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 0xff77a8f46717f9770b00d5a0fab71c7924eede0b2d07439b46f11abf45ec5e6d. 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/bbee3fec-3330-4fa9-b0f6-5e08d4334a0a.json and https://artists.proofprofile.net/proofs/artist/bbee3fec-3330-4fa9-b0f6-5e08d4334a0a.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 0xc0c6a2a58cb1d054ea19bfe7173e3722b6a0081a809dbe39b30b0711e052d41b. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/MX2832145256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9a6e84bbf3c80fe4a956e45e19b9efea2bb84b6a88c73ac07101531fa66376. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/MX2832145261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582a3f76f69629b13169ef4aa564ffe44731432a497df11fe223c23df5a9d397. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:05:30Z), 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/MX2832145272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c3b1abf61b3c96d57d21e19abc3a354184de431556e2582b62b4309e5ba564. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/MX2832145221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d709ca6e03962ffdd1072b99ec48f27a6ad91e22d1896f661795b06137ae986. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/MX2832145222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f819a60ec92f7ae1f8613e1ea97a2250218d85f5b4db64baf7ce68027db0e1. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:19:47Z), 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/MX2832145227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c86ddc95245f616e5ede09afd8a874c22ac7aed92264d1cb503e5315cb6671c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/MX2832145230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8f431ea04ea2f988c3775a8feb8800ca2536bead38b2b54e60d5f432ef6edb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/MX2832145234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba1a6297d7ff0dc080bcb280caf215224a1e50e1869f766cdd1e89417299412. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/MX2832145242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84bbde822717f18f5144be1ad67b46a1f9e6f60bedec5e2382fed3b44a0134b. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/MX2832145244.