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 0x39dc1d828fd9a1ca5705a70714841132bfc7bf1c9f06719d7e76ff224111e97a. Chain 2 (Bitcoin): anchored in block 954556 (2026-06-20T12:14:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad1fb847-936e-418d-afb6-5cd8791f25af.json and https://artists.proofprofile.net/proofs/artist/ad1fb847-936e-418d-afb6-5cd8791f25af.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 0x8a88e0eca8aad93482951b7975a4748d979b66e8ba2f8019498579998b997d78. 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/FRX872380570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc9f11f80abdfdd7f94df0a5ee6c671ee5f86b1342efad11f6f41981c849a07. 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/FRX872380574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6fac51ce6799a894c8407c496c99e1d35b6cb6644a80784a525aadacbae02c. 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/FRX872380575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9c4057688008f5962b02f09b005a808a6866de60c4dac343d69539155fd3af. 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/FRX872380578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c173af4f1809f5be4f0ca341c17fd0b0a0cb3cb97ec5e2cab4e831823d9207. 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/FRX872369883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08eacbcd49b454e1849e08228588e24bb70a92a4106ca713a33d3b7c7db91ad6. 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/CNZ511900396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8a67d047a78155679752c418ee5b7c7c987ca24dbbdaf09b9c6887a6237bd6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKG732141903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bfc9191a9e7fd5046cd92c6bcb89aeec81f384e2d43499c5e037e96e8f4b560. 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/CNA132301884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c43b5eae3ac373da6b48abce2a28d8001710cc65e51ad3471a1b810367d474. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CNA132301885.
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 0x0d2b7464243001d747111e2d2c1bc38f4d1f934f3c47d559e5d0279b4045f043. 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/HKG731754754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2b892dd87597fec430ab831e4605c5fa1e8c9901960e29d85a0d166ae9114d. 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/CNZ682400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d776f8320462690568724ecfbed41ef766443cf5cb93c99d7438fa3571cb0db. 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/CNZ682100297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3964c31c6e4abf62654daf4b672216a21723b5167c18de7473b3ee4f232c06c. 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/CNZ682100296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b13f93c637eb9510b50bb75b22a9b8db8d0badc980919788c3edb33ec431da4. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/CNZ682100345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86f2fb306d11fdec23b1eaca7905f12ae6909849f90cb329aa8ef5f26fdd925. 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/GX3Q92091923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75977dbeda71fbf05712f35e81b3e675c72dab747b0715625feb1ac62579a43. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-21T23:34:01Z), 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/GX3Q92091924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4cedc8f477df975f47e4deed57327d8680ae5136c8f850a85dc62040423115. 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/GX3Q92091926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06591432f17ff62854fe04cc486251db21a1e952b9b5cc60dc3a2254eabefc7. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBKPL2162097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15368f4ff35a86720b85a1a50af1e9bc650a4a97217f6a926f15d1debf66fe03. 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/CNZ682200361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf0e09b7062ed86b77d13d9efacd3e462bb002fb9de873254461ac276f9ec9f. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/CNZ682200362.