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 0x2d363620c6007bba880e64890c0205e2bf70f64d5d0d5c11f80f78cdc48f3179. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7262431f-f13a-47f0-9d23-74c6bd87ac23.json and https://artists.proofprofile.net/proofs/artist/7262431f-f13a-47f0-9d23-74c6bd87ac23.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 0xdc42a2b69797299d1ad52305b60bfc7a3dea67a5e822696a6600f54ca1bf1ee0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USSM17500238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefffb56514ab5c8592fb9a06c1395721032d91c257f368ed1c348708e2ec9834. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USSM10209707.
A Chorus Line - 40th Anniversary Celebration (Original Broadway Cast Recording)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31455c828a18501e8474bfead757ede76121318a7d4ccf96e6e5159ba806455. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USSM17500229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb39ac8842af11c9364747d976788def81c8ed056d92b4f39342943c6648eab. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USSM17500230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4430e3bb3afbb80480b865ea439c0f6489f3b53930b3fe8b2606878dbe3ba792. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USSM17500231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770da2cde3a2a979af390176530671407c03681b7bbf3d8bb7693fba9daf7ada. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USSM17500232.
Montage (In Three Parts): Montage Part 1: Hello Twelve, Hello Thirteen, Hello Love
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e1da9e5e1c88c13f6b57bd2226be66f6b9cb22fe3579b840e25b47d360d450. 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/USSM11505248.
Montage (In Three Parts): Montage Part 2: Mother
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39d5f679d0dd4b27267a404b38c12a30d4ea2661eb0656fe685a31c9f24cbc9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USSM11505249.
Montage (In Three Parts): Montage Part 3: Gimme The Ball
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec2bcf2430275d4a0bd99e78606a183556c6f45050f9e9c30c4d287a27d0bbe. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USSM11505250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e222eed31182b8452c198e7a899ed4581fe12e2ec8b0f6f33e3b36ef90a038e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USSM17500234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f31b90981773d59656b932cb711d5d2fd40aad208f253d8cdf9e5bc2817d974. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USSM17500236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa715075ac1fbb543f02690e96e0870835d0ad8ac8fd144f823cd5e05a66318c1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USSM17500235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefffb56514ab5c8592fb9a06c1395721032d91c257f368ed1c348708e2ec9834. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USSM10209707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc42a2b69797299d1ad52305b60bfc7a3dea67a5e822696a6600f54ca1bf1ee0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USSM17500238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50db10ab84ce95b9bfe312c6de0d6db9f26e9221e548217555a6e2a48e8c4170. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USSM17500239.