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 0xe4f39ee6126a0c8cc7ed94109f66ef0312b0b11bd52bd3df2b145112b844e7c9. 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/7a2ec23a-155e-4aa2-beba-e7824d8b3fdb.json and https://artists.proofprofile.net/proofs/artist/7a2ec23a-155e-4aa2-beba-e7824d8b3fdb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Reality & Fantasy - Gilles Peterson Remix
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 0x9e5233392e720b163ecce38cc396982f68475487f8a3926d216d59c4bdf56763. 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/ITZ041000056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c3542ebf026af32cb55b9ffafbab2025d6c4367f8705e7cd8ea0b7a36d0a22. 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/DEEQ21000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65d73e4e7511f70b613e8a291683664a4091502c8b3c32c6502fd4d22233ae8. 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/DEAW11000190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d29b01a7340b59b66a7571016c73667b9108568791795c54aafe5b92de7940. 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/DEM090900210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f862b3368b430ae674b626895d66c3a1d7173e81377bbe50918f4a1abceab3. 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/GBHEZ1000520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cca1a20ec2d55f6a52bf37514633b9623570bc8bddddf71afc48ae5300c403c. 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/GB3JG0900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1384a17d69b987e3c7600288d9eb16f6830af00799fd167a0412a46cc08d1026. 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/FR0U31000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72adc2478e56c1267a21efa2b71791bed6cf8f991e57ee5ace50e7b2d08bd9b2. 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/FR6V80841054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6349b7b53fcc227981097acf3f726ef6471c41ebcb623670eb349846019b906b. 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/DEP960900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc330692523585247db1a3063038df7651aeb52c4928615dc0600a3241aee773. 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/ITF650800160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e9c0f857d48fca856447adb3b1315381b86b6c64a2f31813792a832dcc75dd. 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/AUGB20800171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9381671ace2f1ef205bc87adfdb51af2bbf872b20950f1bcd0e111d371fa4f8. 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/DEM090900157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ad2965682c0187802102f70671dde70e00dc3a9d3b514bb5c212b4b3fa9c38. 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/DEW260600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b39f2e85b1f6a2045b1449f03ab77cc57cc1d823705b113a78315dc32b4d5e. 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/DEAW11100252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e19bd0c8985b907d00cd13d46c9d5f7741aee32dcc2929b1ce855d4e048376. 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/DEAW12000053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7604239d6dd84d18ab9b23f595a02f0e1c170e000a24646cc503144aaf7524. 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/DEAW12000054.