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 0xc64fe7581a96b9073747c0a82219c39de9d3b5d813f61aece3570d774ea2ac24. 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/837c9ef9-dc56-4e0a-a1b2-3a6c4ac4774d.json and https://artists.proofprofile.net/proofs/artist/837c9ef9-dc56-4e0a-a1b2-3a6c4ac4774d.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 0x669177588244d87edd4e9b4884fdecc4c8f69dff09c04c78f2418474dd31ae4c. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/MXF144800042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff73b7fba6efbecd18dc4fae9e4c0a32a64f7b917c3a4f7989223c26847786fe. 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/MXF144800038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefef743ef3cea4f9b3bc960bb8a646f6c41e17a0d3f2731bd66ae85c4ee5fc1d. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/MXF144800067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec503ea48b7ad8d5120eac765d51ed33279636c1b4f3aa7735a3b2ef6ac6e0b. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:06:30Z), 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/MXF144800071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfa15c61c7e122c5b755060c42dee3a717bdf22de0b202552395a4ac228e619. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:01:28Z), 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/MXF144800073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ee779e0c5bde85ba2bb97a554c17bf5a2833edafc2c9e3a77779b9cc863000. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/MXF144700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdabb2d1179e6b15f01cb9c142f1ee0cfa062798853cc7235d9376ec16388f3e9. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:45:30Z), 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/MXF144800084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c97fbd814b32df2219a5bdc46910f5a0e42c77c89684b1546fde67a491c7358. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/MXF144900079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5fbc3933d9570b8fdb38ca77a6713cdecd47f9dd4525c30bf71615c1f4382bb. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:37:28Z), 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/MXF144800068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52513ba4b1460e0f6d77fee3d7931cecbe2c2653caa55152c88603c8496004d5. 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/MXF144800085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5fbc3933d9570b8fdb38ca77a6713cdecd47f9dd4525c30bf71615c1f4382bb. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/MXF144800068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eea0c9a4d04ad2b6224d99f3fd855c193574e63c83985322cdf0076d334c92e. 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/MXF144800040.
La Gran Coleccion Del 60 Aniversario CBS - Tin Tan Y Su Carnal Marcelo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fba734a387f113b284cb01f62d004bf9c85ec1854b6bd446a06f6349603eb00. 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/MXF144800025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063eb60644ca36e26a49434dfd8c713bac4dc7ccd6d288a3189cdfe6f14823e8. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:51:18Z), 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/MXF144800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b13874b8a35dc81c20b34161c1f4eef6f59b3e5ff42fc8f2b0a83cc7cb0494b. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/MXF014900051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6186f175299e045d4bc70ebd49f3c3d34c8589e9ce306e735837bfff58d217a0. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZDQH2012501.