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 0x83f7fde4bf6c01c8b25300f7687fd808548b51c98cd50098ba266351d809665c. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7f2817e0-9ccd-4d58-ba44-5c55c1b29fdb.json and https://artists.proofprofile.net/proofs/artist/7f2817e0-9ccd-4d58-ba44-5c55c1b29fdb.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 0x5bd7a635a4e4cd6edcec7a1decf0d58bc21027d6568a4cc68f721226cb851d43. 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/DEQ320400143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc55db3c9c7939a0fb20e33d419631eea6e798828c795fd572033a0cee0eecc. 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/DEQ320400137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9491416f2ff36fcb7bab41499ea571d23cc996c9d2379339fd6c3181415c76. 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/DEQ320400083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49d26af7131d648128970902c62b52aa51dec9ea8a7b749cc51dcf1f3ffd77a. 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/DEQ320400147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09cf68ce60028a36be66dbeafb11ade045cbadce4c29d0e536f20e10db1c334b. 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/DEQ320400148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5613556b1a6282f620e99a432b6f8913f303617fbb459c3db97fc719523bf9. 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/DEQ320400082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f26a6744530b9f52fb91ce4c78fb43affbfa6cd83592228a8c252e5349b319. 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/DEQ320400154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77567f2edbac447abdc0a0aaea5440ca51c8a3c4cb078785605a7eec006c8095. 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/DEE860200970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa845cbdd5e521ede4f22acf0dbbc75f1a86726cc500006f2d8d6f2b5e359b2ce. 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/DEE860200947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0adb9053161d1eb642f2ec6a4af73b1dc2accc89f83cc2dae14f17a94ed93b. 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/DEE860200964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4587c9093c5affdda85bc395bd83666c883925f3a4da4765bff3ce2906c67f1a. 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/DEE860200965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee12adf6b2a15f6c94a93f38a1659dbaecc9abeb1543da99619279255458a11. 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/DEE860200966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa884d101f739af88689c9f3dcc663c2f540c053958b5b88e0b41a3138ff35218. 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/DEE860200967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aac582785c0f099a07bbc0bc423d1001e6807c857426ebe30cd88c8cf2670a1. 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/DEE860200968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77567f2edbac447abdc0a0aaea5440ca51c8a3c4cb078785605a7eec006c8095. 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/DEE860200970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75f20809dfb7d29451c8af091f8e7f31dbd938ba4a9b4d88c168a4f042a1aa2. 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/DEE860200973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2416df5260d6bfb59d8ca03f09bb0a36dd8203f99cace929a6be216d5136c9d. 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/DEE860200974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a85fa5baa750c969be88c7afdc1a9a7a4ecc018e172672a34221747724e325. 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/DEE860200976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c921497134002df55e9b6aabeef13550fc084dbd734096b26a0b3ae78a7d61d. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/DEE860200948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eda1098b5144ddc55aeceaf0fd2613e391685639232179f63690c999399389e. 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/DEQ320300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7d654ac0d41da2d94cd44d9c788d014340f917d8008763c50a1f767165ed71. 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/DEQ320300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5f87816fb3bc8ec53503b38b75387c03bfdfe80ca86a5260c03af74034ede5. 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/DEQ320300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538452a9479d18696d1e3df13a687445f55d0458dbabb9107ddfa49d551fa875. 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/DEQ320300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30235c96b0759222ca1ab2b6858d2791904bceda89793f2a6dc9c889c0bdf05. 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/DEQ320300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eda1098b5144ddc55aeceaf0fd2613e391685639232179f63690c999399389e. 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/DEQ320300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0adb9053161d1eb642f2ec6a4af73b1dc2accc89f83cc2dae14f17a94ed93b. 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/DEE860200964.