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 0x32e08928a8043fc889a4e99aae5a4588197bac53a22be3eca33326e30b7b8d59. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/32b1a4d5-22a1-48b6-88d3-7391ff897f33.json and https://artists.proofprofile.net/proofs/artist/32b1a4d5-22a1-48b6-88d3-7391ff897f33.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 0xe5aff77c8858a09991258cad78761032e7c2c7c89f667e5b611dd1b3b13577ed. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:31:30Z), 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/USDFT2100108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c22c5910623ce40357b9d4a0f8a1f95d7049848e727791b2c76fb5e7d8b4a39. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:23:49Z), 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/USDFT2100113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a87aead91ff8c8b8bad21feec25ae7388f937c9de763bf56a0405627c41481. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USDFT2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc291ac137a6b0aae89be342cdd28aad2d4ab11137634bedfd7db192bf1382cec. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:59:21Z), 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/GBLFP2514491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc291ac137a6b0aae89be342cdd28aad2d4ab11137634bedfd7db192bf1382cec. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GBLFP2514491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c75762a20211a19dbe4a32b6e62043dcd952d92c16accf5e5e1f9c5455eb5d. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZWDD2586222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a09af5ef150c5ae63e76bb72290807f385a18e291045eb35caedb22bc49fe5. 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/DEWA72200020.