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 0xdefd54effd3a5952992f11d9bff6acee741e63eaad64f0edf3e7af2040c10b26. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb066477-999f-4573-9535-2913bddc1a3d.json and https://artists.proofprofile.net/proofs/artist/fb066477-999f-4573-9535-2913bddc1a3d.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 0x574eeb7069956caf5afcd3dd4c8aec4d684bec3d643e219350f82a772be71c94. 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/QZMER2292142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be8889e0ff53c0244814f8ed567a37cd090d888e077b7cd997a76e12d84cd4d. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZHNB2469392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758737995947557c7aca34e651e262624c451436d6d2f5ab7b61f0b27ea3f163. 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/QZFZ62490654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b55c44587bcf6e13cc785d3240440672316f11857416c803cd85cff36bb4b1. 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/QZTB92327342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7317db5ad0b66e932526c3de4eddc3b98d4b5d5242ab32509929e5e4807b67. 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/QZDA72330979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144e4457bd4fa5e01a79d9acdda016fdfd2f553de80373c510f0abceb4cb9608. 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/QZTAZ2285993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb607c4a27bffb78e98944048587bcbe85c054a8cc026aeba8fb63cc40b3c9ae. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWY2234557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39adc88c30291652708cf1f97d075b29fe5769b786b928afbc49bd244614597a. 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/QZNWX2171188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ebc0d5d6e79b703fddae791f2c4218d4770246f4ac5172e4b0d29f863fb7050. 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/QZMHN2232268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0d94558c3f27fe5cb4bcd00d35619a3beeb23fe833cc43c5f14f9d49f0018c. 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/QZMHN2284196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a00c2df9ab913d2045432b14daa247a63421a4267beb6d2f25572fa042d55a9. 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/QZDA52341090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d54128aced0da9ffcc016d4e8aad45da0f63958cc1aaa8f753b791e9e97f687. 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/QZNWU2274811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a16a55036ad6e1117af56d25e1a183247182f98333e208abeb30548a33031f. 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/QZTAY2589669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47bdefe62f89bf2284f106ce70d23c216f5a99d2ed5caf1d5dd312461d9fc76. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZPLR2590026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba94acb52c67748c07a75d1736630a617231ede31396a076c99200f5cf615a2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE6XX2503963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f323025421cf18d8b88c9cdfc90cf8c46158b9f244709e6439f4320b5cc164d. 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/QZK6K2582323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b535fd6db1886c97d5658dd5fbb5d87ab5c1c797050143497fa9c34982baef7. 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/QZHNB2530018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e0d5dc1d4bcef0c6657ec7ec4d510b5f6891dddb431198b2da9b30cffb07a0. 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/QZFZ42533668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a84bc010a7da53c6dc80930ad65752462d526de51fc972ba7f4f4ffc2e50a16. 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/QZWFJ2433937.