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 0x1839eb0b5fc83f5c8a909b8ba853b23733d27b28757780af9b9fa9d1188e19ee. 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/31f135dc-f9ef-4185-ab2a-0c80f5347cd4.json and https://artists.proofprofile.net/proofs/artist/31f135dc-f9ef-4185-ab2a-0c80f5347cd4.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 0x07a67d40da1f48672d2d19a86be7bce51b6946fab573791bc52bd92a7f66eef3. 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/QZFYX1994146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abe456cc8df94e1d432e634fcb0c009d861ea7085501a56150c55c3dce6285f. 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/QZFYX1994147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe283ae45d788b7f81f76fef3be32ad39e219c49562b885082db2838bc5500639. 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/QZFYX1994148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656f912f5fccc7e78372ebdbb30445daffd0dfb43299c43e0f57655db229caff. 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/TCAEF1904371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11af6217b39107db61a2a53952629d30861042431d27b984ba1143eef53b3daf. 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/TCAEC1978545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd21a75787e004a5f9d541060d0067dec70b0c7193757cbb9166c923e7bbccd. 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/QZFYX1994149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886035986b1b6d675f0db6ebc3498ca8f9cce0ae0de8e5cca7cf3df8dbd742b3. 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/QZARB1842390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92576fca95ce676c089f32ea117adcb1219bc536cb70c7b6ebabf93a9eab186d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZARB1842391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd80d3b5e23d516e503e3c8bc04a846578bc0a745bb30b7b5034182626d82b14. 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/QZMEQ2034302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25362c7e63333875d1cc63d9332351280e453e66a0374f65e932ee8cd1345800. 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/QZARB1842393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2acc5e51e9f94f74db15f8f0c9ce8e84561e631ea6767444542faf1d04991d55. 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/QZARB1842394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb108b5c0ff30147a93dede260ac2166d7333bed7517d70800a9f78e502ffd111. 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/QZMEQ2034303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf9fb1dca1db3f433737b4f8b32935e2a4123c92d15ecbff1fc7098982c22db. 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/QZARB1842398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19ef9f70e1e5d3c98fa9c5865e92c4b7b2e05d5ee1b85a39a76fe81c0277e08. 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/QZARB1842399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3275ea6f923a4d82bb74dcf7c6ee2dd7533cbd70ff1ac82b41b7bd20fec0822. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZARB1842400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1bc19449a48796ad1aa965524c1d7808e628398909f8ff3de5ba206bbad62c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBKPL1938392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de0a50bad2bc565f3e64c8a1ca20b0ee0b775ea2fcf23b22d645d9cc6ca1f11. 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/QZHN91939997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de0a50bad2bc565f3e64c8a1ca20b0ee0b775ea2fcf23b22d645d9cc6ca1f11. 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/QZHN91939997.