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 0x06c4c0508486fa31e834a53e9e6bc4a67c7ad5522ebfd2d03671ba10a7469ecd. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f9405a3-951a-4524-9334-e9fc7c05eecc.json and https://artists.proofprofile.net/proofs/artist/8f9405a3-951a-4524-9334-e9fc7c05eecc.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 0xea2103dc8da336c5f36e8d0563b292596eadf8f17b0257087fb36b28ba921719. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTPX2381985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f44091f536af784b858fb6e90a9ffc901ca33e00df370d926540795dc02435. 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/QZNJW2361596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276e360f33583d3a4a90a2268201ebd4702b64454cbbd9b3b195d6420a7273e8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZMZ92304963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43f069421ce20ccb5f824d2fd450594901d56d28d8ada9c2b9d7c8bf71a5fab. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZGLM2352398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636eafbd589d19193d170a700650ff0d926114fa02200d57f9b5ffacfe340c8a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTAW2241025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5891efcb3d7f823904e6ecc18daed903e568c1abe8f454d0575bad2561bc90e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHN42224256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f58a90cd97dbaf6977ed3c7a0eab25d6df78ff0be98bf28872e1d916136e2e7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZMEN2281538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2442b340c88eca6584096d9e9ae580402ab2ff91fc00ae8523c72961d8db52. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZNWY2272406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f58a90cd97dbaf6977ed3c7a0eab25d6df78ff0be98bf28872e1d916136e2e7. 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/QZMEN2281538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2718fdbffe258037b9e88af5f59b63e5f2c5fd509fd1fdefb0930135512d3654. 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/ES17D2201728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5891efcb3d7f823904e6ecc18daed903e568c1abe8f454d0575bad2561bc90e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZHN42224256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e77713abeeb8ac6a331b24b2836b64f7cf8cfa4eb67d18f7c7ea4b781cead63. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWX2127274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71accde656dc94fa498a5849c30280cf5076f09208f2ed0f46dbde2373d921f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZHN82113324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c39ae0b6e12d96063fcb4dd79bcd431631621ca8904a785ced43ffcb833f084. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHN62145935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc75b54fe7b7b2a6ee0acaf0addc3b0da9e05af696fd36f7f1dabe052e27c74. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/QZNWV2080607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86491c0abc9ad60200c39f71ba8b9632f1a26082844f486a70a182b60bc63901. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZDA42316390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642b1e9dc27c54c7bbf483028bc26d907089dd857fdf7c9603f1a6cc5a374267. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZDA42316391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d98f16857a09c53279497b2452fa998e949c2a88d1e2df0828b64a92432238. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZDA42316394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b3d92450571a802b35b670a9b6070fd751d176436c2398807131dd2244d850. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/QZDA42316395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab7234df7e8ce375d8c7d6685ae745b342dc8d1d2ea89ceca9830c3c52c5d22. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZDA42316397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cea0ebe77c89e97a2d3a8151fd4534a001c5601c24b25b2fd0ea29262fe0fc8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFZ32275593.