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 0x321bd3b78541239b765b3a38efe5838410a748dfb660d7df0685171f3a75d16a. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b225c5d2-9dca-4394-9740-e9a43ec28b11.json and https://artists.proofprofile.net/proofs/artist/b225c5d2-9dca-4394-9740-e9a43ec28b11.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 0x11ecfbaaf46f504ae72479c9d39bf6921c269aaec279e8db314025d4adaeef33. 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/QZPEW2578082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bc6e06ac359b80f50e663d612a5b747d1e2de9a91070494012eb7b9ee0d7e1. 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/QZPEW2578084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d0acbb9b077b9732de3ca16351905f109747647885c4fecb419c30585b4dee. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZPEW2578085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bae71a504011e3f6bc231251855f7252df2dda1490e38c667bf858ca42c05f7. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:07:55Z), 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/QZPEW2578086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037d38b5fbfff13299a9da58c3c642763ddc9241695eb30936ddf6412e410c45. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:33:09Z), 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/QZPEW2578087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65bf7ca1c2601c7c06a29b615ed5aa4061d6dc4aa3993dd98eee2e052fc2719. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZPEW2578088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470097b2921eab1068fa311b2a44dd8365cd73583bf984998dc0d0d618ca343e. 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/QZPEW2578089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d518daf3ac0ba69cde15f88ae10c8ec1fcc3457e996409f2019a0dee0a538c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZPEW2578090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4f21f2e25ead45d29e543e22361933f69dc8f826ff2d1ee48c2d7d668f6a30. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:08:59Z), 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/QZPEW2578091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d3020f72222dcbfff1752a46384bae5847d0f1dd4385395aaadd7dcc0c101e. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZPEW2578093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee73dde32e47402e8f976798712e6ae5307761fe3be206f393cd125b341fbb39. 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/QZPEW2578095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070e39f6e0565cdbf0fdf633c70480c0da8073e6b2d4e2cebee11f3c2c349bf0. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:10:45Z), 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/QZPEW2578096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5814e957254392f5467a190ceef063994b979941648776d239ca1b882b8037c. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZPEW2578098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6791134b07fc08cc08ba31545b0dffe74cb296bbbc26af56bfdb8d35d7a98f1. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:53:43Z), 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/QZPEW2578099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430cf767f56b74a6565b0485968b7a0f00d7b3e694503776dba58a8bd52e2ce5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZPEW2578100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea1a1db9a28f6c3d148ff14dc0fc3b2903bc5610144fe8d8ce6a54e4134dc68. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZPEW2578101.