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 0xd2cf8e155f7863050594ef6808f7b7554fe623f2813e73ce2c0dbadc7e9563bd. 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/a4311d6b-4d6c-4e4d-ad85-72a92dbd015c.json and https://artists.proofprofile.net/proofs/artist/a4311d6b-4d6c-4e4d-ad85-72a92dbd015c.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 0xb8d7f1789f3b5c08aea86122d4045974b80f0eb35b0ab671305bca4b9f2e0558. 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/CA5KR2330625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc790bf9eb33b5bcaa19f5a8b412d7b00633f7f961a23c7398c13c6a16701d209. 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/USA2P2361151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a2f35cd7be7be42d7c51646b59d68119a935f579f31aaa69cffaee53c4c353. 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/USA2P2336257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa872fdceabdaaf70edc37f6e626b55b8ae3335bd567597c3be02fc9060c2b0c9. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USA2P2361153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a237d8a88cc98c80f37355ae2ee73b1ee86f403d5fda80eade7c30925d0a70. 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/USA2P2361150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73028179ac1de6d5121726e818e3455801737961bbfa5486ca5cf446435bdd3f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USA2P2361152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd243e34e172e8dd511f4121b9d54b822020dbe5d86cf39f431c09c0eda7887ea. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USA2P2333366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea30676b824d2db8099ef82dc05b6ddbcfa273c482584610a74f72190eee314. 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/USA2P2361149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7709497e860e1112274a3dda64db23aec79af1e24f0ca0a2373782cc5d2e9e. 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/USA2P2342160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b70ac61d646e45617aa1250c10671cec30d7616991d86444ef41dcfde173ba. 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/USA2P2416948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8932ec16c48058e3e2c679adbadd90f176746c29f9a7945307a5bdee6340f01b. 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/CA5KR2428605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740e3486dc4313467ceeab43de15e29a63cfdcbe8ca2e72d8c0f73a4362927a3. 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/TCAHK2328420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0595a8d4dcd4ff91f61b949e26c7841b25e5b5ee02d7ebf2143bdb7c635ec359. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAHK2328472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76fe8c3f9baa87f3a6eeb34914216b3b831a0b3a0c9d77b04e91f61107b7bbf. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TCAHK2328483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda489e9721ec086bec10690ec499078306e26ad046465895b7be92a9610bc16. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCAHK2328506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf173681b54d57cc9dda5737c27fd21cd0586964f14652bf7e2e97afd5638047. 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/CA5KR2191352.