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 0x039e28c1204f381973948b8af56ae809a28a090e76d81e4b355cb6bc6d76dbae. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5899d4d0-ce73-4949-abd8-98f30adb9592.json and https://artists.proofprofile.net/proofs/artist/5899d4d0-ce73-4949-abd8-98f30adb9592.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 0xf1fff37c8d89d379f82ad14c2d1d2e81675433fcf9f83e8e36ce16e649577f48. 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/TCAED1972619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c963f864eb89efa2652de12cacf6fb8927ae01e9f35e5ae0ce5e07d8e91573. 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/FR59R2139124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f7e276bd2112ee575216cc7c020d87d349e872b2f925dca1c25b492b3f118f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FRX452182115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36bb0f32eaf47d32c7c5aa55da861cb9038dd7f48f65221b7cf36612ea857a51. 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/FRX872165591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ec536b6c4dfaae7d4e07cdbc2de104310ae3515c66a410a41afbea164c2b22. 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/FRX872166953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd025d0e7d9fd299a2db1c16cb1796ef194176e2bce54f1008827d807f0e2b9a6. 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/FRX872166955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cce64ff933073357b2a584cb82095652bf4305e4c65f3a23ffc8d764c80b37f. 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/FRX872166956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0de77756f4cabedbf718775061f972a4cd5f780d4713e4e02edbeffe12f8c58. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/FRX872166952.
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 0xb338e992cf16e66557b0eced1f57202a7e4fb2777c4ddcb3a416bbf7051910bc. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/FRX872166954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1532cb7b76eaca6708fe280b7f10b6c5aeb5c529001257ee30ee73bbfccd1bf5. 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/FRX872166957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5545ce0884262ce8b223b70a234fa6f348913009641ab3116cb7df227234eb. 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/FRX872166958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5e5e218fe8ce2db7996164b42d5cd457c300e85a224da2989f279c545b151e. 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/FRX872166959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a09ce88c6eeb43d7bb276d8f4438d6702c4235eeda33a274897687daacc5b4a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRX872166960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6ec7b0c2c74bd3ac4e3b523ab68c654b687fd1d22e03529b3d2ba219c89093. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DGA052301674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c6171c362de663b1fc184ee8ec980a7483f76f85ef07eb4f4c46b41d213d21. 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/DGA0Q2344836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf62ef93493c7141ab863d26bd937db5c621af1a5468eee324b786af2f3905f. 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/GBLLT2401578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9ea513bfad8a947de4a88eadeb90ed1bb557f471d05b07266c2b6ec12531d1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:30:19Z), 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/GBLLT2407151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03a3fd0f393ce302a7c857bd341cfdf71def14a9e66b7d4f6f26c6d9da03cb9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:10:22Z), 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/FRX872464174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43171ce45f2184e3efbe9865cd407b9377e4b2dc47b5dffea66700a3ff3ed603. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/FRX452597813.