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 0xee0311e610889f22eae7288dc43517877c9f9b19dc563f1d17e78582f965b506. 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/dfbfc3e7-9c88-47df-95a4-deade07f9e83.json and https://artists.proofprofile.net/proofs/artist/dfbfc3e7-9c88-47df-95a4-deade07f9e83.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 0x9ec532bb05ab282da8690db583274d5dcf0da6f689195721ad5d1b256fcf4af4. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/US25L0700948.
When the Righteous Prosper (Shouts of Joy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15363ffd728154ff39c647d2f22e2acdca179654e81584034766828b1d418b23. 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/US25L0700949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb892b0af38075f76bba44dec361b3dca01b0678189aa6efefe30ca7c64fd7f09. 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/US25L0700951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b158430c9ea0d3f82a9d8c1329bd4e59afd6c478f92a7b116a5d4d890c527fe. 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/US25L0700952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27459d75d51dc5f8c077de21d782b1ad49fc7c11a96f3380c1c8cb7ed9420098. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/US25L0700955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536fbab250e438f3171886944c06a9f697152d8f8f281879d98639191d216d55. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/US25L0700945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd5c5a0ca5813ae0e06c745bf1c10e2db5e1fc3d91e5550651ea0d9079fc534. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/US25L0700946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb998abc8e042f2c626aec18c0cdec691a4a63c6fee293d8c69404980c5eeefd0. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/US25L0700947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec532bb05ab282da8690db583274d5dcf0da6f689195721ad5d1b256fcf4af4. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/US25L0700948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15363ffd728154ff39c647d2f22e2acdca179654e81584034766828b1d418b23. 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/US25L0700949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c2b1eebaa1747e513cfa4df0440c2a02622ee55505f375bb9b9a2e820c61b4. 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/US25L0700950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb892b0af38075f76bba44dec361b3dca01b0678189aa6efefe30ca7c64fd7f09. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/US25L0700951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b158430c9ea0d3f82a9d8c1329bd4e59afd6c478f92a7b116a5d4d890c527fe. 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/US25L0700952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62f2af4d68b386a7000236cbac93e4d083791f12b0bca8fb25e9b1bea791c90. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/US25L0700953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b50cb6f2d968f78616bde6e3d08fa768b1e1bc783cd9abeeebdc00953b8ad84. 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/US25L0700954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27459d75d51dc5f8c077de21d782b1ad49fc7c11a96f3380c1c8cb7ed9420098. Chain 2 (Bitcoin): anchored in block 960177 (2026-07-30T00:21:01Z), 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/US25L0700955.