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 0x88143ced37f203b7b841a9962b9543cab3c80358d06a23df920f229c59bdec47. 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/54a358ba-ddbe-4d72-97f9-59b617d5636b.json and https://artists.proofprofile.net/proofs/artist/54a358ba-ddbe-4d72-97f9-59b617d5636b.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 0x2ed31aae528aa031b06ab88aa8415ef7bd8ada687bfbe2ecf6de9cd8139e21db. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZPYN2471724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5145b37c9e95f6366b77fae92db2cb28528d96f6f38e5189639048d56bff34. 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/QZPYN2465802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a08cac3832428dfe1a53d8299ed42033c87313047542e5a59ea532ac045442. 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/QZPYN2461885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898be9bcd1cf3a00d1cefffdd60cd256b0a9969e64c9c572698810c2855c230a. 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/QZPYN2379986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2a0c3507305b977a62b342a1b054a6d9bd489ff5f5965c7e02ebb3fbe706b0. 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/QZPYN2377505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f87fc3939e75b379de4aafc474e0be1916762e566710fde619925f844ee31a. 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/QZPYN2370202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac18788df0bc8b86b3011296c749f4be69620f50553d6da35a96f71b72129d23. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZPYN2370201.
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 0x0723beefb7fb0afc2ae5acad84127fc66378d7d091d2a474344e56ea85eca195. 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/QZPYN2366624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6a55c240a03956dd14da373d3a0f489613afa1cb8375e1ce5ca286af7737f3. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZPYN2366623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ed268629d97f6c69662b6453a57d3bd777c7ce33c8acce398a53ed2a924c15. 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/QZPYN2365773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0429f4251ec499c82a39e8e80a6af15f9b43274d9ea56ba39c98cc6bef6e82. 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/QZPYN2362058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181a7cf66b0e657e34c543af0a77d618095d643ae0680bb313eed4b16264f95e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZPYN2360721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e597b5c66f76336be7c4d5c34982b69c9d376d558d704d4ba17e24e1e5dc98. 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/QZPYN2360085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bbbc34e484f04e97ea9084e3f8629e576f5f93bea8ec123a76c4750c2bb032. 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/QZPYN2260821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc651d848d5279636847142ada5c2c1640874452824d23088a1e01cdff3c11c4f. 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/QZPYN2260822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b0c0e070a2f75133a86b68c7df159825e2a36277401a432ac501b71090241f. 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/QZNJY2243738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d64ac49a5f1e29fb445cf9b966ec0a09598f538bb2f8e5892311f030054c2e9. 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/QZPYN2202928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070a86485348d064e5cb6bc02b72cbab1b25d2e4b9e6cf35e2c04dd4520ca1f1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZPYN2119207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0bbdfbd41405d76c9d206df1eeeaebcc1c6d73994f31dd130e187eb99eb95a. 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/QZPYN2114504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd0b63744bce9b6cc9fad508e3bba70ac64988e71af680a553bbc3c4450647c. 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/QZPYN2114505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11177b770ea8570677c9d74dda75eb060495d0cfee0da5fb851e6169a09f2775. 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/QZPYN2112412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b35472b2bf205581723d59400d1310c7e2dc98d65856640cab04db07ccd817. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZPYN2109786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1618e5b81680c4177bb8ba8d11de3fa35e087fd733469e6bd956ecc7f070aca0. 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/QZPYN2105173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9e865e50a7e61b9fe641f5158ee6a2687a6e0c666fd27f12586f55199b4f86. 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/QZPYN2100866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507cb2c64bbc2a62f74a699aefef310d0c4764265be95d46ef44a1365af42fea. 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/JMA272011528.