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 0xa99293f543f1f25507e94d330ba56e10051f521114b72f4c107fd1d9232b30ad. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8fb1ce27-b9e9-4971-9b13-384e71d61098.json and https://artists.proofprofile.net/proofs/artist/8fb1ce27-b9e9-4971-9b13-384e71d61098.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 0x0ef30ff42492b10435b8c5487cbc7c6359dd87d68c8d9023adcc771b3216b508. 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/BX8AE1900273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689d7bcc5f6aa356afb7dfb48c57d59aa02a018bc79f0fd7dad876756346b362. 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/BX8AE1900275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87dd9daf6c499981f382b42190183504421e6c4b157c4ec06cc09176fdd77d55. 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/BX8AE1900280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f482d645806b1c56c9572814366478df84e4c153545ca7d77ba7c665c0c870. 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/BX8AE1900281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f1fe4a63f6db403f9a7654ccb1d0d4f5349e7ebf016a00c2bc0d6b4b00f761. 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/BX8AE1900282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827839d5be9f26ea9aa46319375f508dd78e0ae326eb3ab19cb0c2df638c2506. 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/BX8AE1900288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37956dcffbd86660deb386e57eb54924bf7d4b03a5cac71db688ed3f889fca8e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BX8AE1900289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c015bfc76f3607310697c3781e8e3d01c3f6ab7750f719368fa5058b453c0f6. 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/BX8AE1900290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5a89037e6a5d690564f3353efcf5e95d233dab34658f554978066a670fae80. 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/BX8AE1900292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43fdd78f5eb4e4ca73aa9b9f23a85ff0aa73e14d4f3cc80b8a1c9442291a8c4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BX8AE1900293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872be4f7e17379556170ec339ad25ffcdb4a39af092cb33c1d5ede4d0f55a5b3. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/BX8AE1900274.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10217f9ba76461aabb78fc4236d47646587a3042ae08d9a8df9beb1d2bf83408. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/BX8AE1900276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c18d32b0ecc1a78dd0151ccca0f2350c19e0a6d82fbea81f01b635eb399ba6. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/BX8AE1900277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a993a67edd77b377c3ac4ccfd1da8682f8ae3588026ed8a62b5660f5575dd63. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QM6P41922434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ea06f973796f365870b4b3266cda5f48c354abc0f521e9b088e98823f8de7e. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/BX8AE1900279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c13dd4a5ccfaa749899516d52152fc0403572935ce408e693aa1c0fb8117a7c. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BX8AE1900283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa290c38a1dca19d13510c9a2b852c1fb332a04516c31046965ce69fc9250fa19. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/BX8AE1900284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905cb874d06aabc2c61200803bd2c56d9db2fd0f0e25571ca37a0e4e9f0dce46. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BX8AE1900285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32aa2b6561339fe02bd26aff8473656a21e3b17faf5dcde9c32f330df33da28. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/BX8AE1900286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0fcb4d78bdbcc3b7fc9db8d1069b4b3a3c8903b02d1ae24f131295f997723d0. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/BX8AE1900287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7408f83b09000301c0a2e89e52772f71ecc9420e7b30e4b1826ae4530ca2f40c. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/BX8AE1900291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2a4fe24881f518c139411f24166dbdc080f12dc5e2bbad6c40306af99fd8ef. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/BX8AE1900294.