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 0x2ba40f438d0b023ecbbf1ed9d76599f35ed315754f407bfa2d2b6a9a56ebe9d7. 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/02191ad9-16e6-4cbe-9c30-df6cbaeb6f4e.json and https://artists.proofprofile.net/proofs/artist/02191ad9-16e6-4cbe-9c30-df6cbaeb6f4e.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 0xa92ca4098ea78637427597cae1dd90945792f2d2ccd76ae54fdb490bce76b96b. 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/HKG291500448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2e55aa7130666b8ac9a76f44157087b29b237c51bbd4673a5f98b8dc8ce5af. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:46:41Z), 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/HKG291500449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9074d5fc0aa210ab0d34ab1f8840ae529dfa0182c1e6bf765eeed2d75a68a0. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/HKG291500451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6e57da3d3b2da73d5837193683f55b4552bbc63f0136cf2c6463884877fec2. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/HKG291500440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067062632a5525357effaa6321e5f10658c7f4b16434acfab19fd78927d4f34e. 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/HKG291500445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8427a590fb4edefacab2af12b6c6862141540b6ea85db52336ab68ebd17ce8c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/HKG291500417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9d06043b1b1a5c617e5bc40a955547c48cc34dfd78a2abce14bf8a627f9309. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:27:50Z), 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/HKG291500418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6165d63c6ba33b13c113abee0b76ec91b4a0f132a75295daf519b810aa8d08d9. 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/HKG291500421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c5cf4794dc657a3fee7167e0005ff27a01ca2ce95f1c288d610ba135091068. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:11:56Z), 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/HKG291500422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb395337dc20f67c90092a37a1a01c189ca1aeab5080c904813e27f370582d48f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/HKG291500423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382be7065403153f37361b924f9848cecac9d31e957bfbc58ab91987ccfe5b4d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/HKG291500425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9260702ba2706cc0debf46e614201e18fd5098d508787fb8e2eef73a0987b3f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/HKG291500428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f501f7d118daacf801d6c060fd0314ea89d94a633e9d6d554e57819df46125. 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/HKG291500429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dcf6535e98a4880d78d0708712dbf671535e02413c040d98d3d8346573f85b6. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/HKG291500430.