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 0xf1e4f38a7fcab92ba2ff6c8c10c2861b7f17d7d4f64d2d3bb3f5772ff986e0ed. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5efca493-f74c-4158-a210-02f6d8899a17.json and https://artists.proofprofile.net/proofs/artist/5efca493-f74c-4158-a210-02f6d8899a17.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 0x5aeeb7edef6b89a936b06a778d8e12cdcff09341690942abe68c7f19738d625b. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:10:47Z), 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/FR9W11610569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff9aa633bef578fecc59157f612a74ef9cb137ee9a2d70569179ca4500fdb24. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FR9W11610568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc6e4b4f7d2979568ee1027b556932378450d4b73f74c40c0583340bacc4595. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/FR5DN1700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b374d3265015a50b6855be5c13664ad0f0eab463ba3e7cd87ea4db414339323. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/FR5DN1700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78464770d85d15882fa85ce33ac029dbebf04c1a80db6e05791ea6d82291f57d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:01:48Z), 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/FR5DN1700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0049e1e5dd321e40d652eb9389bd2a6025ce78b0ae5d1a088a75c76adbb8d6f9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FRX282220562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57244f1c425e39ddb616d007b07df2c04d2304f30b318d4337e2bbca417ee79. 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/FRX282220557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7467d56ddaa5472c70db1f73bacd336d0a96542a30e84e0d800a8884a2b15448. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/FRX282220563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee3faef583c97c6ad5e8da341c9ef5030b3d9a10809ae9caa8f3a823e17e9ea. 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/QMDA62505852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13570be39ef83c62c92fd5b9f142e42ce8b864d2e75b0a7278cb7e97560fe3ac. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR4Y91500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13570be39ef83c62c92fd5b9f142e42ce8b864d2e75b0a7278cb7e97560fe3ac. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR4Y91500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a307ec180d96e71d7ca54eba002c4c6f4d8cf167bd9629ce957e47fca315b04. 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/FR4Y91500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f50089d385a5e696a7899845ddedf14e0bfe97087dabdc8bc9f53416289bc6. 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/FR4Y91500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e15b88a0ec77e6b19030da32a906c7221b098d9d9036db45454232f28d18c5. 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/FR4Y91500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd07b41f8918f813826f89da21edc17f2f1550c98e2db5cebd733b55d68b2a1. 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/FR4Y91500028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13befb61264573f14de64b4fa08ce80a142d37a7b9f754c2fe5dfd135667c610. 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/FR9W12337119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e8fb991e0541ecf583187dca3457a87205c10840157a1cb584f26f10fd7b57. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FRT461600040.