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 0x06d26326feb497d299f9f32637a622468570593516fa78e0e40f908a0b33f599. Chain 2 (Bitcoin): anchored in block 953783 (2026-06-15T12:24:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d69fdce3-efad-4126-8d2b-42a056dbdc4b.json and https://artists.proofprofile.net/proofs/artist/d69fdce3-efad-4126-8d2b-42a056dbdc4b.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 0x19dc7a23a65f9269f91bc3be5a1b834e5d0f0cfb6a6ed467f0e0b121f93d9439. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:34:50Z), 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/NLF9X2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a203669060545639000ba0a3e424ffa78c77a19065a306e85708c4b2d9cdf74. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NLF9X2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1692acbb1b1e00997c44ae839f0ffec758d2b8580e23ab343e52c86f612c50. 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/NLF9X2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae8a50469a5cfd6752079f689ac7ba20a2addb975049e376d13ef49c70cbd20. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:19:14Z), 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/NLF9X2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49df18d912aace777549112789fbf17d2b217ec8c0eb983c4f6a78db987b4404. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/NLF9X2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d704544981c34236851c09b57fc07ba747bf8c1bc206adeedf7c1100722477. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/NLF9X2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b8e9ad4eed7f3b5dceb22cea1ebfa95ac7dd3cde2851b4373fe7af569d9073. 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/NLF9X2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c132bbff2f3db2fb799e6ec87702c92db06170b1a11dd185cf7826b7ee9453. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/NLF9X2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81625a45a40a5876cc2792e0aeac35d1bebdf877400f67de6f23d60f8c572bd. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/NLF9X2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216281cc592c8cada7e1692f95001db4ffb224ec3678fe9a20641e63d3e3c783. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/NLF9X2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ed577de5d823b0f2b89b3f00d16d68e14510735e0ffb019fdc34a7d7ab7b90. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/NLF9X2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624ec6e1b954bff14ff85763e59b57b6e5288a56aebbe14355f1b58c25f309f3. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/NLF9X2100010.