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 0xe75188510e989f3d25e7b3bf22a37548eadc413cb4a9df4934c6b5c1859f67fc. 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/25862abb-299c-4d1b-8b95-c5cde2077635.json and https://artists.proofprofile.net/proofs/artist/25862abb-299c-4d1b-8b95-c5cde2077635.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 0x9778440e55495368319d76227e7c1bfacf5d0b00e7f48ac3ecb647364752c660. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:50:57Z), 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/ES71G2227617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f66740500be471d468e4275e2b6e616207c1dbfae729033735a382303ae2578. 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/ES71G2227618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37bf946b718ebf558c0762d3d047f784ac0c5523263a56e03d072d66872d9fdb. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/ES71G2227626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38523e895b632eef368404820340e898d087634ee8f2b6e274266a78614b115a. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:28:20Z), 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/ES71G2225394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd3454704596affb1a69163ffe2e72ca8473ced51fb72c7c4f3ea5fa2f72240. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/ES71G2225396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd5824c83b134684e5c6fd6304c25d20f8e2596989ac16590d8050d5930d94f. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/ES71G2225395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8f4bc313b5e9aba3e79706081af168260c265a6e97534f8b640ad9ea44074b. 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/ES71G2225403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7612ef54c748c25b2ffa366e0abd4a9c4f7f88a0471202dda28e9d8595670bf6. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/ES71G2144436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8096b1a49cbc78625f82a45fa71a9c08a21d1a4d15e16b3f4da12044e0dc61d. 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/ES71G2144439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1596f73135af4b1955229af48175663b39efc0175a587364ad921e300bdbfda7. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/ES71G2414434.
Lo Mejor del Sello Ollanta, Vol. 1: Cumbias
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141bfe3dbcd7b7af54e02a3b10e632dba1b701ab3cf0909aac9733b69f3f2576. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM4TX2476884.