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 0x13dda996bab442dc4b2690b1a58533f686869ed8d943a456bc41d1158c233764. 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/e1dfffa3-0656-40ae-aadc-18a0bd448e5d.json and https://artists.proofprofile.net/proofs/artist/e1dfffa3-0656-40ae-aadc-18a0bd448e5d.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 0x561996d7f72c82e3530c8c6f0321555815249db48778ee2b55b0dd26f1492bd9. 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/PLA247014190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd51daeb330247efa4ec549f4af721a68ffc7ab1603675ea18869c5c9fcc6c3. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:41:54Z), 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/PLA247114562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ad933e253bea1056fad30593b947ed504015eb6d2cbd493d650ce8d8862316. 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/PLA247114457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941a5b4475d0f5f6cd688c1ab0bc74e37a17fea9ea5d39c8ad795f1bfe677108. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/PLA551800874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fb517ddf61e766b496eb58426e9d4597fdaa20c0c79da97bcdaaf636e34be8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/PLA551600573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5626cf6969304f035f2ff56aa080337752ca7c597bd115af45834dd94d81f7. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/PLA551600566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5626cf6969304f035f2ff56aa080337752ca7c597bd115af45834dd94d81f7. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/PLA551600566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44bceba985c3cc0caa0b93d011297805d550b55dd12befb68871c06a3fcb877a. 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/PLA246913329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ad47e61b0b835cef452753eebb257ce5caed3916f22ff5f59da796ce42c38a. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:50:53Z), 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/PLA551600577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a7dd7f54d2e299f16a8e1d8c083cc8f3710de6315a6c83e049e8458a2a4b6a. 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/PLA247519767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a7dd7f54d2e299f16a8e1d8c083cc8f3710de6315a6c83e049e8458a2a4b6a. 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/PLA247519767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33128f286e6feab3ab94416727c9b121b97c1698bd70f734b6ebb047c7bc187b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PLA551600609.