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 0xb90a939042638dc508083c2e9b554b5ba9a0cd8f5ab9f63bf46954ca1ab7824a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2d7aae3d-6da0-455e-b958-0177c12a7ade.json and https://artists.proofprofile.net/proofs/artist/2d7aae3d-6da0-455e-b958-0177c12a7ade.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 0xf8a852f73d8ff5fa353f6b1dff2ba93af5a0e7f5b5193f17d0f8056920f7e3bf. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:38:48Z), 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/QZMEP2278658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4669573549cfb885bf572fb6b9fedfefc402d09e01f2c0a65c45a0e1ec5768. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZNWR2298545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9d943d74a3be833b97c1892ea6a45f9ca3a074a05013170bb0ea3b6c4a3734. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZNWX2247467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd3e91eb9806125a5f1f4f95d71c89ff809673ee4ee7738de0bbba85674a464. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/QZTAT2218246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b9538c2f7c17b040343b85b335d179bee41788e5fa410a354bad8fd318bdab. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTB52290318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c274e7f34933f68fc81f3d38ba480f0c719a9b5899cf4da4e7e78595e52592e. 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/QZFZ32384451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9d943d74a3be833b97c1892ea6a45f9ca3a074a05013170bb0ea3b6c4a3734. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZNWX2247467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4669573549cfb885bf572fb6b9fedfefc402d09e01f2c0a65c45a0e1ec5768. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWR2298545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29ff8bffff4aadd1db1e20d24acc9b2dd83cb7214de59cc3c07738ddf793502. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/QZWFK2387412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b1d4ac0844a30118cf9ba52caf78326382becd7767022d4745d4577dd9a160. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:04:19Z), 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/BE7KM2300108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7323f272ad5b587063b918597f63d824f67958d6e221e505f42e09229b59490. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTAX2357731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7f16cbdf1fe094e15e10ab1a71649bfad2bcf6a1c863c1343d1d6a8c19c45e. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/QZTBB2387926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29ff8bffff4aadd1db1e20d24acc9b2dd83cb7214de59cc3c07738ddf793502. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZWFK2387412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3380f9b19bf58a066e81ceb5f002d9ef16b0887b847e485a9a2c2c3efcf09cc5. 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/QZFZ32405115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198cc9d70a9e469cf17463f84045800af0a58ec498c3188779653d91bfb8dfd4. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZHNC2528138.