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 0x1670f4ff2053bdc7c6dd258dd3c48c85acda45a6f88341ce7951a6dc052433e2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2e26bb2d-4cce-4e7d-84d5-a1fbda76789d.json and https://artists.proofprofile.net/proofs/artist/2e26bb2d-4cce-4e7d-84d5-a1fbda76789d.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 0xd279c750d7d7e7830fe2e8eccd7563c0fc8e74d5822ffe40c7799cf93f8f04dc. 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/ATEK02377008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa19c32539ed9a89f6097127ec735def0d61496a9ce55396a32a6c3a0986576. 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/ATEK02277664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdacfe181d241d1722437d06c4df454c36e0d84159f5ac6d121783a68ba77de5d. 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/ATEK02355321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc5970b24846f16a2d0b42ae21af2158a7e8a09d664764a11f94181bfb18ac3. 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/ATEK02277583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4271aa7eed5e8b43a71c856aa520690f17b1869cbbcae2101ad9d53a00ba142c. 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/DEPI82432008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6734aef200187ee4f61adf9d046d37a87c3d07c52bca82abb6696de54f92b9c0. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ATEK02355882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b67b06b3328dd578ed0e18f565fa131e29ae42d2fd043986775851c9da9520. 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/DEPI82323848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35be0eefd380ca5611e704a32eac4c0e1102561a37574945b06b557cc72878e. 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/ATEK02355946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da561dda228664a3f2c4584226f0ed4bf3dad6f4afcba6420db7ae1d0db21ca. 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/ATEK02356026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd840da5b17ab8f8039247a38bd52112bad0377dad2905f502a24336e809e6e7. 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/ATEK02355613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41108f8ba33d7baad52b1dabd3aa6751024d16015534dba1584eeee9e5437e1a. 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/QZMHM2318560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ff87b7f5cd08d9058174068e1e23d890e74c2c11250c50bd8b167184558dc1. 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/QM4TX2358260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf886ba2ff527d5540f48467ae8bfeaf2e069aa4f265688cfa83a90afdfb9976e. 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/ATEK02377057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b5a7a78269cc6736b1ac080164b4c46cf02d101cc464caffb0267d08f6a239. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZS632356294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a6b8090b0748f09a380910f66bd0274c5628128d05045ca7f3a026420fa0cd. 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/TCAGQ2208822.