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 0x7ddb605395263d2ebf3609d284de758ccfaf8a37e0cae596cedaf0cd039c407b. 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/fdbd31fb-2001-4323-b93a-2329ce4a9a3d.json and https://artists.proofprofile.net/proofs/artist/fdbd31fb-2001-4323-b93a-2329ce4a9a3d.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 0x23319c8046970a65e98c3311ab661fbb12cc87abd4e74f01cf61c7b53a458ec8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR96X1694845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a478c5d2193f8703e305a3bb6a44a10014cd52924608add8d6bb10e1e63cdfc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FRX201619534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98287611735b5106423690313d285103d0048749a359c5460412f6757157e235. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR59R1742373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c3e533db888a0f8f1db1d6536e32e4b95dc57b152737f6de788bab09d14c92. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T11:00:01Z), 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/FR6Q11900061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa512e46d4026acc4723d6767bc64e6bc83c88756c9ca1afa0be97642400e65cb. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:04:33Z), 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/FR6Q11900068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53132f77614cc19c4d9b60ff3183cb37811a243279f9b424c7774c2294257c3d. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:02:29Z), 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/FR6Q11900070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e70ee786cd54c2ffd83c4fe3798c584414455201ec04ed1a08abea1ec383001. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/FRX851801533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb37650b90a5f274ab15132211c272bbf6b5ca052c604f48ee333c2a128aeb4b. 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/FR6Q11900121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c1853d76451a3e3fe9ba0fa018dba96a9f6c72944713e04052b0e1f11c1c08. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/TCAFI2011987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b4f9f52180b6727279a0e6e2caf4216ce63799bf66a1990a24565ddd8243ee. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:49:30Z), 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/TCAFI2012238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492246d593181e3986e619071dec148b325abb1b95334315ec9bb1273a1519a7. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:28:14Z), 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/FRX851901942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c6f67980876790579fc39c9304a7ad5e4b1de0cd9346be3086b10173377596. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FR6Q11700025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3153e396a2aa22e2d62c78ba3fa6ea9b39aa8cd1c3edd543bc395b3c0812d52b. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FR6Q11700073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3153e396a2aa22e2d62c78ba3fa6ea9b39aa8cd1c3edd543bc395b3c0812d52b. 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/FR6Q11700073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8aee5696dc3da6a80c4cdb8b4f8442820c580fc610578bfe63b052ec5e9ba1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR6Q11800095.