thumb|right|220px|A woman performs a cursing ritual (Hokusai) A curse (also called an imprecation, malediction, execration, malison, anathema, or commination) is any expressed wish that some form of a
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 0x26d2ac2ffac31e550dde0da65905ccdc11a651e66f58afabee60e486ce360fb6. 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/9f2ad9a3-9a7b-49df-853b-02ef0f11ca83.json and https://artists.proofprofile.net/proofs/artist/9f2ad9a3-9a7b-49df-853b-02ef0f11ca83.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 0x3f3cfb62d98e03c9ebe6c3a7366fead39e615e6a86412ee4cf59bb1d81119cce. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T16:58:07Z), 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/TCAGZ2324464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855bfd385a7096e2124793893c53317c6d5960288f1e2d4ee308874866b6218a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAGZ2324477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e4e425fbe899f7e6917db0c9211ef4852525e3760d9292d2e9b35035bb66a7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAGZ2324482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e25dee6349d3e7b8d878defbf335045b5aa068c915bf3fa281d81e30ed52c68. Chain 2 (Bitcoin): anchored in block 957676 (2026-07-12T08:20:25Z), 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/TCAGZ2324485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd0b1ccfc07928448f85ab3ce4aafb9bd90c5465b0861b47a4dc6d8f1655d42. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAGZ2324487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff030281d78570f3b6ad06ab7288b1be6083b0f1df21c25e4c0bdb88b12b758d. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/TCAGZ2324497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf948abab54110c02225cbe683cde2126e02b394c29cf0fc1d51fdc3cc7c6ddcb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAGZ2324500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb308b54fef14964fd7bf52639895c09379e563b9c6a9effc1ad1190e7630aae1. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ8A2461628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97cf2a01a2f1af03da81711e044a393ea4b6a2d35faf15a01abc702657eca894. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZZ8A2461629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e6aab9b2bdfb9cf77759752d6b46932e0e23e07a8655f586ce7d8a2dbd1680. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZZ8A2461631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08792b6da0bf6973decc30faa910d38e05b7546b3e6b06d34942cbd1f5b524e9. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZZ8A2461633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd39dc2e816d2c115734921f9b82388bdde3c4d1a6e3d3b73c7a55fc72f08981. 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/QZZ8A2461637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870ec7f7976b4c55a2c76e208919d44e82cda4e57c22c8eb1d5feae68b945994. 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/QZZ8A2461638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327138cb2ddff3609056a231eab7c1f2c7c6302d7afb34261f30bb6a75eee512. 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/QZZ8A2461648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881e1ed50780b261fd0f27b8cbb4430e382de414b43d1aa64b2c4a0406c180c9. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZZ8A2461649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1b5c45f6f454b17099e02019ff439c15f2c6fe66a50692e41e9a44f4cee74f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ8A2461653.