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 0x7c234f6c83ff89af551a09ca8ac02051fa73951392a9b370a7c71405898fc47e. 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/3ef11834-7694-4c6e-8051-cf91dd5aecf1.json and https://artists.proofprofile.net/proofs/artist/3ef11834-7694-4c6e-8051-cf91dd5aecf1.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 0x2852ba1596517b184a86c70c4b94a9b33b0c17f61cfb2791319b424d445c0e23. 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/TCABZ1416565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34956558afed5e9a4a807b3ac42ab21d73fabbee861c1b0b37bde0ed06191d66. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCABZ1416570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d9695d31b7c73ff749a9261bf8c0ab76f3779ace3018208b243650f8ad152e. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:08:01Z), 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/TCABZ1416575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6567a7e1f04aad73a64159f7c8c1eaf6f78b0a2a8e59ab7249643f9c176f1d20. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCABZ1416581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11c538e8e88b13a96236bcf5bf0ce4e93a9bafd4e778f2fe4844ce1f0eda53b. 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/TCABZ1416583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33640b0911bb4ed51269a5028d88ab77933a77ecbc6a32f24864c5c14e5c4f02. 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/TCABK1267845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0975a031b7d73589385fda937da9e516cee67697cbf71b8a897b6c194ac487b. 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/TCABK1267868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729cfbf216f05c92473453e2274077c395f88e2c294ab6429c82965ec1dfbf0f. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCABK1267872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5960177caa885a297fe402f6cf6f4b112372c73e3bc5e7ad1c16b0c2a4d3009. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/TCABK1267873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedfe35432b56e03101e9164f0e7cf0879287971a6dabd8a6333c7fe06224334e. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCADG1785229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3462c89edb4f0c5adfa002a9c7c7a39a8b14b39972daa60fa704cacf9d1e9900. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/TCADG1785237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2ed5408174a65abaeed9709980cdf0c8af08ec14bbf1ef2d9d5ad3fb1baf33. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAFF2029816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3cc467edcbc28218fdd9c9154d216f297f6c893c6c1d50dc55b8fc903f8f8aa. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/TCAFF2029829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f7e36999fc85846cb1d66d9dbca502522e94879e2888bf34bee7bdc4e92450. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/TCAFF2029838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb6ef50a239e43eef4f87161c70bd8bc5e4a446cb8e41e7a22655ed891888c1. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAFF2029982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127b8030bde593ccd58275932c7ec3433a61e3b7618e15f7692d3c274437b447. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAFS2150439.