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 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 0x1dd2e4f366e097c1da3c5389ac9f597f988b6c0c6e0b4f695e9bacec10eb5db2. 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/723b4a00-f7a1-4255-8bbc-b5209596974a.json and https://artists.proofprofile.net/proofs/artist/723b4a00-f7a1-4255-8bbc-b5209596974a.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 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 0xf588b63eef6bdb8048bbb188bb7f023d36fc95f7b71d9c07bb9dbb71c523ff49. 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/KRMIM2113266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb58d216e29b359e397f178e22a6ebdabef373f23c97e7bf984e926524ba1667. 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/KRMIM2113267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e80f46c3d87eb021964e66ab92754fa9680685cb511d205229027e52056c82. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/KRMIM2113268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4076a69a15abab4a0ac9dd094f61666fb2a44b8ee5df0a4fcf4814cd6bee97c. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/KRMIM2113269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5106a26747ff3dd36575cd2a5992419a757df016354ef680c2e5df97327e1e77. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/KRMIM2113270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65acf5ce0cec9d5193c4697ab2e6e7b8d1b4f16daa2c84e5260553f9368b8ffb. 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/KRMIM2135104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7277b94903ca5a1137967f091cd6f4c2cc58aa6b4965fdc37ab8ca752e9779. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/KRMIM2135105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d3b6dd831f7bbe5dee36728578dd4457e37b00c6a5944e15624ab8db27a682. 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/KRMIM2207058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83e5f807f3d3d2910c0a5a276fd9cc7ba8233c2ca162edf999098e5666291c3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NZAM02200596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a29ecc268340f355a268817882967927e18b49e5acc9f7052b4decd776f8ab. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/NZAM02200597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13bdb2076569e39a47e8fe1593dea3e1d33620714d658c1b50170c7d3276d073. 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/NZAM02200598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb234b323bc24c68193c77abfb8ee0baf0728fc519b904e8a2c571ecee9c4aff. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/NZAM02200599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f6e72ea4f8d93e3db51bebe84c89a596673da5a98d397e00484bb93ce08585. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QM6P42225353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5284b99a7f0cc28fa16e5c6b847c6f8e59eab8596f08b60a9f4560e70fd57ac. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QM4TW2387297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6741cadff550774bdf49a7c7b1ddd521bd014abf09d9b16519923ef583f5679. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM4TW2387299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27196ce107e742ae9ceef6c66b794cfbe03816ed5d9d45d791f1c60d73722687. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QM4TW2387300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b65c6932b378833ce39808021bacb1a182f7e0d5a90b906684f18118e0afe79. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QM6MZ2455510.