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 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 0xce6c4d41843981caedaec31be157c65235599697777d000f1cfc3eacfdaec71c. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c1457282-1713-4bf3-8244-9ec4509727ae.json and https://artists.proofprofile.net/proofs/artist/c1457282-1713-4bf3-8244-9ec4509727ae.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 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 0x444d57b9f7e9f3361fe760755a20fed7a6a21c9059ccb1c379cbe1f5d04c4d9d. 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/UKM4G2301001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53e107234a64fc72209fb6543e3b9393f50a59aa2a5e699acb2e9d1c7aa795d. 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/UKM4G2301002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d21be53e8b94146308381d5152b1b2b73ef39a8c61b8c9233bbe18f9cff16b3. 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/UKM4G2301003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090018d41f421fa801cefcf2695bb9263a1cdaf3c4f0d3cc223b303275a2aab9. 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/UKM4G2301004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b07c9bbd907efde89ee042f6ea8c399bf0e64e2456e20177c37c689553c748. 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/UKM4G2301005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc439209ca0a21c887f6f499037eed19a4dfada726c231b86524e459d8ab0bb3d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/UKM4G2301006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65825639651ac3e0a7b48008fbfa02159d7009e10cfdc799e37e70da53e50209. 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/UKM4G2301007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7abe884e7d26deb8c613d369b3f9154b9f64143247d160cecc7a6802b4637827. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/UKM4G2301008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f81e41fddd80855cdb159fc741041b8c9c5f70773e962e5a228a307f12f1ae. 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/UKM4G2301009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b7ff4e72bef7f97e19ada597f533afe5065bbc52049c0f4200c9398cc5ad8c. 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/UKM4G2301010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe040c4f604ef02f9c79884c533d2bbe63e2bc8ca0e227cb918f6c10c7fd391. 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/QMPKX1722224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe76f5b32d03c1e0a9022ba43a17cd69b08974be9b6a362017e845c952cb16f. 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/QMPKX1722225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafec8c53798b7cc7b9adddf5b7fc04f2b602cd91fd0cda79544cc91d03671c9. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QMPKX1722226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee0967b4370e987ad6738c6d9a435228d39abd0a88e2ea44296c6c5441ab15e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QMPKX1722227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808d4de43043a0becd1ae953271fe1e8bfe45d3077dc9540b462298d57b64b81. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QMPKX1722228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8d647a3fe3ecbc30a01efe91c89927700b994f97bef0cf2eb9d8af2aa6a703. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QMPKX1722229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5caba09ff799264c4961ecea488376765d96436aa1d1fac1e69b718db7e1e303. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QMPKX1722230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd977b27fcc8f44ee65158fd697ec3de8eca094861452be7040a844a6d7cbb951. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QMPKX1722231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000fb6c638563a263176bc92326858c4f26fddea2b98f4706a2053403c39c9db. 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/QMPKX1722232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028ebc19d930a6beb021b40fabd1061e745e1c1be60f71b144a0822ab5211819. 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/QMPKX1722233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a3572eef0fadefd1538985c634cd8dbb7355ba61f4b4ea20847015637d194a. Chain 2 (Bitcoin): anchored in block 960306 (2026-07-30T20:23:53Z), 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/QMPKX1722234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53e107234a64fc72209fb6543e3b9393f50a59aa2a5e699acb2e9d1c7aa795d. 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/UKM4G2301002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444d57b9f7e9f3361fe760755a20fed7a6a21c9059ccb1c379cbe1f5d04c4d9d. 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/UKM4G2301001.