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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
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 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/HKG291500449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9074d5fc0aa210ab0d34ab1f8840ae529dfa0182c1e6bf765eeed2d75a68a0. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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 0x08fb180aae39c6be58a0d12917788edf939d6d5aa8a4122659c47f3e7ea45b54. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/HKG291500459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a535b50e9e4c57486754410806c38e9e591429f6af6782b33f713b3bb8d701b. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/HKG291500460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1840632702added6394963fd70c2bbe0803cd8d142a9b521d8104699eeb552ac. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/HKG291500431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3506579513ecc9091a50b714485389d4bbde9f927bc891ebcd38b021e19b98. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/HKG291500438.
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 958395 (2026-07-17T10:10:33Z), 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/HKG291500445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364c9b66851193a9f6c33602669e00111e4b15b5e506c8ba595e68d59c88b62f. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/HKG291500446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8427a590fb4edefacab2af12b6c6862141540b6ea85db52336ab68ebd17ce8c. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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 958166 (2026-07-15T15:55:19Z), 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/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 958742 (2026-07-19T14:09:34Z), 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/HKG291500422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb395337dc20f67c90092a37a1a01c189ca1aeab5080c904813e27f370582d48f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/HKG291500423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899b727fc8efdcf7e8d0d94c836b64399930ee16320e1e02da9db8939ddc1c51. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T05:21:06Z), 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/HKG291500424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382be7065403153f37361b924f9848cecac9d31e957bfbc58ab91987ccfe5b4d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/HKG291500425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b48de18c27fdf11330d3df30c5152354feb8b0fbad460d069896c0e695045ed. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/HKG291500426.
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 956822 (2026-07-05T18:48:28Z), 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 956725 (2026-07-05T01:12:41Z), 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/HKG291500430.