thumb|right|upright=1.33|The structure of the DNA double helix (type B-DNA). The atoms in the structure are colour-coded by element and the detailed structures of two base pairs are shown in the botto
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 0xcdf00ec7600816cac2f8ec62c866354184db182af50e3a97bed020c3682ddd01. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a5e74d5a-4fc9-446e-b890-f072e9fa65bc.json and https://artists.proofprofile.net/proofs/artist/a5e74d5a-4fc9-446e-b890-f072e9fa65bc.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 0x57df194401b60a8159524323e02b26a0e1b0c709043aed154d608daea4980b95. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZFYY2591352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930e453e3f0eec1de1cfc01e4dc25b9ff0ced6c18f97ebbd42a0e56d8ceefa7d. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZNWV2590792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c29031d73c9cad0992451dc9fab08a863ef248747f18d19a1bbde6b130b4d9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/IT0QZ2500053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c29031d73c9cad0992451dc9fab08a863ef248747f18d19a1bbde6b130b4d9. 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/IT0QZ2500053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83427d3d7687118162cc1e635ee29a381cb1a658645e4ca997f3616e83ec210d. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/IT0QZ2500056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c3847d596e750db1e42807f2f1ae26241c59e0dcaf71d117d386101d9b3b4a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/IT0QZ2500057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf266977b40cd580a83ecbd1a87913f07ae0f547da27056c552c337f17fd17f94. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/IT0QZ2500058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f6b506085945d29079d12569b7ccd1da5ad7b5585ca9d02f7597fca6489e34. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/IT0QZ2500059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57df194401b60a8159524323e02b26a0e1b0c709043aed154d608daea4980b95. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZFYY2591352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21810329555e5388ff8c0746e55f66b0ea6d12bd5c50ce15425362d707bae25e. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/IT0QZ2500060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21943595ba055a644633fd7a2c8cbad9f40d138b10ca45fbaaadac066ef73fe2. 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/IT0QZ2500061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26642ae55ee93539fa8d36129a0adcc6db9d40772993cf57d90ef89078074f73. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/IT0QZ2500062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336c58e6c6ec503025ce9c2764c0241c7e7e98ca3ffa9741ab58443adc64597b. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/IT0QZ2500093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a24d22067c84c72a9497609ce31a32b8cc653f26ed9215de7ad09ec71cf14a. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/IT0QZ2500103.