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 0x2375b5b9a38892e3aa23c05ac35d6f1b2688ac5608c5709de32404652cea8fad. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8574b4e3-c1a7-4982-a01b-639a56852e4c.json and https://artists.proofprofile.net/proofs/artist/8574b4e3-c1a7-4982-a01b-639a56852e4c.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 0x140843952cab778cdac672bc5846979ee9b8cceddd2a2b681c2116c85d2f44e0. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/KRD112400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4f8b2026299b792b275c995f344cb16affef3de927bd7a61e1948d4736e07c. 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/KRD112400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab728961fbde2f979c997176e465d4f8c1de2397759dc5d1d934f9ee95736a8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/KRD112300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d6dcdd29441a2b6484eee2183142345f7a2569f6dadd890b5d9e07c49008db. 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/KRD112200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfbdda7abc0f906d4b8625a04148f708a8fcaec9df0ec6f1e9557b0ae661af8. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/KRD112200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89719b62912bfb9f2e626ec4a6da0b82119d3a5c6bb6c1aa5071810acd85b963. 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/KRD112200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb344c8999a7ba2b15a73b41a2e4ff60dd50d582a1daecbdc65b60636b645f7dc. 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/KRD112200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb820ae9380830837c2ec53892aff03fe9527d466ce2e33e796e7b71d121a391. 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/KRD112200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4790dc9d2b614ebcb9c78b079ac81b65f2172d3c8abdf3c7d4080de191dacd0c. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/KRD112200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c1e99d045b1d9eb73ce932bb43b5746eb19c5a5871049a041dd4bb3333df2a. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/KRD112200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec8b41d4decc6796e5d4e36b4469fe45140547695fdd7b453e7431e0132bae9. 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/KRD112200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692748616fc964a83a5aa71500f915418dc358064b42a2260f232edc0edb5929. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/KRD112200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8ffc9ba5b09807fdc25cbdc156ce13491d671682b58eb48fee6a883d70a8ee. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/KRD112100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe935debdad9837b1b5db8aedbb405c7c504b6d18fd3c348565b632944b31dff8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/KRD112100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad03e897195fc9fd55ade516eb9019986add2889b7620bee635c6eb5ae82393. 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/KRD112100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64c6b61133135d811d4bc57039049fa9b31865aa2be835c73efc4b7a3dfbef4. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/KRD112000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b6dba41c1b7e76c0219fcf9a2872e9b4977ae3df1364b0c4ec6a889d8afe06. 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/KRD111900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de0c60b539f61c83ff4196394e840091d3b9e7a1a777945994ff8a4bea45bca. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/KRD111900023.