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 0x6ab29d87461b5a700df2472c1afbdba7b31df7420dc86cf94fe8b9e12371f22f. 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/ae59cc36-43c2-4f3d-9b58-f4dad857a4c6.json and https://artists.proofprofile.net/proofs/artist/ae59cc36-43c2-4f3d-9b58-f4dad857a4c6.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 0x4e0243f1ba2dd3752017a9524a9565dbb2320a49fe9bd75b1c293a4b4d012af7. 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/QZDTV1800197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd36a99455761325142c65d7cf2ffff45a095e6849e12548650996dd43969c8f. 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/QZK6K2317906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3287a463b190fe3dd41b2ca845bb9b99a4bcd5f0bc956d3e27f575090249624. 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/QZMEN2282498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d23ac31f733526dd878a3ee2debedf668ee7b5bdb15497804271e9be6b73780. 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/QZK6J2245952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85fcf1c9b08d96c62ab9f0ed7f499164a3ac4c5381ee54cc9682bc8dd79fae3d. 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/QZK6J2243691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b80825c49029ec6d33efcd587dcaccad11a84bff2781931756892e384f6533f. 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/QZDA82189846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28adbdbadf00b984b3b3d8bbdf6bb70dce2db704baa6dfbe7b7af6c972f843b. 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/QZDA82189847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64ec742aac0f20085d7a18d2c19a3ef4ed7ce03c29cf2f18ae1aec92fd3a7e0. 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/QZDA82189848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe266409bfc30923e1eddbc072640df08a2ad411160980f600662ae75ad117936. 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/QZDA82189849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce34ecab1c9d600917a6913e9ad79e7f5e97d42f094ee29c1483beea12dc53c9. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZDA82189850.
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 0x09dc351215897dc4e55d47de82a6a8c10d837d0171fcc7dbd2851e9a3406dd7d. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZDA82189851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252a178fea7bb0edee221a1d15699060dcbb2033ac8c175cdaa45a2508a0ae3f. 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/QZHNB2010020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd347fb8d9acf811b8ddfe073a7b1782d00dc6bc4e49e20406750d3b5578e1440. 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/QZDA51868516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29bcaaf1b08315eeca215f7d630be1502fbf0a3955268636ca3014c81eeba87. 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/QZDA51868517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218811b92237b00a636125029d41f2cd84664ed87862eb44274dfcf5f3b71f8f. 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/QZDA51868518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfc8879e8d1470d3194af440fe860e0c36bc370f27e77400b7aaae1316be938. 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/QZDA51868519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1197d8035ecda7121473234803d1b0c5b9d6ee61b6486ee923e35780b45fed. 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/QZDA51868520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd543348f6d08b556bdb4619df2b4b15110da5c802d26de9a3cb539cf912bd5d. 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/QZMEN2150027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a014e58f2e2e4ab4115d45e58e82ef07e1d73b9dfc3b180fa1bf13264c1ea6b. 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/QZMEN2150030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953597176e10aa82f1c96e8adc15f0002759146a76668884cac7b2c86f0a615b. 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/QZMEN2150036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab199b0373692fafbb9b7ad8eb777a5170fe62f497d236460b84b477941ff0cf. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZMEN2150024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd549e51dd2e701a947b8c605173c077f6037713e42040e2a25bbf6145e8d97ac. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZMEN2150035.