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 0x6d4c75cde70bc13944f39e8f957989d7b7dbe936e2923d20996329dfb3c11b5f. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e63102de-6a30-4334-93b9-8daa1963be6d.json and https://artists.proofprofile.net/proofs/artist/e63102de-6a30-4334-93b9-8daa1963be6d.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 0x4fb23ea62fff6cd8e259acfff7bb2b0503c7a4f7eff2659bae8b0c9b13c8da23. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/CH3461205776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d90ed0333e309694443c4afc8d63587afeb95995a6059a57e0744371c6843ce. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CH3461408031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d26228a9a065cbff3158217f203ea18e91550b89c7c1a8daa54fb47f5b4fb26. 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/CH3461407690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7e1799e400d395c847776f2dbedff9d0bb174c1c7dd9a2ef9b8b2b048639ad. 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/CH3461407691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3dbff724ca0dcc9cf8ad99406315aef2b84cdfc0ac2aa6bcb28826d93a0c1e. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/CH3461407692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40e02d889d9123f679e000b4ac12b1573c4bb3583d6f42bb0f76d907740f867. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/CH3461407693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688993c8a3cc532f53bbd76990296635aabe6e483601ce19ced56bc0baee3d9e. 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/CH3461407694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708f092fabb57698fa0a6cbab3f6e77017b5298d916c365157020edb61a945e4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CH3461407695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10a317802094133683d4636bfc5662af2f2fa009628cb8289078c60b007a36a. 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/CH3461407698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24fcd219166f2902771e6a3a8b596c871b96f2dc16722462b337d7fbfdec9533. 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/CH3461407689.
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 0xd942db866462ed346a6688af8bc822dfb6cf151545f2bc660596eb5dd1147290. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/CH3461407696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab50497a23834fef4b33efc056e23c30d4eebc7a71de35980c0dd21622fc6259. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/CH3461407697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef70bb06753eb8e6514b2cbf78047c93d34ddca3f982bacb7f076fe517c2770. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/CH3461407699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ac6e17a0ac5426ccd72e5b7fbb35a6ffb166093a152a644e513aaaea426a7e. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/CH3461407700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd113a0c2920f5aab409615ad15e1f1793d9f804424be36df33633c8d58e6a62c. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/CH3461407701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83e4b2421d4d1aec9705bcc44072cabe9f42b6db4a26c0b8d03b6f7bb83f679. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:07:20Z), 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/CH6541982091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb8c712848fb493faeec44bc258dd9b8670319d512cd085d38796a389bb4827. 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/CH6541797031.