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 0x169d1e83544413e593504b8607acabc8e20f593ea0de355d24999122d5fcfe80. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08edb7b6-4646-4328-a244-0248b3bc0ecf.json and https://artists.proofprofile.net/proofs/artist/08edb7b6-4646-4328-a244-0248b3bc0ecf.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 0xcca372dd8a2985e7ef5728872493a68a9d695c2371399517865b388059e40506. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USANG2101669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc6378d9ef4a9f52d05788021c010b34b26b8ef617187c14c2bc8e87865ef21. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USANG2134576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882ee87db9006ed4c6b52697edb8c96e473c13467eafa66765b9b93e3280c2f7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM3DF2113833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf33274edde2d5b73c0c084a440fe8f94c9106df884b7be7f69fc1534852f701. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:28:37Z), 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/QM3DF2178545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22aad951c6463b3d81ddee518910bfab3acf809ea9e2965662b33920c5bb726f. 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/QM3DF2179233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e4d26a4219d4955e2d1918bad3da2ad5abcdcc6678f220fc74cc4db8e45e25. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QM4TW2250909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b33378a500b3895ab291eb29a3d089616bdbc6088d6486805b2cf5919f546ea. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/US3DF2236073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1664db610c4e66dbf8bc4863e2b7d61bc58668e44145266ca32fbae022e58438. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/DEZC62321633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c542a2ba67830d8f5f61a1d9ec7a51c77c72e7ae5a63c74683f2c06255888d5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DEZC62338189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d944f7250e8d9b02b6d970560616378dcbbc701fbbcee5386cb4cb2011d443. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USANG2295538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7441dc4d2fa0b4a2c54a146abd893f05e74a1f8f20335ff82ec23b568c61275f. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/USANG2295547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc0509872a33aa3c670a0005fe9ee09e73cc0a8059d85721d51b2b271ea0b2b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEH742435666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9d5a03714698edd84b17fff92ca5d0093046369dd43be94ba82c49c28f1d7c. 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/QM3DF2141531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c176ddadfa5e9320510c7a761b712b5a2b6505804a4b82957639409fc42ef9. 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/USANG2233421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92f75d82d9a53f6a73dab010ba49258ab4187aa55e61eb37d604c19a8bd693d. 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/QZDA52483450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba92f914bf6d8fa727134c9d520aef3a5d546a8c3c38a9d0b5b036e872f738dc. 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/QZDA52483451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed8f2edfda90d1a17a7d623ac438917c115ae6a40d2d44456a64c42c2e1e82d. 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/QZDA52483452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28400de8c9d0a0f4ae72dd4e2fd2710f1980970477edf6cc6bf7130c21e5a988. 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/QZDA52483453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aaab852ed3f04d50eb07a0624a47d2e5c2065b483c98e15c30090ead72ccfba. 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/QMANG2213962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9bb77f8fb29011abc2f92fb00b732088da45414f9f9c87a9d0720a8f88eed5f. 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/QM3DF2283734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161a408dd38d947877ef2f0067e125cac87d9a93787382e9ed15f55f8b915bfe. 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/US3DF2472063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf71f8220d17836e0e08b77cd7333c7cb06d03a5364779d5f4ba1e6245f7930c. 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/QZDA52483454.
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 0x7ae591e40e5bdf4a2a0268b19fb010337aca560afbd789d88f775f7fd52d5941. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZDA52483455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee8780f6aae58cbe88ae4ae58ce3bb738c56532dbe0c36ee07ff5ea20c6affd. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QM3DF2175190.