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 0xc93affff6ca6284fe5ad49bfd2da607ecb5f8dd237afc3cd5f129f51af125682. 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/dde7d559-31a8-4d64-9df9-4f71f8836cf4.json and https://artists.proofprofile.net/proofs/artist/dde7d559-31a8-4d64-9df9-4f71f8836cf4.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 0x456fcb9801b4ed52dd492f4fe59ace68dcb1fe209536f66ef9cdebcfe227faf5. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:39:30Z), 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/TWC150002004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab87b38fc569f1ac2189b5360947a08e021a6dbdb7f667ed4e52938a0807e151. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TWC150002006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc28375a3b455c17e0652fbb287fb0178199f9152bb30f0936ac93a06861701e. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TWC150101008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2584be8e03695adfd3fd2e7e2deea3ec0ed82f36090d3ba684bab8df8afcf5. 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/TWC150210002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4904f737e3ad869977dc0d265a0c7d4ef8d66098fe76b7294fd53241d3aaa1fc. 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/TWC150210005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5ea1d691c30eef2af241f48409785ba7f2005db5e82754fbfcc197a283b8ac. 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/TWC150210009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4afe327e3124862434a32342168f55131f782694f4f7f3a40bc8f41b0dd583d. 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/TWA542000388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5cf8d75c96e93f7c82e538597d671590fa740266f0036830215061a15c18835. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TWC150402004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b404ae1972554654a0fd9d291327dfc8f0a4be5fdcb84a78c3ca50ae66d53d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TWC150402007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11cc72eebccd79a1cf5ed48f4484e70d98d23eea838bfc945e36c4666b8aabff. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/TWC150402008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f680ec6dc39850d86b48a3185141ff8476354fa682e0e66d22b6aa8c553bab1. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:42:35Z), 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/TWC150402009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8118d4bead1251a67cf78805322fac562eeebb79f9ceeb5f790ffe5b6d00e865. 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/TWA270608003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109d5779696a5255265f8535de45a019c8272d67a43921b38c15a2b8c822017b. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:54:38Z), 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/TWA270608007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60de96dffa273fcf1ad5b8586a180ad2c170ed04ffc3ea1534035bdeebe06b9b. 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/TWA270608004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434a353a0700c65488dc8806a5f4ca82eb4c6d889afb6958925d2cae54dcc564. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TWC150103003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434a353a0700c65488dc8806a5f4ca82eb4c6d889afb6958925d2cae54dcc564. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TWC150103003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b437b164d37eff15d958eb81664f9d8904bc9982d3c80091181583e089cf366. 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/HKG732006051.