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 0x803cb792f11ceae7f1b9a0d1c3e4249cd3e0f4fc4a82315df2646b1ff549136a. 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/1deb0e73-9e57-47fa-93c4-88693a10ec25.json and https://artists.proofprofile.net/proofs/artist/1deb0e73-9e57-47fa-93c4-88693a10ec25.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 0x4c62afe45fa832dd61fb9044c2f0a06e4fd65e4c924716272b284645c9fd2ee3. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZHN52082849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e525ea68e6507ca844b7e000e76318199f4c718b94907cbe283717a018c9558. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZHN52082880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4ad5a895e088342337addaac9a22356998cd338b7a807a6402531f32409548. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHN92069104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a749aa75c281540018f5b94363c266b6b98a734f6730e586acad5e02d87a84b. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZHNA2119717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25c3c38d5581ae8ead6611e482241720578ae789a7b4b58ecaf21afc6ea1490. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHNA2119719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8855d042092f2319377ce7cc598e039a35190bb859179bd10171ef77a4d63e83. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZHNA2119720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8a038706fbc4b3f143a29200f41b9a320409b508cbe0a142765194eb10c1e9. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZMER2163071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38ff0e4b4573201c8e0fc4bb1e1d6a009154f5dd17df198627f692d06825293. 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/QZMER2163073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441c5c54a82ab7266229b6ee3fb52af55872f0a9e42d1b21ac0a6f604ec408d8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:55:17Z), 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/QZFYY2278429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3709bdd5a8847be63d1a9081f7d468004a736fe9a241284a9c5c0c36f926d78d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR96X2303454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6e55771ea85f6a6e81b37a18342cf0c0815604952e1917dac9eea68775494a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DGA062315779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e64425d0b32007c746bb3f07a601087619a00644bf33d5ffb37df57c076f255. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRX282407936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c445e9e5347b7e241eaf226815b339980c5c5fa6bdca40128dc7845f98dca39. 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/FRX282407923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde217dfb4f0a01301c3a0a483b9ee0859ecea0184bbfeb9fed40359e645cceb. 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/FRX282407925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a5aff2f24c9f6098ada0bf2bcbee837b313ed3e80645f303f51e0a0302dadd. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FRX282407927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2cefd870110032d7b3d39d8417ca90697f3ce1446dbaf342980c1f49f38775. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/FRX282407930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3a60aad160850a51d2a1be4f240b0b55234a52dc32dac9c7a340e0aa65d70a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FRX282407931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a5f68c8b170d29d7515c40be7e49a334d8fcb9bc80c8e416957f36e1ee7b13. 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/FRX282407932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb416b7066fea07a869c63dc20406c57831b762d65eeafec8d204eee0fdbcbd48. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/FRX282407934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdff63eeac0a1e263d6db7dc36190407cf81455d9b4fece7e80dc7c2dbf46441. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/DGA0L2412950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcfac90bcf4ded890e62b81408a2de2dfda78a8c0e6d90bbac65a00524236d31. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:22:14Z), 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/DGA062503801.