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 0x43b7a0c544d5c60813471e28e77c5cb0b7f1c6447e3e8bceb2db4d813e0a51b6. 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/1b5cc93c-2c50-4eea-99c8-7d24e82985c2.json and https://artists.proofprofile.net/proofs/artist/1b5cc93c-2c50-4eea-99c8-7d24e82985c2.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 0xaba73c268879f8169d9398de244850166ee555410a22b40cdcea297d862b8a0b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DEL120208501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee5482b6526dcb6315fda279a5e86a0fd679191b424b7a4feeb9a98947b41e6. 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/DEL120208505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6ea21134829b71fd8a30b199c0bf1d5f05befe452501d42e84dce1ffa1b5e8. 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/DEL120208507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447a95a12cf08d6e8aa05f0560946c2adccaa878be05f57c7ca347d480eb57fb. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/DEL120309001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9b34d77c7a05383d6caab076a2acae56be7a5c7d4d34fad3ea0c9ef1cb8801. Chain 2 (Bitcoin): anchored in block 957522 (2026-07-11T04:46:56Z), 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/DEL120309007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfc58964de9895e98c1600b53f1c8d0eeaa414ea94714bf1780616d368ed475. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEL120309008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c73bcc4dc54a634e986a35674b3590f3be053b49a07fe83b39fd33bfba61b4b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEL120309011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6981fc5a8c23da9e9dbfe1295daaef2c6cf9a04e663272dc140ba269b34c84. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:39:33Z), 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/DEL120309013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f50b655e20469a3dd644caac89a85dd6fa9c9694632343bb6d405b37cebf65. 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/DEL120500109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7bba9d403d9e9556f624b3493269d97b7b101495462522615471d9e098cadc. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:29:16Z), 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/DEL120500114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefad4f13ab013392bc53b3507d4777766946bc0fa4ff19f478783077e391d36c. 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/HUB071802595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e60a4bb3aaa43f238cf577d8a2bc75901da4579420317e44f9174aebd7cc3c. 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/HUB071802600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfe34875b5078e1f891caa0c67a7e9c909874ee6c3238c5437b1b637fca6c05. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/HUB071802601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf623a02adf5a64653976034f0120bc3180b33f748d074f4a82a026d6bee08d67. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:06:26Z), 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/HUB071802602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305e91da0c2044e0e000d7f5df0b9c6fc45cdd307093b7aac3b1818ad7153c92. 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/NOLCA1093130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86803c2d7902485d0517685bbe120ab41aa0990e5b8c011f35cf7aa3ba864ae. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/DECT11000050.
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