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 0xee52d06fa4928f6198dcb192eafe07b44832112caadea65d14121446d2ea30cf. 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/761ac7ea-8add-465b-a70d-8bbaf6f39b66.json and https://artists.proofprofile.net/proofs/artist/761ac7ea-8add-465b-a70d-8bbaf6f39b66.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 0xf845292ed239488d499798bd9705f9a073bce1bbbcdec1535bbfa2d9c448ba83. 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/QZQQE2100453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcee171dd41f6df8e6c17e4f26d4555439c90b28d8755f8455bf43c782a390c6. 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/QZZQE2100454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b452e39e760591f104f9762de1a210201b9e389d1cc1501f13b6b2dc8a389f. 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/QZQQE2100434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865e95a8afc30adeddf9f00ebfadf7b7cd7afa3e35a0594ac48d47b940ad3ea8. 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/QZQQE2100457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe462b3498aaf766da75b6003103e9f51d1acc44ec37b8ea5075e1201c2e7bb67. 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/QZQQE2100447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42a7ce6f0532617162c701aec533ec1497873ee8860c28f341e733011ddcd3d. 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/QZQQE2100459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10e8879875b7283531358578c9bf25544aaf685c3607a4e4c5b44c90d462e5b. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZQQE2100460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0801cc11b605fc843e8018c2c8b01660d62fbd342169f44ee6d7875c378599a. 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/QZQQE2100461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54fb6876c569830c3246cb4d9f660d2582dcae724dc5604e41780102bf075d19. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZTBC2360979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f40789a94b91c653d478671b41b870a262d8d07ea1943fa21caac0bbc6eaf7. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZAKB2432328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f40789a94b91c653d478671b41b870a262d8d07ea1943fa21caac0bbc6eaf7. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZAKB2432328.