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 0x14e283e73f7cb3a1ec4557fa9da5c6e0a69a2699ccd6a5dee6c66bc417d3845f. 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/1a5ddc1c-a379-4d76-a5c0-b386f470560e.json and https://artists.proofprofile.net/proofs/artist/1a5ddc1c-a379-4d76-a5c0-b386f470560e.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 0x5530f97e8059e1723ac9d6232b60cb55785d1154f17ea0a1c9149b77d5d41f45. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBLMS0710095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35ad0fed0506fd25d3e879e6cab1e60618b3883a2bbbe8ab8456417b815a742. 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/GBLMS0710105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9bd0c0c51c5965a2089773eeb7206ab7e9d91347d97243f77014358848848f7. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBMJG1306780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf016a60e554de1ffac98b458e3dee4ab87659564588dc1bb5f6152fd06835bc1. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/GBMJG1306781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0802d3687a0701d18cc12e2b8dfd5412fe1a08d62b2c51c9a9e2c8010a017dd. 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/GBMJG1306782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b6db5b941300812e7581dfeb78d40dcd5073df781c3367a48baade3540577a. 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/UK4YZ2000032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43c813dbc604603a44b8c36d92b91e5f025180bee1176634483529ec47a81d0. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/UK4YZ2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f764db1167670bad796cb82daf7ee01058eade3fbd85db65bf65722626734d. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:34:28Z), 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/UK4YZ2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba1438d5c298b187d70038e01bf439b6bc44cee46d2abff56522ad2f0e4ab8a. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:58:07Z), 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/UK4YZ2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5934cfa24c12f824206428f907e737f175a9ee899b5e557463f25749551ecc. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:51:39Z), 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/UK4YZ2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11a7dc8651559feeca436f1c8c01b8e4cc653c5a0cda721900b86a4c6adfd58. 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/UK4YZ2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d5fc0254eefc14faa66d123b5c19ef621e58afaa7de62054f2536b19ad14a7. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:50:16Z), 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/UK4YZ2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442bb865b8b7e36a630eb6e56aaa7837360b4e095156c6d136336bc2cb8b24c2. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/UK4YZ2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14cbd3baaa04377e1c7fcbfe5f09bb9b23a423830ca94c9b8f68f05591a9cf44. 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/UK4YZ2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf383ebe6f35682a758f44a2287dffc56fe8912125a000af098a0cf16588875ba. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:09:08Z), 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/UK4YZ2400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f0d2e02746944f0cfdd0ef247f3ff05122cf7a394012214c448d875e5baae4. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/UK4YZ2400048.