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 0x00a8abbee389285339f32bc2d6074ad349f9c23253be043fb64c723c7f6d7b3d. 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/ba775d74-8c7e-4cf6-894e-b015d4a3b8f5.json and https://artists.proofprofile.net/proofs/artist/ba775d74-8c7e-4cf6-894e-b015d4a3b8f5.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 0x709f1ac9929dfc706df5e3f0899eb617f48de704fc31ebcc484c948e31b3e2a8. 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/CAWHO2033513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198da186415fa7fbf007ba57a42bf7c0664bbb1b63531506fab58addaf458376. 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/QMFMF2377556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f67181f3ceb5c6606dfbbea77f487b99ae6d713df0d158b42a754d54ac5b95. 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/QMFMF2341339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8614bb74548a33bb7a08564a47cfd4663a44214898cebc1e608768eea4e33417. 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/QMFMF2335690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc83ee03a8b13f472b7bfd08eb4b69843571c763070a82361fec7c35b6b6e35. 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/DEMA61906907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7a5dea0336848526e89abf1bf050c8018b773553c58593d71128ffc3007ebd. 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/DEMA61906382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c6f8f9c21e8414e86a6ac44175b313eaaa03b6f360b467dc37bbda473914de. 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/DEUM72308578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44cfda3653a15f3eeca715617b1eea5de1bce854f5a7ec30396a4b9ffdd7338. 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/DEMA61906640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0bc0859e352edbcac87466db791c8668de5fa80aa3248eafa2627e9655f89c4. 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/DEMA61906512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38569585edf01d10c166979deb06e2f26a358345b0b85c86a7a50845d74a141e. 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/DEMA61906460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f133b60be2894e4782ec1b4ab49e0f70030a717fc09c458a680327f261d842. 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/DEMA61906380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9aa1034eaa672984f4a967464ccad7c511568705bbd85f3f2241e5c7629e8e7. 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/DEMA61906290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3c68ded5aec86db5d61172ad940cbefa5888cb357028b124f263cd54771529. 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/DEMA61906070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57087a05de0b86d1b442c4af5767a30fb6ce9d1ac846b9cce4ebefbd3ed103f5. 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/DEMA61905990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa966897b90b59c393c34d015483d607ae903d5db0dccb70f6d11e20a02ec31. 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/QM4TX2233096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389137b375f62f0325aee4480637e0dd28d7bc05c08b884e9b41dda7ce0ebc4e. 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/QM4TX2217230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d20ac0c03c912103f85babdd489d0800d746ef7dcaa8b3c3b980f0940f6f38. 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/QM4TW2243840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103f8236b40d857239cd398ac40523737fa1106ba64f51af410ff7c179776b9b. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/FR10S2210514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3b409bf1078c7292c9ec9be1f64a793137619234a6454a546c0c6c9c0e7162. 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/QMDA62147255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db9264564e267a619e8603f5220749f5d0aa9bbf5c56f9c99177110584ecc2a. 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/QMFME2148122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2fdefa4a1e394b92bea4e1db268ac0162df6825a1718a33adea69bf16b99f8. 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/QM7282138469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c03561a1b7612e4db588a6ee78010f1f9077b0ce2b0450f6995b8cb0074a2a7. 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/CAWHO2030350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa870c5696aee9142698cb38fb4d74da863866b1c17b1ade2c943d2d3e1247465. 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/GBSMU7639542.