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 0xd3c3837b0338200d7680dabc1d64f2e30a605b7410a3ed2d66a839afa15590cd. 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/05776b4f-c143-4840-a0e3-e20b9013075c.json and https://artists.proofprofile.net/proofs/artist/05776b4f-c143-4840-a0e3-e20b9013075c.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 0x3bf6cac7240f4734dcd9b41f8cf1de0bcc55554b273fc1b5a7c8cc86dea3be5f. 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/ATR981245512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a3901ef0902a041c827ec2b139dd1ce8c2ea8cecf450a534073fe838ae8e3c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ATR981245491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c70aab46422bb69f5a720306d86e2fdb42acfbf4b8a7e306cba36223b288a6. 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/ATR981247705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaedc9b1eb4afda4b2df30e8b95f523a5fb9dee9feae16aa73c09f320e42aeb0. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/ATR981241722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4db85b477ab781db9d063d85480600734d9a4a9bf1aaadee7da4ff5b22c92a. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/ATR981268520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9844ab18777e60ba471b8c655348c40ebd95c68c72406c3f6bab00232f2e584. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/ATR981291454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1e60187ed1e90e910a4b26eee4345e6165c5c8ec12115f0df4688d6e73f73d. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/ATR981291455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed9995b87cb5b57a42771d4cefd8757a105a626b0bdf92b69ec3d0eae001bc8. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/ATR981291456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9267ce2a7bc9c537e24c7f790d9616e8458cbfc1b82377726c6aa67bfc2e3b21. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ATR981291459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1611a3d96ac17e5ea756b43a01b6ee35bc85ac6583fcd2b7ad87e0890f9a09. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/ATR981295079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c97537a76c35c7197f31387075f9986178149844d0fff62b3d84926b1297457. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/ATR981296133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2344e3281eb34ca85ff0ba338488d2dc2c4d104697eb4a7ca104ec153616e1. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/ATR981312466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dda230330c2a381de4731d20b064af4d2ac09a5bbb4d43461196d397a0a7971. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/ATR981312467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d9c9675e34733423f3cdd1e77e938028591b74aeb3cf5b3377d78bd5657a9b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ATR981313756.