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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee45e43000ebd9a7ec8c57dd8c0d6da5ce390e5bee692746397b78b12f813b55. 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/10efbd9f-d6cf-4219-9a8c-387aad5446be.json and https://artists.proofprofile.net/proofs/artist/10efbd9f-d6cf-4219-9a8c-387aad5446be.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260fe2609070505dca443c68024e66a958599a25f65e9fa5507940b2d8111fa1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHN72415291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe22786b1605f783ee310f9772e323c01acc7972ed0d373322d09158dcd784ac. 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/QZPLS2300451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782872100d2d150cbeb2147f7ea84f4e626c08463068987a7f51d157380dcdd1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTBF2320886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989341a2c221216d5ad6802fa7fcf9b12245841422810f1096c6c3be482ae355. 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/QZK6P2432813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2e99422cf564285eb0717c17eecc6cb97bba656d5cf7d28ce9f665af529d64. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZMHK2430517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4652455f804855f496cf782a7ff594b788a78489c24f4016eaaffe8e3eea3b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZMHL2493449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7194a9ccdbb3759c05bacf87d5137acc5a781b480f4ab0033ef2febfcc0fba8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKN6K2400309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6186aca7d17372851c6e63e4fd8e48ff64c3f4af98e197577dd0677a5f3428. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/UKN6K2400310.
Nothing But... Hard Techno Essentials, Vol. 23
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa423ea0f2cf3dbabc5cdd5a3166571269208fa02c0257c8e682722319108f72e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHN42521504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9aa53b9cbee33c4616c8e88736fa6e98ac55c49c6c5363e35fb58734eea8a6. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZFYZ2523531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da4153c5afaa637e96cd242916c2e07b82ce0d4f9ccf8886c536cf17c8a1840. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZZ7V2490516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b26f9f4875e4d11de4548947f1c82425801f543023be0077e2849b70d2aae1f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZZ7L2448446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6186aca7d17372851c6e63e4fd8e48ff64c3f4af98e197577dd0677a5f3428. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/UKN6K2400310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3daf200fe28374a2b06860a9100df0f56570b867fb164d9dfbdf041c6fd78c. 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/TFT202400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f78f27b1ea18e8e9a700e6e866fdc0bf272653dc8fb44aa4d5b46a5f436a68. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTB82328878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c04e0dd39a540b8710b11581a8e4e052c75e3ed005602099170350845ff63e4. 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/QZNWV2324244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f0757880b53fa52383494f1fdfddc61098d317c598d3d722296b5e444cd062. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZNWU2332009.