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 0xbbebd472b9091ee353bc82292dd7d34841dc377e97928534152fe41cf670aa8a. 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/03ba1496-2f47-4d3d-b772-bb14e0d5bfa1.json and https://artists.proofprofile.net/proofs/artist/03ba1496-2f47-4d3d-b772-bb14e0d5bfa1.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 0x0350dbb4ea3b84023d7493990cd1abf95d0f2f779c64f9c07256a84754fc32a0. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:04:27Z), 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/BXWCK2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2759ec6e89f3badb263e27a8eefc89e34c3f46216c9490eea52731fcce8762. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXKG22302108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc757a93352b019e9470fb1ce0925c78207cce908eba3d887244de79f8e67ed. 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/QZGLM2478158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4267abef2a1ec59054a4333fd3d080607162bf0902c01613fce30c76d6a3bfa. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/BXKG22400577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d234dceb88db338197a5298a8fdb3908de7b80d36ee76ca7b223a84ed0edda. 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/BXKG22403105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f56171e45886b7b86c175fcbb56d04c3c939341b13865628c341c1e50c36658. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK7NM2500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155708b3fcfd45439a6d298fc171fab2639ffaf99f036fc9a9bc11dd63347be6. 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/BXKG22500436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ab3358df2fb9787bc097f81f6b5a65fb1aed709d8cb836db465ca4e8266e5a. 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/BXKG22301179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f46568558065fd8f8c2fcf5fce3112041d5f9f9e23f8674118f2f295bd407b. 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/PTES42400401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce8edbf9c2080957df29f7cb7179e5291e8ea3dfb7a50dfcea4c03ed8ea2684. 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/BKDFK2400158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec9cc1af2b1957f76651736b9e5700db3b11bed94de9f8cbffef3f67c55accd. 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/BXWCK2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1421997951859c25211c81909474f60237b1e04b33dbcd21c48bdc938e7a520d. 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/BXKG22400253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef00ca725b6fae7f685fa58981513c481aa912bfab23805763fe056ad2450ab. 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/BRKUY2500010.