5c96ca57ed9b867344. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:38:40Z), 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/GBSMU0010895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6708a947ab990fc3cdf9829f9c1ced4de79a0cb52ffaa95fc8b8f443bb270bd3. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/GBSMU0010897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f213116c0ebb1ce7af0ab99693bfa33596c2fbbae4837c29178d733900bd2f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBSMU0010899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f7768421b747da163a98e42dbd87ef8c5e6ae07ee87dc0a66bcb2c27539f49. 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/GBSMU0010901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0884506e94bfb82e15e4a44950d12e76f53167e5e6fcc82a552adad03f567580. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/GBSMU0010902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc49da8cace8d684947173c531d969bb2aa17bc1c2945f1fe1110601e7e421cd. 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/GX3HH2273348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f295ddef13f86f688611db2d1229d42fe0ebea7c005484b84b157a97967ab73. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/GX3HH2273349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6721ee7089bb3de58557e787f1e307a520b029acc7c62172963fdecf58a84f07. 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/GX3HH2273350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44cb5b2f15be5deccf1f34ecb544485da764f18cde6026cea6650d9c8262456b. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T11:34:40Z), 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/GX3HH2273351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8896dea622f0c0e68be7d419c90a4222a072f4cc288ff608820b31b8a63abc89. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:54:34Z), 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/GX3HH2273353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79e99ed7de6b8c648977a14f4fc09913216a9aec84a1de01c1517f26a4ab2ff. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:42:16Z), 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/GX3HH2273356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29bc5e99c6999345c7307ec04bdb619631064e2db8aa7f619aa966ceba8c301c. 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/GX3HH2273357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e59d15976572072473bf84047aaf133c5b92294d5c45eb98815c16a4b0a7dd. 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/GX3HH2273358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70731b0e366e9b4e48ae0ae2d7b003931be76cd3e3f65dd80cb73780626504d. 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/GX3HH2273362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd86fa63e68cb6a80f4b1916e178f44dfac740f9bc2128888144e6e0f0f8631. 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/GX3HH2273366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e426484088d468b63c8bba015bb7ddc456ee0ac6040e4358acbef2e19e276f7. 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/GX3HH2273369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338fc9dcc0913c416833feea529fc4950b8145e0af0ca80286e87a799e40ec20. 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/GBSMU0117537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e0cb12a30fcf1b64d5244eb4c94400fb1db7a4077fd441603694c69e5c4b5c. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/GBSMU0117548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf038a20f61c1e4b7c4b1683c7e7a2389fe8bd74adc28579b89f943cee68cbd1c. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:41:20Z), 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/GX8LD2310332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf640036d4dfce1c1e3d88f1ef6132b2af48f51edbaeeb233f2c6b4549a1505a. 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/GX8LD2365998.