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 0xb5140b7abf3cf555b83e0323c9713c538f04f5f8fe1786be062523e5d1d0b479. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd42ac15-f2e8-46d0-b62b-52e7044a53b7.json and https://artists.proofprofile.net/proofs/artist/dd42ac15-f2e8-46d0-b62b-52e7044a53b7.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 0x19d7cdb9ee6c78e7d9ba4aaa8196e7edde1d43958189eb50fde78c72d9a490d4. 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/QM6P42060065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1669576108b4f77e81a559bffe19ed697864eba8158d8c38a26d1e2af48922. 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/FI7S52000113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd84f59c1d4065453b360610789ae78e93430628cf4ab1d91e6bce443fae6e7f. 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/FI7S52000114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e695a8927fad6c85b0d6e10e1513835611a20a43ec7053b1f654ad22402e9a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FI7S52000116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037e99b3178d2b11bee5e64e6b7c2aae49cda255539c6add57d46c76fa611760. 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/FI7S52000118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4609ef293e012bae11b83d83f6adeee61d7f1b1afd23e417b8ce01d72d9ea5c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FI7S52000117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80125bdc692227f36cbb6c5a4c5c4b30b8c79c13c6437ec2575aeb7cda984598. 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/USCGJ1972442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c2151b18e86a7d405bba52969cbd38503525de5dafc26ce3a8bd5179e5c792. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:57:34Z), 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/FI7S52000119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1669576108b4f77e81a559bffe19ed697864eba8158d8c38a26d1e2af48922. 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/FI7S52000113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d7cdb9ee6c78e7d9ba4aaa8196e7edde1d43958189eb50fde78c72d9a490d4. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:20:13Z), 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/QM6P42060065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4609ef293e012bae11b83d83f6adeee61d7f1b1afd23e417b8ce01d72d9ea5c. 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/FI7S52000117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80125bdc692227f36cbb6c5a4c5c4b30b8c79c13c6437ec2575aeb7cda984598. 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/USCGJ1972442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a6eedade8a8e42cdd269082018a0f2fc58f0b5c1d7e808a896491bf7b98e6a. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/FI9PF1700117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f918c9d51115b34bca93e6399691b7bc6ea66ca937fd3f9c7565ca1119961b. 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/FI9PF1700119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa159c4ae986c8d3bd5643d88e99667787eb1495492a1db551080ab467bcdfe18. 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/FI9PF1700120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c7a4ba50d06298d2e535ab9c132a41739fec210fd182ecab165fcd7240947c. 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/USDY41782908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9171e27ad45405e0573e6152ea531274fb37f2cd4f63b5e1dd039b1ff183d1d4. 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/USHM21763663.