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 0x17a8e02520cf2a373454d87600d71e38e14419b366f2e19c4168c79b0829c80b. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e324638-40b7-432e-9185-0a3adc94ccdb.json and https://artists.proofprofile.net/proofs/artist/4e324638-40b7-432e-9185-0a3adc94ccdb.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 0x4b4e5392fd95ff80c5ea8a7d6b8203b276e652f54e45064d8aa72f9fc4da29bb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR9W12421675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9448854beed3339d502c7e9c74db3232d9eeb488fd717451d5aaabb9424bb9f0. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FR9W12421676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d71f0d825c1d10ea04375ae5188964bc2a8104d6081f5deacc957695c9f4a17. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DGA0E2202914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1cd069db768a1a79ba18ab91960bc1f336e85c2665a3f5a6a07c1d240a23f87. 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/FR9W12362139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63def1216d1faccac7ff213a0986c351a923b03f87e67c7c7d1756a133c6ab27. 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/FR9W12421717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba23db6815a358ea6959926d8844f8b57bf8630027845e5e1087389bd3f17795. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FR9W12421689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4e5392fd95ff80c5ea8a7d6b8203b276e652f54e45064d8aa72f9fc4da29bb. 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/FR9W12421675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818f09d38594872e79540c97e199b82735b38b32efbac6243b491fc3abaa3c7b. 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/FR9W12421718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9448854beed3339d502c7e9c74db3232d9eeb488fd717451d5aaabb9424bb9f0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR9W12421676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79e6ab9e7e2c7741604be48aec52c20e83948a487ffd87b6c46ae7018b477d6. 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/FR9W12421719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52cad3a682b5ec776c629325553fa746baf80e8ef9acbf7deedee73e88226028. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR9W12421691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d2e9e190e25296c1d008d42fcc5e62c42ebfbde0e195ef02164e058f9cee84. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR9W12421720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7db7bc9e16cd7e84b2121c0587dcbfd8a265fba96eb1fb40138bed2bd89c579. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR9W12421721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324c4ae87007df2e53fca5a75733dcd4b89fe369ef7fb252b2097ef898e53e2d. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/FR9W12421693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c10c3e417f56d586872b23c0d447f4f4671d7c01e55a7a0fe4a5af4e0abf3ac. 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/FR9W12421694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935802bbc5f6f5646a8952cdec12145abf1a566e96027ca5f8277ee30c3da8a1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR9W12329103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b7b1fa72b69b873ba7f1c7fc2029ad9b4835cf4eed3bf6d1fd4729c0ee3e6e. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/FR9W12421678.
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