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 0x835caa42ecf3618515d22cd1491c71bd34f33916a6c0a008504e36af12cc4ca6. 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/5e151296-eff5-4eb3-a3cb-4883524887f8.json and https://artists.proofprofile.net/proofs/artist/5e151296-eff5-4eb3-a3cb-4883524887f8.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 0xac9154ef8a98abb5a089c885cdb34c035baac9c3e1103087846b6b1f3860a456. 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/CH6541857539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8e55ff68367ad856f2fd3f620acdcd4a4ded4b6db5b8b7350fd02d9749726c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ESA011822673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a410486447332acff6d1c983c752dc0283e58a6ac1f6a3fb027f099b9b6226d. 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/CH6541847366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde18f7f3ad52124cfdd677ac19cef2729c1a8c8d83bffa9ef859b2510c5e29ff. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CH6541847368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a595ee39ae28ab104886bc1abf7cdadc1c3f9764b79fe37597d82809f84311. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/CH6541847369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493d8f16a9641e8c3e0c47a108b0916ea8e0cf9f241b70b78f0d5f4398480ff4. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:10:58Z), 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/CH6541842579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2ecfdd1dcde2b790951e9ad05c351de253a01336bfbe960f4beb24ed03189f. 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/QZ5FN1993032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7502836fee9db76960eff308c2ac86e7f0b4e617f95808ef72c20101dbf4f966. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:07:27Z), 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/USLZJ1958029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63744ccbb86a77e7fca9c8321aec859652cd71c27ee2b7b94bf2834480b8c83. 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/GBWUL1915242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd998c60c764b2c009ad6bb239ecc81916caa4fc393a14dcc8feb69579d1531f4. 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/ES71G2119469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdac25e8a4078809f0556b578b7e6ed628bd19d85cc76809a534a299677c1d1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/MXF152100251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0626ff8e59627260cd3bfa6fb82c67d2b6f085937170389f4322a3af34b2846e. 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/ES71G2241162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263e110f4c791fe1fa9e2cea201843c22eae79f05a8384a291313ce54bbe8133. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T19:02:27Z), 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/ES71G2323993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f46ffed5d55e0160119436d78e65c80309429dda8169826551cd94a23a445f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:44:25Z), 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/ES71G2329256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc383a69ed96ac1ab2caeb3de0bafd61e0a8e11120ff79bc5c060d487cdc3ee31. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ES71G2042215.