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 0x6f7ac4afc4fea5b30f82277720324ac46022a0c1933eca36434b7d3a595407c2. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c1b28ad7-468f-4379-9338-c8bd13c8f592.json and https://artists.proofprofile.net/proofs/artist/c1b28ad7-468f-4379-9338-c8bd13c8f592.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 0xbec6e396c313dd7310e375421bba58677ecdb4d447ba9c7743c80ee2b3c71bd8. 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/QZTAT2207160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728f053a0abf3d69b9d0854f3d8a94395761846eafd1f71bed3c8cdf74e19fdb. 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/QZTBE2389614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596cb55bd5f729f7dca4612cd31467fc2f065e1f2579aead1a1fc7d344da8222. 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/QZTBE2389617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947d94f166474dc21bee769aef301e073c458ef0e0a3a7596ab7988ee2b8525c. 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/QZNWV2253961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433e53749813b54f72eabd9a30ccbf132dc608bd5a6acf0d8f8a8cb1d6ca1a2c. 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/QZTBE2389618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e12a553a4ce1a190a8e31dee8ceb5881dbefec81a550f61d82c80a0db2272b. 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/QZTBE2389622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9857afe9cb2132d263dc3b7439e47d32da0ebf383a4e1eb4b4f40af99a62d624. 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/QZTBE2389624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ceb5dc38d7c61208bc907108258d8682b71502fda7b10b6a6c82ac91818cb81. 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/QZTBE2389625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfcb4781c529e04cf89941c739aa179fe612a9b1e56a656723ee19841b736774. 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/QZNWR2314417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e914a38f8925184c720466c25bf13d865f6031a7c60506031dbae7849fdcef. 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/QZNWR2314419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d80419d66b4839ee0d47bd62d88f1d095ad722a8077e083dc47c15841697d30. 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/QZNWR2314420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe400026a5e0bc5cb0a80831fe5f398ce596743163154401c123b8ef67b8af3c1. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZNWR2314421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d64afee3fd86ef03f1284a1f7850ace9b1908c9cdcb867f2594d7b104498476. 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/QZNWR2314423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82669fc419fd63ed253b564bbf9731a55228f4077bff38ba5cbfe3d51f149fc6. 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/QZNWR2314424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293fb389af805f7832521e2501263f5b5690929272a066a3a2b1d27a78e1c641. 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/QZNWR2314425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf28c46d7d114efccbb8a3cb7258d383bf96447a27c0e12bb01211c78848ebf. 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/QZTB42229418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656e6f62e2c5f483780f106af441540b0009ced4f1c26f8e37f4676515530169. 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/QZNWR2314426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ed9bb6759e80010da5b7ace29c90ea40b062743adb74029382ae53cf5f2f13. 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/QZNWR2314427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6322317108bad197fbf8e47bf0ca71188d1b088d65f8e649038dfcf65998b3. 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/FRX202049308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd531ad549b4ceede83a5ab70ff499de301c7906a9527208e6310a62929802c. 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/FRX202049316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf31ccc9fb4949baaae120cf9a74cf1d4a3fd3930f990cf63932320780ad070. 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/FRX202037258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe118569455808177be6eec7da769243d2e4953ac275621d97553345074e27d4. 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/INS172217750.