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 0x46ca8cb2f1e2de20105058660cf259ef03bd2323253c8e04f1183f4fe0e656c0. 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/d0e9196d-77b6-4cbd-9eaa-03a479420556.json and https://artists.proofprofile.net/proofs/artist/d0e9196d-77b6-4cbd-9eaa-03a479420556.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 0x6963a9568a642a180b2d2c7eb25c7953009ca6b2f2227912de6bee1b70ef0444. 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/FIMGM2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3406019d458f0673535290188a8313a6eafcfddf9300aadeb021a872cfa856. 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/FIMGM2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecfff78789b5b06b8761f27d4e14180f8720be88e74e4c1d27246722f04998d2. 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/QMBZ91974492.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb700d195e405456115486c9e6fe52b5289936524eb66ae3296d44f3984a09c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T14:05:48Z), 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/FIMGM2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e12d231599f78338177aeef46da453039997f772a7b71650effeb3aa05849ec. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/FIGRF2000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41979d5566085d4d4c8ab9445ee0bf6be5313d8c1681d32b22d3e02e0eb9763. 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/FIYH21400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2347638b7494827cfa81120f6f8bd6fc3a9205d6aadb51951d3f86dfccfc4d19. 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/FISPX1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307fd76f6731dfde4f4a13021b99b667f877e445efddd88cafbee5e60c8e42bd. 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/FIGRF2000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42e3ade516439248d1fa29e77497f62ad4926ed2d458d46790012c10093f029. 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/FIMTA1000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb73fd5b7b34a46aaa32399c679b9c7178cfdf6e0a029c0035e4898f3bfe0366. 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/FIMTA1000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de4f11e22d8b43b042b6f21d583bbdad84ef0b78d7163b8d746a247a12ed52f. 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/FIMTA1000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a06109bf5be8be567ab3edf2482a0ca332e5554fc3ff7162e14d1ccfa0a879. 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/FIMTA1000023.
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 0x49791401a99ca15c755c32445cff90f1eda11d109b80ef0f9e5805e9712efc7e. 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/SEYOK2201113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c8a9c9a8998de5586310dff54ba8c13cfb75b8b761e7e9ed5bf6c1e10dc6a9. 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/FIMGM2000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026f5c9136dab423c9a6b807cfb242491690192bba4239084b3ef211e82e7586. 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/FIBAR1000446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea3bc4cb551cdf9ab33864e2d09bf54a59d78106d663ffad9da09ed1c9f91cb. 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/FIBAR1000441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602b198973efee2c934adca21e8be42e0be0108cb25b3ada37fa388c3f81a189. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FIBAR1000438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01665e3db537a5cd6e631c364d1b9962c68de5264f02eb6272fc5826bc675d0e. 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/FIMGM1800044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7acd3bd7ead39d719d526734c458d7cab77dd7a8a5598693c767b8f4857049b2. 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/FIWMA1800205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c8098f0b1bdf5b3e253ca5160b0106db83d418b5b5453ceffe0c901d36bf73. 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/FIEMX2200099.