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 0xad2dab95feb495a0d544c3b92d474f43dc2046b433222ef205d369321e85c31c. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/afc362de-ad8e-4c83-b743-d9571ed931ea.json and https://artists.proofprofile.net/proofs/artist/afc362de-ad8e-4c83-b743-d9571ed931ea.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 0x0e5ec60cd68797369c26f00083a68f9f829c493e9ed963de606c964771a6b979. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/USL4Q1978044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd890e144487b25b2751c91017a8bb24bab55b485987aab83a14450f131271bba. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:30:16Z), 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/USL4Q1978046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e4461a78a58b0f7c8cdfa79eccfccdb4df7325a05512e57dc63dc28668416d. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:07:36Z), 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/USL4Q1977990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aea1156819b39866252590ad327bd6e1a2354da74ca5df076e65b227b3d5f81. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USL4Q1977993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef28369ad126da7f2f6db0a7e66118e4e2c2ceeae5d74603f659ef46c0b765fe. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USL4Q1977995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17da25a4fe0dfd5507f47ad1c9fc298d25f3aa5f687f17877dfecd1cbe0565b. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/USHM82062647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f51d281363d2354e8244772cc616e823a325fa5425e4e5afa806252c11995f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:12:18Z), 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/USL4Q2280902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de558821e79450a4bd5d1ab48c7109ad2d632f6318b46fc95e5c03945700587. 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/USCGH2324274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1823c063dbf898ab4e4b03c00b7ae24c3c441548be021d092ddfbe00a01fcc49. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:31:41Z), 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/USDY42352174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa774f534ca93caad393ca602d56ffda6aa8d94fbba7d3fd28bc4f8733c010763. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USX9P2359119.