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 0xbf1e46162509f4a1a99787b71f22523ebfad769088f0137068f485e4277a2f89. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5f18cf50-d8f4-4d66-937a-24f77ef02fb0.json and https://artists.proofprofile.net/proofs/artist/5f18cf50-d8f4-4d66-937a-24f77ef02fb0.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 0x17bd90821019907ce638b4c5b624509199c7e67a60ebb6a6ef7af769e0efc301. 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/ESA092436930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340e8828883adf011498f15cc27eb0cf748617fd096927b0c00a4be68b9705ac. 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/ESA092400696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3f1899b97e9d6ffea557157109042471109387eb23981a0808734ac7279849. 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/ESA092402456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8789c7aa8cd6e5c624ef9cc18b77620f1ed5ac4621cc48e08750fd3b24dbd0. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/ESA092404536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab402c85837ce68f42fcb42549e6318cff88ed427691b5ccb552b895ea44fcff. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ESA092406054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6206d8a51f425d37d0e5bea07f979ea6275f63f912ce916f1dc85c20cd14d793. 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/ESA092407552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8c28af8283427a353501bcd89ceb88a1dbcaa788d51e31821eb688adffc555. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ESA092408926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ec166403d5c331aa1e547f19a1c890d1062409887cb444c27762f566219ef4. 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/QM4TW2510778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8c28af8283427a353501bcd89ceb88a1dbcaa788d51e31821eb688adffc555. 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/ESA092408926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6206d8a51f425d37d0e5bea07f979ea6275f63f912ce916f1dc85c20cd14d793. 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/ESA092407552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab402c85837ce68f42fcb42549e6318cff88ed427691b5ccb552b895ea44fcff. 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/ESA092406054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8789c7aa8cd6e5c624ef9cc18b77620f1ed5ac4621cc48e08750fd3b24dbd0. 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/ESA092404536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3f1899b97e9d6ffea557157109042471109387eb23981a0808734ac7279849. 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/ESA092402456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340e8828883adf011498f15cc27eb0cf748617fd096927b0c00a4be68b9705ac. 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/ESA092400696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17bd90821019907ce638b4c5b624509199c7e67a60ebb6a6ef7af769e0efc301. 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/ESA092436930.